Adding a JPanel manually in NetBeans 7.1

Question

I am trying to add a JPanel manually to a JPanel that was created via the Graphic Designer. Since i can't edit in the Generated code i have no idea if i can do that.

private void jMenuItem2ActionPerformed(java.awt.event.ActionEvent evt) {
     newBall2 = new BasketBall("BasketBall",20,400);
     MainpaintPanel mp = new MainpaintPanel();
     this.add(mp);
}

in this code the mp Panel is created successfully but it doesn't show where it's added. i think it's related to the default Layout of the netBeans but it could be something else.

Thanks in Advance.

Answer 1

您也可以尝试使用面板的“ .setVisible（true）”和“ setLocationRelativeTo（component c）”方法