public class Test {

    static classB {

       public int i = 0;

       public String s = "0";

    }

    publicstatic void main(String[] args) {

       int i = 0;

       change1(i);

       System.out.println(i);                         //0

       String a = "0";

       change2(a);

       System.out.println(a);                         //0

       B b1 = new B();

       change3(b1);

       System.out.println(b1.i + "   " +b1.s);       //100 100

       B b2 = new B();

       change4(b2);

       System.out.println(b2.i + "   " +b2.s);       //0 0

        

       int[] c1 = new int[]{0};

       change5(c1);

       System.out.println(c1[0]);                     //100

        

       int[] c2 = new int[]{0};