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Methods in Java

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Example 1

class Example{
public static void main(String args[]){
System.out.println("John");
System.out.println("Peter");
print(); // Method Calling statement
System.out.println("Anne");
System.out.println("James");
print();
System.out.println("Steve");
System.out.println("Jim");
print();
}
public static void print(){ // Method Declaration
System.out.println("=======");
}
}

Output

John
Peter
=======
Anne
James
=======
Steve
Jim
=======

Example 2

import java.util.*;
class Example{
public static void calculator(){
Scanner input = new Scanner(System.in);
System.out.println();
System.out.print("Enter Number 1 : ");
int number1 = input.nextInt();
System.out.print("Enter Number 2 : ");
int number2 = input.nextInt();
System.out.println();
System.out.println("Total : " + (number1 + number2));
System.out.println();
}
public static void main(String args[]){
System.out.println("Start.....");
calculator();
System.out.println("End.....");
}
}

Output

Start…..

Enter Number 1 : 45
Enter Number 2 : 67

Total : 112

End…..

Parameterized Method

class Example{
public static void print(String text,int number){ // Parameter --> Parameterized Method
System.out.println("Your Text : " + text);
System.out.println("Your Number : " + number);
}
public static void main(String args[]){
print("Hello Java",10); // Argument
}
}

Output

F:\javas>java Example
Your Text : Hello Java
Your Number : 10

class Example{
public static void main(String args[]){
int[] arr = {10,20,30,40,50};
for(int i = 0 ; i < arr.length ; i++){
System.out.print(arr[i] + " ");
}
System.out.println();
addFive(arr);
for(int i = 0 ; i < arr.length ; i++){
System.out.print(arr[i] + " ");
}
}
public static void addFive(int[] numbers){
for(int i = 0 ; i < numbers.length ; i++){
numbers[i] = numbers[i] + 5;
}
}
}

Output

10 20 30 40 50
15 25 35 45 55

 

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