Is Java pass by value or pass by reference?

What are good implementation for swap() method in Java(pass by reference)?

• void swap(int a,int b) I try to implement this method in Java,never works,how to pass by reference in Java

• Answer:

  The easiest way to pass by reference is to put the parameters in an array, and pass the array. So your method would look something like: void swap(int[] ab) {   int temp = ab[0];   ab[0] = ab[1];   ab[1] = temp; } You can't do this with a method signature of swap(int a, int b) because by definition, that's pass-by-value.