Java optional parameters

Question

How do I use optional parameters in Java? What specification supports optional parameters?

Answer 1

Overloading is fine, but if there's a lot of variables that needs default value, you will end up with :

public void methodA(A arg1) {  }
public void methodA( B arg2,) {  }
public void methodA(C arg3) {  }
public void methodA(A arg1, B arg2) {  }
public void methodA(A arg1, C arg3) {  }
public void methodA( B arg2, C arg3) {  }
public void methodA(A arg1, B arg2, C arg3) {  }

So I would suggest use the Variable Argument provided by Java. Here's a link for explanation.