Lecture 8 Methods JAVA PROGRAMMING KANIDA SINMAI What

Lecture 8 Methods JAVA PROGRAMMING KANIDA SINMAI

What is a method? A Java method is a collection of statements that are grouped together to perform an operation. For example System. out. println method Math. pow method

Class methods consist of 1. A main (driver) method 2. Other methods that are called from the main method Methods can be qualified as public or private

Creating Method: Parameterless Method public class Parameterless { public static void main(String[] args) { title(); Calling the method title } private static void title(){ System. out. println("*************"); System. out. println("******* H E L L O ****"); System. out. println("*************"); } } private static: Modifier void: no return variable title: method name (): no parameter

Creating Method: Parameter Method public class Indonesian { public static void main(String[] args) { System. out. println("One in Indonesian is "); to. Indonesian(1); System. out. println("Two in Indonesian is "); to. Indonesian(2); System. out. println("Three in Indonesian is "); to. Indonesian(3); System. out. println("Four in Indonesian is "); to. Indonesian(4); } private static void to. Indonesian(int i) { switch (i) { case 1: System. out. println("satu"); break; case 2: System. out. println("dua"); break; case 3: System. out. println("tiga"); break; case 4: System. out. println("empat"); break; default: System. out. println("unknown"); break; } private static: Modifier } void: no return variable to. Indonesain: method name (int i): a parameter

Creating Method: Parameter Method public class Parameter { public static void main(String[] args) { System. out. print(abs(-9)); } //end of main method private static int abs(int x){ if(x<0) return -x; else return x; } //end of abs method } //end of clase private static: Modifier int: return type abs: method name (int x): parameter

Creating Method: Multi Parameters Method public class Parameter { public static void main(String[] args) { int min = min. Function(5, 9); System. out. print(min); } public static int min. Function(int n 1, int n 2) { int min; if (n 1 > n 2) min = n 2; else min = n 1; return min; } }