Question

I was just discussing with some colleagues about Java constructors, design-patterns and good way to initialize objects with a unparametrized constructor if I normally await some parameters.

One of the older ones came up with his way of implementing always something like:

public class Foo {

public Foo() {
this(0,0,0);
}

public Foo(int a, int b, int c) {
this.a = a;
this.b = b;
this.c = c;
}
..
}

My question is, is that good style and what is its behaviour exactly?

From what I understand should be:

• it instantiates first an Object and then calling the parametrized constructor to construct a new object of that type with that parameter settings and set its own reference to the new one. So the GC has then to delete the first created one.

Answer 1

So the GC has then to delete the first created one.

No. Only 1 instance is ever created when chaining constructors.

To answer your question, yes, it’s good style, assuming you need both foo() and foo(int, int, int)