How advantages of "Call By Reference" can be implemented using Java

Question

As I know that java doesnot support "Call By Reference" as C++
does.
I want to know that how advantages of Call by Reference can be
implemented using Java.

Answer 1

There is some misunderstanding here. Method arguments in Java are passed by value. However, if you pass a reference (to an object) by value, you can still modify the object that the (copy of the) reference points to.
public void method1() {
  StringBuffer buf = new StringBuffer();
  // Here, method2 cannot change the value of the variable buf,
  // but it can modify the object that buf points to.
  method2(buf);
public void method2(StringBuffer sb) {
  // You can modify the StringBuffer.
  sb.append("hello");
  // But this is useless, it will not change the variable buf
  // in the calling method.
  sb = new StringBuffer();
}Jesper