THREADS Example 1 public class Simple Thread extends

THREADS

Example -1

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } }

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 “Jamaica” --------sleep run set. Name get. Name :

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 “Jamaica” --------sleep run set. Name get. Name : 0 Jamaica

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 “Jamaica” --------sleep run set. Name get. Name : 0 Jamaica 401

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 2 ref 1 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : 0 Jamaica 401

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : 0 Jamaica 401 0 Fiji 492

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : 0 Jamaica 401 0 Fiji 492 1 Jamaica 947

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 2 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937 Jamaica 97

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 2 2 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937 Jamaica 97 Fiji 447

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 2 2 3 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937 Jamaica 97 Fiji 447 Jamaica 598

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 2 2 3 3 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937 Jamaica 97 Fiji 447 Jamaica 598 Fiji 986

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 2 2 3 3 4 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937 Jamaica 97 Fiji 447 Jamaica 598 Fiji 986 Jamaica 699

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 2 2 3 3 4 5 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937 Jamaica 97 Fiji 447 Jamaica 598 Fiji 986 Jamaica 699 Jamaica 164

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 2 2 3 3 4 5 4 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937 Jamaica 97 Fiji 447 Jamaica 598 Fiji 986 Jamaica 699 Jamaica 164 Fiji 482

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 2 2 3 3 4 5 4 6 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937 Jamaica 97 Fiji 447 Jamaica 598 Fiji 986 Jamaica 699 Jamaica 164 Fiji 482 Jamaica 796

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 2 2 3 3 4 5 4 6 5 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937 Jamaica 97 Fiji 447 Jamaica 598 Fiji 986 Jamaica 699 Jamaica 164 Fiji 482 Jamaica 796 Fiji 144

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 2 2 3 3 4 5 4 6 5 6 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937 Jamaica 97 Fiji 447 Jamaica 598 Fiji 986 Jamaica 699 Jamaica 164 Fiji 482 Jamaica 796 Fiji 144 Fiji 597

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 2 2 3 3 4 5 4 6 5 6 7 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937 Jamaica 97 Fiji 447 Jamaica 598 Fiji 986 Jamaica 699 Jamaica 164 Fiji 482 Jamaica 796 Fiji 144 Fiji 597 Jamaica 853

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 2 2 3 3 4 5 4 6 5 6 7 7 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937 Jamaica 97 Fiji 447 Jamaica 598 Fiji 986 Jamaica 699 Jamaica 164 Fiji 482 Jamaica 796 Fiji 144 Fiji 597 Jamaica 853 Fiji 522

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 2 2 3 3 4 5 4 6 5 6 7 7 8 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937 Jamaica 97 Fiji 447 Jamaica 598 Fiji 986 Jamaica 699 Jamaica 164 Fiji 482 Jamaica 796 Fiji 144 Fiji 597 Jamaica 853 Fiji 522 Jamaica 152

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 2 2 3 3 4 5 4 6 5 6 7 7 8 8 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937 Jamaica 97 Fiji 447 Jamaica 598 Fiji 986 Jamaica 699 Jamaica 164 Fiji 482 Jamaica 796 Fiji 144 Fiji 597 Jamaica 853 Fiji 522 Jamaica 152 Fiji 582

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 0 0 1 1 2 2 3 3 4 5 4 6 5 6 7 7 8 8 9 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : Jamaica 401 Fiji 492 Jamaica 947 Fiji 937 Jamaica 97 Fiji 447 Jamaica 598 Fiji 986 Jamaica 699 Jamaica 164 Fiji 482 Jamaica 796 Fiji 144 Fiji 597 Jamaica 853 Fiji 522 Jamaica 152 Fiji 582 Jamaica 325

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : 0 Jamaica 401 0 Fiji 492 1 Jamaica 947 1 Fiji 937 2 Jamaica 97 2 Fiji 447 3 Jamaica 598 3 Fiji 986 4 Jamaica 699 5 Jamaica 164 4 Fiji 482 6 Jamaica 796 5 Fiji 144 6 Fiji 597 7 Jamaica 853 7 Fiji 522 8 Jamaica 152 8 Fiji 582 9 Jamaica 325 DONE! Jamaica

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : 0 Jamaica 401 0 Fiji 492 1 Jamaica 947 1 Fiji 937 2 Jamaica 97 2 Fiji 447 3 Jamaica 598 3 Fiji 986 4 Jamaica 699 5 Jamaica 164 4 Fiji 482 6 Jamaica 796 5 Fiji 144 6 Fiji 597 7 Jamaica 853 7 Fiji 522 8 Jamaica 152 8 Fiji 582 9 Jamaica 325 DONE! Jamaica 9 Fiji 373

public class Simple. Thread extends Thread { int st; public Simple. Thread(String str) { super(str); } public void run() { for (int i = 0; i < 10; i++) { System. out. print(" "+ i + " " + get. Name()); try { st=(int) (Math. random() * 1000); System. out. println( " " + st); sleep(st); } catch (Interrupted. Exception e) { } } System. out. println("DONE! " + get. Name()); public class Two. Threads. Test { public static void main (String[] args) { new Simple. Thread("Jamaica"). start(); new Simple. Thread("Fiji "). start(); } } reference ref 1 reference ref 2 “Jamaica” “Fijir” ---------------- sleep run set. Name get. Name : : 0 Jamaica 401 0 Fiji 492 1 Jamaica 947 1 Fiji 937 2 Jamaica 97 2 Fiji 447 3 Jamaica 598 3 Fiji 986 4 Jamaica 699 5 Jamaica 164 4 Fiji 482 6 Jamaica 796 5 Fiji 144 6 Fiji 597 7 Jamaica 853 7 Fiji 522 8 Jamaica 152 8 Fiji 582 9 Jamaica 325 DONE! Jamaica 9 Fiji 373 DONE! Fiji

0 Jamaica 401 0 Fiji 492 1 Jamaica 947 1 Fiji 937 2 Jamaica 97 2 Fiji 447 3 Jamaica 598 3 Fiji 986 4 Jamaica 699 5 Jamaica 164 4 Fiji 482 6 Jamaica 796 5 Fiji 144 6 Fiji 597 7 Jamaica 853 7 Fiji 522 8 Jamaica 152 8 Fiji 582 9 Jamaica 325 DONE! Jamaica 9 Fiji 373 DONE! Fiji

Example -2

class Print. Thread extends Thread { private int sleep. Time; public Print. Thread( String name ) { super( name ); sleep. Time = (int) ( Math. random( ) * 50000 ); System. err. println( "Name: " + get. Name( ) + "; sleep: " + sleep. Time ); } public void run( ) { try { System. err. println( get. Name( ) + " going to sleep" ); Thread. sleep( sleep. Time ); } catch ( Interrupted. Exception interrupted. Exception ) { System. err. println( interrupted. Exception. to. String() ); } System. err. println( get. Name( ) + " done sleeping" ); } } public class Thread. Tester { public static void main( String args[] ) { Print. Thread thread 1, thread 2, thread 3, thread 4; thread 1 = new Print. Thread( "thread 1" ); thread 2 = new Print. Thread( "thread 2" ); thread 3 = new Print. Thread( "thread 3" ); thread 4 = new Print. Thread( "thread 4" ); System. err. println( "n. Starting threads" ); thread 1. start(); thread 2. start(); thread 3. start(); thread 4. start(); System. err. println( "Threads startedn" ); } } reference thread 1 “thread 1” Sleeptime=12708 --------sleep run set. Name get. Name :

class Print. Thread extends Thread { private int sleep. Time; public Print. Thread( String name ) { super( name ); sleep. Time = (int) ( Math. random( ) * 50000 ); System. err. println( "Name: " + get. Name( ) + "; sleep: " + sleep. Time ); } public void run( ) { try { System. err. println( get. Name( ) + " going to sleep" ); Thread. sleep( sleep. Time ); } catch ( Interrupted. Exception interrupted. Exception ) { System. err. println( interrupted. Exception. to. String() ); } System. err. println( get. Name( ) + " done sleeping" ); } } public class Thread. Tester { public static void main( String args[] ) { Print. Thread thread 1, thread 2, thread 3, thread 4; thread 1 = new Print. Thread( "thread 1" ); thread 2 = new Print. Thread( "thread 2" ); thread 3 = new Print. Thread( "thread 3" ); thread 4 = new Print. Thread( "thread 4" ); System. err. println( "n. Starting threads" ); thread 1. start(); thread 2. start(); thread 3. start(); thread 4. start(); System. err. println( "Threads startedn" ); } } reference thread 1 thread 2 “thread 1” “thread 2” Sleeptime=12708 Sleeptime=18411 ---------------- sleep run set. Name get. Name : :

class Print. Thread extends Thread { private int sleep. Time; public Print. Thread( String name ) { super( name ); sleep. Time = (int) ( Math. random( ) * 50000 ); System. err. println( "Name: " + get. Name( ) + "; sleep: " + sleep. Time ); } public void run( ) { try { System. err. println( get. Name( ) + " going to sleep" ); Thread. sleep( sleep. Time ); } catch ( Interrupted. Exception interrupted. Exception ) { System. err. println( interrupted. Exception. to. String() ); } System. err. println( get. Name( ) + " done sleeping" ); } } public class Thread. Tester { public static void main( String args[] ) { Print. Thread thread 1, thread 2, thread 3, thread 4; thread 1 = new Print. Thread( "thread 1" ); thread 2 = new Print. Thread( "thread 2" ); thread 3 = new Print. Thread( "thread 3" ); thread 4 = new Print. Thread( "thread 4" ); System. err. println( "n. Starting threads" ); thread 1. start(); thread 2. start(); thread 3. start(); thread 4. start(); System. err. println( "Threads startedn" ); } } reference thread 1 thread 2 “thread 1” “thread 2” Sleeptime=12708 Sleeptime=18411 ---------------- sleep run set. Name get. Name : : reference thread 3 “thread 3” Sleeptime=33617 --------sleep run set. Name get. Name :

class Print. Thread extends Thread { private int sleep. Time; public Print. Thread( String name ) { super( name ); sleep. Time = (int) ( Math. random( ) * 50000 ); System. err. println( "Name: " + get. Name( ) + "; sleep: " + sleep. Time ); } public void run( ) { try { System. err. println( get. Name( ) + " going to sleep" ); Thread. sleep( sleep. Time ); } catch ( Interrupted. Exception interrupted. Exception ) { System. err. println( interrupted. Exception. to. String() ); } System. err. println( get. Name( ) + " done sleeping" ); } } public class Thread. Tester { public static void main( String args[] ) { Print. Thread thread 1, thread 2, thread 3, thread 4; thread 1 = new Print. Thread( "thread 1" ); thread 2 = new Print. Thread( "thread 2" ); thread 3 = new Print. Thread( "thread 3" ); thread 4 = new Print. Thread( "thread 4" ); System. err. println( "n. Starting threads" ); thread 1. start(); thread 2. start(); thread 3. start(); thread 4. start(); System. err. println( "Threads startedn" ); } } reference thread 1 thread 2 “thread 1” “thread 2” Sleeptime=12708 Sleeptime=18411 ---------------- sleep run set. Name get. Name : : reference thread 3 reference thread 4 “thread 3” “thread 4” Sleeptime=33617 Sleeptime=15264 ---------------- sleep run set. Name get. Name : :

class Print. Thread extends Thread { private int sleep. Time; public Print. Thread( String name ) { super( name ); sleep. Time = (int) ( Math. random( ) * 50000 ); System. err. println( "Name: " + get. Name( ) + "; sleep: " + sleep. Time ); } public void run( ) Name: thread 1; { Name: thread 2; try { Name: thread 3; System. err. println( get. Name( ) + " going to sleep" ); Name: thread 4; Thread. sleep( sleep. Time ); } catch ( Interrupted. Exception interrupted. Exception ) Starting threads { System. err. println( interrupted. Exception. to. String() ); } System. err. println( get. Name( ) + " done sleeping" ); } } public class Thread. Tester { public static void main( String args[] ) { Print. Thread thread 1, thread 2, thread 3, thread 4; thread 1 = new Print. Thread( "thread 1" ); thread 2 = new Print. Thread( "thread 2" ); thread 3 = new Print. Thread( "thread 3" ); thread 4 = new Print. Thread( "thread 4" ); System. err. println( "n. Starting threads" ); thread 1. start(); thread 2. start(); thread 3. start(); thread 4. start(); System. err. println( "Threads startedn" ); } } sleep: 12708 18411 33617 15264

class Print. Thread extends Thread { private int sleep. Time; public Print. Thread( String name ) { super( name ); sleep. Time = (int) ( Math. random( ) * 50000 ); System. err. println( "Name: " + get. Name( ) + "; sleep: " + sleep. Time ); } public void run( ) Name: thread 1; sleep: { Name: thread 2; sleep: try { Name: thread 3; sleep: System. err. println( get. Name( ) + " going to sleep" ); Name: thread 4; sleep: Thread. sleep( sleep. Time ); } catch ( Interrupted. Exception interrupted. Exception ) Starting threads { System. err. println( interrupted. Exception. to. String() ); } thread 1 going to sleep System. err. println( get. Name( ) + " done sleeping" ); Threads started } } public class Thread. Tester { public static void main( String args[] ) { Print. Thread thread 1, thread 2, thread 3, thread 4; thread 1 = new Print. Thread( "thread 1" ); thread 2 = new Print. Thread( "thread 2" ); thread 3 = new Print. Thread( "thread 3" ); thread 4 = new Print. Thread( "thread 4" ); System. err. println( "n. Starting threads" ); thread 1. start(); thread 2. start(); thread 3. start(); thread 4. start(); System. err. println( "Threads startedn" ); } } thread 2 going to sleep thread 3 going to sleep thread 4 going to sleep 12708 18411 33617 15264

class Print. Thread extends Thread { private int sleep. Time; public Print. Thread( String name ) { super( name ); sleep. Time = (int) ( Math. random( ) * 50000 ); System. err. println( "Name: " + get. Name( ) + "; sleep: " + sleep. Time ); } public void run( ) Name: thread 1; sleep: { Name: thread 2; sleep: try { Name: thread 3; sleep: System. err. println( get. Name( ) + " going to sleep" ); Name: thread 4; sleep: Thread. sleep( sleep. Time ); } catch ( Interrupted. Exception interrupted. Exception ) Starting threads { System. err. println( interrupted. Exception. to. String() ); } thread 1 going to sleep System. err. println( get. Name( ) + " done sleeping" ); Threads started } } public class Thread. Tester { public static void main( String args[] ) { Print. Thread thread 1, thread 2, thread 3, thread 4; thread 1 = new Print. Thread( "thread 1" ); thread 2 = new Print. Thread( "thread 2" ); thread 3 = new Print. Thread( "thread 3" ); thread 4 = new Print. Thread( "thread 4" ); System. err. println( "n. Starting threads" ); thread 1. start(); thread 2. start(); thread 3. start(); thread 4. start(); System. err. println( "Threads startedn" ); } } thread 2 going to sleep thread 3 going to sleep thread 4 going to sleep thread 1 thread 4 thread 2 thread 3 done sleeping 12708 18411 33617 15264

Example -3

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell -1 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 0 sum 2498 1094 Consumer retrieving shared. Int Producer setting shared. Int to Producer setting shared. Int to Consumer retrieving shared. Int Producer setting shared. Int to finished producing values Terminating Producer value value value -1 1 1 2 2 3 4 4 5 5 6 6 7 8 8 8 9 9 10 Consumer retrieving shared. Int value retrieved values totaling: 52 Terminating Consumer 1727 1202 2582 2822 2681 1334 1760 2825 2032 950 526 1400 657 1200 180 796 1123 2902 Producer 10 Consumer

reference s. Object reference shared. Int=-1 -------- reference p set. Shsre. Int get. Shrae. Int “Producer” s. Object c --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : public class Shared. Cell { public static void main( String args[] ) { Unsyn s. Object = new Unsyn(); Producer p = new Producer( s. Object ); Consumer c= new Consumer( s. Object ); p. start(); c. start(); } }

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int s. Object c --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell -1 public class Producer extends Thread { private Unsync s. Object; public Producer( Unsyn s ) { super( "Producer" ); s. Object = s; } public void run() { for ( int count = 1; count <= 10; count++ ) { try { Thread. sleep( ( int ) ( Math. random() * 3000 ) ); } catch( Interrupted. Exception exception ) { System. err. println( exception. to. String() ); } s. Object. set. Shared. Int( count ); } System. err. println(get. Name() + " finished producing values" + "n. Terminating " + get. Name() ); Thread (p) } for count=1 to 10 } { sleeping random time and each time put set. Shsre. Int=count } p. start();

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell -1 Thread (p) Thread (c) for public class Consumer extends Thread { private Unsyn s. Object; public Consumer( Unsyn s) { super( "Consumer" ); s. Object = s; } public void run() { int value, sum = 0; do { try { Thread. sleep( (int) ( Math. random() * 3000 ) ); } catch( Interrupted. Exception exception ) { System. err. println( exception. to. String() ); } value = s. Object. get. Shared. Int(); sum += value; } while ( value != 10 ); System. err. println( get. Name() + " retrieved values totaling: “ + sum + "n. Terminating " + get. Name() ); } } do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 0 sum c. start();

public class Unsyn { private int shared. Int = -1; public void set. Shared. Int( int value ) { System. err. println( Thread. current. Thread(). get. Name() + " setting shared. Int to " + value ); shared. Int = value; } public int get. Shared. Int() { System. err. println( Thread. current. Thread(). get. Name() + " retrieving shared. Int value " + shared. Int ); return shared. Int; } }

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell -1 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) -1 sum 2498 1094 Consumer retrieving shared. Int value -1 1727

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 1 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) -1 sum 2498 1094 Consumer retrieving shared. Int value Producer setting shared. Int to -1 1 1727 1202

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 1 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 0 sum 2498 1094 Consumer retrieving shared. Int value Producer setting shared. Int to Consumer retrieving shared. Int value -1 1 1 1727 1202 2582

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 2 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 0 sum 2498 1094 Consumer retrieving shared. Int value Producer setting shared. Int to -1 1 1 2 1727 1202 2582 2822

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 2 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 2 sum 2498 1094 Consumer retrieving shared. Int value Producer setting shared. Int to Consumer retrieving shared. Int value -1 1 1 2 2 1727 1202 2582 2822 2681

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 3 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 2 sum 2498 1094 Consumer retrieving shared. Int value Producer setting shared. Int to -1 1 1 2 2 3 1727 1202 2582 2822 2681 1334

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 4 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 2 sum 2498 1094 Consumer retrieving shared. Int value Producer setting shared. Int to -1 1 1 2 2 3 4 1727 1202 2582 2822 2681 1334 1760

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 4 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 6 sum 2498 1094 Consumer retrieving shared. Int Producer setting shared. Int to Consumer retrieving shared. Int value -1 1 1 2 2 3 4 4 1727 1202 2582 2822 2681 1334 1760 2825

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 5 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 6 sum 2498 1094 Consumer retrieving shared. Int Producer setting shared. Int to value -1 1 1 2 2 3 4 4 5 1727 1202 2582 2822 2681 1334 1760 2825 2032

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 5 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 11 sum 2498 1094 Consumer retrieving shared. Int Producer setting shared. Int to Consumer retrieving shared. Int value value -1 1 1 2 2 3 4 4 5 5 1727 1202 2582 2822 2681 1334 1760 2825 2032 950

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 6 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 11 sum 2498 1094 Consumer retrieving shared. Int Producer setting shared. Int to value value -1 1 1 2 2 3 4 4 5 5 6 1727 1202 2582 2822 2681 1334 1760 2825 2032 950 526

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 6 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 17 sum 2498 1094 Consumer retrieving shared. Int Producer setting shared. Int to Consumer retrieving shared. Int value value -1 1 1 2 2 3 4 4 5 5 6 6 1727 1202 2582 2822 2681 1334 1760 2825 2032 950 526 1400

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 7 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 17 sum 2498 1094 Consumer retrieving shared. Int Producer setting shared. Int to Consumer retrieving shared. Int Producer setting shared. Int to value value -1 1 1 2 2 3 4 4 5 5 6 6 7 1727 1202 2582 2822 2681 1334 1760 2825 2032 950 526 1400 657

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 8 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 17 sum 2498 1094 Consumer retrieving shared. Int Producer setting shared. Int to Producer setting shared. Int to value value -1 1 1 2 2 3 4 4 5 5 6 6 7 8 1727 1202 2582 2822 2681 1334 1760 2825 2032 950 526 1400 657 1200

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 8 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 25 sum 2498 1094 Consumer retrieving shared. Int Producer setting shared. Int to Producer setting shared. Int to Consumer retrieving shared. Int value value -1 1 1 2 2 3 4 4 5 5 6 6 7 8 8 1727 1202 2582 2822 2681 1334 1760 2825 2032 950 526 1400 657 1200 180

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 8 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 33 sum 2498 1094 Consumer retrieving shared. Int Producer setting shared. Int to Producer setting shared. Int to Consumer retrieving shared. Int value value -1 1 1 2 2 3 4 4 5 5 6 6 7 8 8 8 1727 1202 2582 2822 2681 1334 1760 2825 2032 950 526 1400 657 1200 180 796

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 9 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 33 sum 2498 1094 Consumer retrieving shared. Int Producer setting shared. Int to Producer setting shared. Int to Consumer retrieving shared. Int Producer setting shared. Int to value value -1 1 1 2 2 3 4 4 5 5 6 6 7 8 8 8 9 1727 1202 2582 2822 2681 1334 1760 2825 2032 950 526 1400 657 1200 180 796 1123

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 9 Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 42 sum 2498 1094 Consumer retrieving shared. Int Producer setting shared. Int to Producer setting shared. Int to Consumer retrieving shared. Int value value value -1 1 1 2 2 3 4 4 5 5 6 6 7 8 8 8 9 9 1727 1202 2582 2822 2681 1334 1760 2825 2032 950 526 1400 657 1200 180 796 1123 2902

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 10 Producer setting shared. Int to finished producing values Terminating Producer Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 42 sum 2498 1094 Consumer retrieving shared. Int Producer setting shared. Int to Producer setting shared. Int to Consumer retrieving shared. Int value value value 10 -1 1 1 2 2 3 4 4 5 5 6 6 7 8 8 8 9 9 1727 1202 2582 2822 2681 1334 1760 2825 2032 950 526 1400 657 1200 180 796 1123 2902 Producer

reference s. Object reference shared. Int=-1 reference p --------set. Shsre. Int “Producer” get. Shrae. Int c s. Object --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell 10 Producer setting shared. Int to finished producing values Terminating Producer Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time put set. Shsre. Int=count } value=get. Shsre. Int } While (value!=10) 52 sum 2498 1094 Consumer retrieving shared. Int Producer setting shared. Int to Producer setting shared. Int to Consumer retrieving shared. Int value value value -1 1 1 2 2 3 4 4 5 5 6 6 7 8 8 8 9 9 10 Consumer retrieving shared. Int value retrieved values totaling: 52 Terminating Consumer 1727 1202 2582 2822 2681 1334 1760 2825 2032 950 526 1400 657 1200 180 796 1123 2902 Producer 10 Consumer

2498 1094 Consumer retrieving shared. Int Producer setting shared. Int to Producer setting shared. Int to Consumer retrieving shared. Int Producer setting shared. Int to finished producing values Terminating Producer value value value -1 1 1 2 2 3 4 4 5 5 6 6 7 8 8 8 9 9 10 Consumer retrieving shared. Int value retrieved values totaling: 52 Terminating Consumer 1727 1202 2582 2822 2681 1334 1760 2825 2032 950 526 1400 657 1200 180 796 1123 2902 Producer 10 Consumer

Example -4

reference s. Object reference shared. Int=-1 reference p Writeable=true --------set. Shsre. Int “Producer” get. Shrae. Int s. Object c --------sleep “Consumer” run s. Object set. Name -------- get. Name sleep : run set. Name get. Name : sharedcell -1 writeablel true Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time and set. Shsre. Int=count } value=get. Shsre. Int } sum 0 While (value!=10)

T sleep P : 2784 reference s. Object and T sleep C : 388 reference shared. Int=-1 Writeable=true p Two threads begin to run and going to sleep deferent times 2784 and 388 --------set. Shsre. Int “Producer” get. Shrae. Int s. Object c “Consumer” --------sleep s. Object run -------- set. Name sleep get. Name run : set. Name Thread ( c ) first wake-up Calling get. Shared. Int get. Name : Synchronized get. Shared. Int running sharedcell -1 if (Writeable=true) -> watting to become T sleep P=2784 writeablel true Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time and value=get. Shsred. Int } set. Shsred. Int=coun t} While (value!=10) sum 0

T sleep P : 2784 and T sleep C : 388 Producer setting shared. Int to 1 reference s. Object reference shared. Int=-1 Writeable=true p Two threads begin to run and going to sleep deferent times 2784 and 388 --------set. Shsre. Int “Producer” get. Shrae. Int s. Object c “Consumer” --------sleep s. Object run -------- set. Name sleep get. Name run : set. Name Thread ( c ) first wake-up Calling get. Shared. Int get. Name : Synchronized get. Shared. Int running sharedcell 1 if (Writeable=true) -> watting to become T sleep P=2784 writeablel false Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time and value=get. Shsred. Int } set. Shsred. Int=coun t} While (value!=10) sum 0 thread ( p) wake-up ( shared. Int=1) (sharedcell=1) Put ( Writeable=false ) Notify thread (c) become ready

reference s. Object reference shared. Int=-1 Writeable=true T sleep P : 2784 and T sleep C : 388 Producer setting shared. Int to 1 Consumer retrieving shared. Int value 1 p --------set. Shsre. Int “Producer” get. Shrae. Int s. Object c “Consumer” --------sleep s. Object run -------- set. Name sleep get. Name run : set. Name Thread ( c ) running Calling get. Shared. Int get. Name : Synchronized get. Shared. Int running sharedcell 1 Writeable=true writeablel value = shared. Object. get. Shared. Int() sum += value true Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time and value=get. Shsred. Int } set. Shsred. Int=coun t} While (value!=10) sum 1

reference s. Object reference shared. Int=-1 Writeable=true p T sleep P : 2784 and T sleep C : 388 Producer setting shared. Int to 1 Consumer retrieving shared. Int value 1 T sleep C : 792 T sleep P : 96 and Producer setting shared. Int to 2 --------set. Shsre. Int “Producer” get. Shrae. Int s. Object c “Consumer” --------sleep s. Object run -------- set. Name sleep get. Name run : set. Name get. Name : sharedcell 2 writeablel false Thread (p) Thread (c) for do count=1 to 10 { { sleeping random time and each time and value=get. Shsred. Int } set. Shsred. Int=coun t} While (value!=10) sum 1 Two threads begin to run again and going to sleep deferent times 96 and 792 thread ( p) wake-up ( shared. Int=2) (sharedcell=2) Put ( Writeable=false ) Notify thread (c) become ready

T sleep P : 2784 and T sleep C : 388 Producer setting shared. Int to 1 Consumer retrieving shared. Int value 1 T sleep C : 792 T sleep P : 96 and Producer setting shared. Int to 2 T sleep P : 559 and Consumer retrieving shared. Int value 2 T sleep C : 1122 Producer setting shared. Int to 3 T sleep P : 192 and Consumer retrieving shared. Int value 3 Producer setting shared. Int to 4 T sleep P : 1545 and T sleep C : 2224 Consumer retrieving shared. Int value 4 Producer setting shared. Int to 5 T sleep P : 2122 and T sleep C : 1349 Consumer retrieving shared. Int value 5 T sleep C : 2886 Producer setting shared. Int to 6 T sleep P : 1869 and Consumer retrieving shared. Int value 6 Producer setting shared. Int to 7 T sleep P : 185 and T sleep C : 665 Consumer retrieving shared. Int value 7 T sleep C : 375 Producer setting shared. Int to 8 T sleep P : 2157 and Consumer retrieving shared. Int value 8 T sleep C : 1061 Producer setting shared. Int to 9 Consumer retrieving shared. Int value 9 T sleep C : 2731 T sleep P : 1365 and Producer setting shared. Int to 10 Producer finished producing values Terminating Producer Consumer retrieving shared. Int value 10 Consumer retrieved values totaling: 55 Terminating Consumer