No Reference Parameters

• Java has no "call by reference"

• public void copyLengthTo(int n)
  {
   n = name.length(); 
  } 
  public void copyGreeterTo(Greeter other)
  {
   other = new Greeter(name);
  }
  

• Neither call has any effect after the method returns
  

  int length = 0;
  worldGreeter.copyLengthTo(length); // length still 0
  worldGreeter.copyGreeterTo(daveGreeter) // daveGreeter unchanged