[douglasv]

In the “New Java Class” dialog

in the section “Which stub would you like to create” I always check “Constructors for Super Class’

and myeclipse Always “NEVER” creates the “Super Class Constructor” , why then the need for a check box
for something that doesn’t Work????

[Riyad Kalla]

Please give me details to try and reproduce on my end. For example, which class are you marking as the super class? I will see if I can figure out what is going on.

[douglasv]

@support-rkalla wrote:

Please give me details to try and reproduce on my end. For example, which class are you marking as the super class? I will see if I can figure out what is going on.

this all occurs in the new class dialog, super() .class that will be created from is “java.lang.Object

[Riyad Kalla]

douglasv,
I think there may be a misunderstanding, what that feature does is create constructors in your new class that *match* the ones in the super class. The only constructor that Object has is the default no-arg constructor, so there is no constructor to create.

Try doing the same thing using JButton as the parent class, the wizard will correctly generate all 5 constructors from the parent JButton class, like this:

public TestButton() {
    }

    public TestButton(Icon icon) {
        super(icon);
    }

    public TestButton(String text) {
        super(text);
    }

    public TestButton(Action a) {
        super(a);
    }

    public TestButton(String text, Icon icon) {
        super(text, icon);
    }

[douglasv]

@support-rkalla wrote:

douglasv,
I think there may be a misunderstanding, what that feature does is create constructors in your new class that *match* the ones in the super class. The only constructor that Object has is the default no-arg constructor, so there is no constructor to create.

Try doing the same thing using JButton as the parent class, the wizard will correctly generate all 5 constructors from the parent JButton class, like this:

public TestButton() {
    }

    public TestButton(Icon icon) {
        super(icon);
    }

    public TestButton(String text) {
        super(text);
    }

    public TestButton(Action a) {
        super(a);
    }

    public TestButton(String text, Icon icon) {
        super(text, icon);
    }

On eclipse I believe you will get :-” super();”- in the default constructor; at least that’s what others get

[Riyad Kalla]

In that use-case super() is an implicit call, whether you type it or not it will be invoked by the VM. Try it, create a base class that in it’s default constructor prints “Hello!” and then in the subclass print out “World” in it’s default constructor. You will get Hello World.

[Author]

Posts