Question

How to swap two arrays without using temporary variable in Java

Answer 1

public class MyClass {
    public static void main(String args[]) {
        int[] first = {1, 2, 3, 4, 5} , second = {99, 88, 77, 66, 55};
        int size = first.length;
         
        for (int i = 0; i < size; i++) {
            first[i] = first[i] + second[i];
            second[i] = first[i] - second[i];
            first[i] = first[i] - second[i];
        }
        
        System.out.println("First");
        for (int i = 0; i < size; i ++) {
            System.out.print(first[i] + " ");
        }
        
        System.out.println("\nSecond");
        for (int i = 0; i < size; i ++) {
           System.out.print(second[i] + " ");
        }
    }
}
 
 
 
 
 
/*
run:
 
First
99 88 77 66 55 
Second
1 2 3 4 5 
 
*/

 

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