Consider the following method that is intended to swap the v

Consider the following method that is intended to swap the values or two integers: public static void falseSwap(int a, int b) {int temp = a; a = b; b = temp;} public static void main(String[] args) {int x = 3; int y = 4; falseSwap(x, y); System.out.println(x + \" \" + y);} Why doesn\'t the falseSwap method swap the contents of x and y?

Solution

public static void falseSwap(int a, int b){
  
   int temp = a;
   a = b;
   b = temp;
}

public static void main(String[] args){
  
   int x = 3;
   int y = 4;
   falseSwap(x, y);
   System.out.println(x+\" \"+y);
}

I java, we have PASS BY VALUE only,

so when we call: falseSwap(x, y) : It passes the values of x and
                       y to method falseSwap. So if you do anything
                       with these values in falseSwap metho, it will not affect the original value in main method