Question

To illustrate:

public class FooButton extends JButton {
    protected Integer length = 30;

    public FooButton(String txt) {
        setText(txt);
    }

    @Override
    public void setText(String txt) {
        super.setText(txt.substring(0, length));
    }
}

Unfortunatly for me, Eclipse tells me that length is null while passing through setText().

Answer 1

Shouldn’t it be:

protected int length = 30;