do a swap in java code example

Example 1: swap function java

public static void swap(int[] a, int i, int j){
	int temp = a[i];
  	a[i] = a[j];
  	a[j] = temp;
}

Example 2: java swap variables

// a, b can be a numeric value
a += b; // a = a + b
b = a - b; // b = (a + b) - b = a  ---> b=a
a -= b; // a = (a + b) - (a) = b  ---> a=b