Java Fundamentals 3 Input and Output statements Standard

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Java Fundamentals 3 Input and Output statements

Java Fundamentals 3 Input and Output statements

Standard Output Window Using System. out, we can output multiple lines of text to

Standard Output Window Using System. out, we can output multiple lines of text to the standard output window. • The exact style of standard output window depends on the Java tool you use. Introduction to OOP Dr. S. GANNOUNI & Dr. A. TOUIR Page 2

The println Method We use println instead of print to skip a line. int

The println Method We use println instead of print to skip a line. int x = 123, y = x + x; System. out. print( " x = “ ); System. out. println( x ); System. out. print( " x + x = “ ); System. out. println( y ); System. out. println( " THE END“ ); x = 123 x + x = 246 THE END Introduction to OOP Dr. S. GANNOUNI & Dr. A. TOUIR Page 3

Standard Input To input primitive data values, we use the Scanner class. 4 steps

Standard Input To input primitive data values, we use the Scanner class. 4 steps are needed to be able to use input primitive: Step 1: import the Scanner class: • import Java. util. Scanner; Step 2 : declaring a reference variable of a Scanner • Scanner read ; //we named the object read Step 3: creating an instance of the Scanner • read = new Scanner (System. in); Step 4: use specific methods to enter data • int x = read. next. Int(); Introduction to OOP Dr. S. GANNOUNI & Dr. A. TOUIR Page 4

import java. util. Scanner; Example public class Test. Input { public static void main(String[]

import java. util. Scanner; Example public class Test. Input { public static void main(String[] args) { Scanner input ; int area , length, width; input = new Scanner (System. in); // creating an instance System. out. println("enter the length "); length = input. next. Int(); //reading the length from the keyboard System. out. println("Enter the Width "); width = input. next. Int(); //reading the width from the keyboard area = length * width ; System. out. println("the length is "+ length); System. out. println("the width is "+ width); System. out. println("the area is "+ area); } } Introduction to OOP Dr. S. GANNOUNI & Dr. A. TOUIR Page 5

Output enter the length 2 Enter the Width 3 the length is 2 the

Output enter the length 2 Enter the Width 3 the length is 2 the width is 3 the area is 6 Introduction to OOP Dr. S. GANNOUNI & Dr. A. TOUIR Page 6

Common Scanner Methods Method Example Scanner input = new Scanner (System. in); next. Byte(

Common Scanner Methods Method Example Scanner input = new Scanner (System. in); next. Byte( ) byte b = input. next. Byte( ); next. Double( ) double d = input. next. Double( ); next. Float( )float f = input. next. Float( ); next. Int( ) int i = input. next. Int( ); next. Long( )long l = input. next. Long( ); next. Short( ) short s = input. next. Short( ); next() String str = input. next(); Introduction to OOP Dr. S. GANNOUNI & Dr. A. TOUIR Page 7

INPUT OUTPUT STATEMENTS Input Statements These statements transferINPUT OUTPUT STATEMENTS Input Statements These statements transfer
Pemrograman Terstruktur INPUT OUTPUT Input Output OUTPUT FungsiPemrograman Terstruktur INPUT OUTPUT Input Output OUTPUT Fungsi
Input and Output Statements Overview Input statements MenuInput and Output Statements Overview Input statements Menu
INPUT OUTPUT DEVICE INPUT OUTPUT HARDWRE Input hardwareINPUT OUTPUT DEVICE INPUT OUTPUT HARDWRE Input hardware
Input Output INPUT A INPUT B CAB OUTPUTInput Output INPUT A INPUT B CAB OUTPUT
Chapter 2 Java Fundamentals Input and Output statementsChapter 2 Java Fundamentals Input and Output statements