点击按钮之后,面板不会qie'h
public class ADD {
public static void main(String[] args) {
// TODO Auto-generated method stub
JPanel b=new JPanel();
Frame a=new Frame("..");
ActionListener d=new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
b.setOpaque(false);
Jpanel B=new Jpanel();
a.add(B);
}
};
a.add(b);
JButton c=new JButton("123");
c.addActionListener(d);
b.add(c);
a.setVisible(true);
a.setBounds(200, 200,200,200);
}
}
import java.awt.*;
import javax.swing.JButton;
import javax.swing.JPanel;
public class Jpanel extends JPanel{
@Override
public void setBackground(Color bg) {
// TODO Auto-generated method stub
super.setBackground(Color.blue);
}
}