I want to extend a JPanel

Question

I have created a panel namely xyz.java which includes two combo boxes. I need another panel which has three combo boxes. Two of the combo boxes are same as that of xyz.java. I want to extend xyz.java by creating extendedxyz.java.
Can any one help me in this regard.
Thanks.

Answer 1

Rough example for what you'd like to know:
class Xyz extends JPanel {
  public Xyz() {
    add(new JComboBox());
    add(new JComboBox());
class ExtendedXyz extends Xyz {
  public ExtendedXyz() {
    add(new JComboBox());
}Though I'm not sure whether inheritation is a good approach for what you want to achieve. Instead, you could just add an instance of Xyz as a sub-component of panel ExtendedXyz.