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Java Reverse Array

Submitted by Deepthi on Sat, 11/13/2010 - 18:34

Write a Java program to reverse an array without creating another array.

//Java Reverse Array
public class JavaReverseArray {
    
    public static void main(String args[]){
       
        //declare an array
        int[] numbers = {1,2,3,4,5};
       
        System.out.println("Java array before reverse");
        for(int i=0; i < numbers.length ; i++){
            System.out.print(numbers[i] + " ");
        }
       
        System.out.println("");
       
        int temp = 0 ;
        for(int start=0, end = numbers.length -1 ; start < end; start++, end--){
            //swap numbers
            temp = numbers[start];
            numbers[start] = numbers[end];
            numbers[end] = temp;
        }
       
        System.out.println("Java Array Reversed");
        for(int i=0; i < numbers.length ; i++){
            System.out.print(numbers[i] + " ");
        }
    }
}
 
/*
Output of above given Java Array Reverse example would be
Java array before reverse
1 2 3 4 5
Java Array Reversed
5 4 3 2 1
*/