Call by reference program in java

package org.learn.callbyreference;

public class CallByReferenceTest {

    String val = new String("Test");

    public static void main(String[] args) {
        CallByReferenceTest cTest = new CallByReferenceTest();
       
         String s= new String("test this string");
         cTest.changeString(s);
         System.out.println(s);
        

        System.out.println(cTest.val);
        cTest.chagngeVal("Test1111");
        System.out.println(cTest.val);

    }

    public void changeString(String s) {
        s = "test 89898989";
    }

    public void chagngeVal(String s) {
        val = "Test43323243242";
    }

}