Having a class itself as its constructor's only parameter

Question

public class Foo{
    private String a;
    private int b;

    public Foo(Foo foo){
        this.a = foo.a;
        this.b = foo.b;
    }
}

Hi eve

Answer 1

There is nothing wrong with your code. Actually what you did has a name: copy constructor And it is very convenient way to make o copy of another object. (assuming you have some other way to create instance of it besides this constructor )