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

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