Java通过引用调用

public class Tester {

   public static void main(String[] args) {

      int a = 30;

      int b = 45;

      System.out.println("Before swapping, a = " + a + " and b = " + b);



      // Invoke the swap method

      swapFunction(a, b);

      System.out.println("\n**Now, Before and After swapping values will be same here**:");

      System.out.println("After swapping, a = " + a + " and b is " + b);

   }

   public static void swapFunction(int a, int b) {

      System.out.println("Before swapping(Inside), a = " + a + " b = " + b);



      // Swap n1 with n2

      int c = a;

      a = b;

      b = c;

      System.out.println("After swapping(Inside), a = " + a + " b = " + b);

   }

}