java - Using multiple JPanels in a single JFrame -

i've been trying make menu game using jframe , switching out 2 jpanels (one menu , 1 actual game). i'm trying implement basic format can think of can't seem work. if explain what's wrong code appreciate it.

here's jframe, menu panel, , actionlistener

package buttonmenu;  import java.awt.borderlayout; import java.awt.button; import java.awt.color; import java.awt.event.actionevent; import java.awt.event.actionlistener;  import javax.swing.jbutton; import javax.swing.jframe; import javax.swing.jpanel;  public class skeleton extends jframe implements actionlistener{  jpanel menu; jbutton button;  public skeleton(){  setdefaultcloseoperation(exit_on_close); setsize(400, 400); setvisible(true);  menu = new jpanel(); button = new jbutton("button");  menu.setsize(400, 400); menu.setbackground(color.black); menu.setvisible(true); menu.add(button);  button.setlocation(200, 200); button.addactionlistener(this);  add(menu, borderlayout.center);  }  public void actionperformed(actionevent a){     jpanel panel = game.game();     this.remove(menu);     this.add(panel);    }  public static void main(string args[]){     new skeleton(); } } 

the actionperformed calls panel created in class

package buttonmenu; import java.awt.color; import javax.swing.jpanel; public class game{  public static jpanel game(){     jpanel panel = new jpanel();     panel.setsize(400, 400);     panel.setbackground(color.white);     return panel;        }  } 

again, if explain me what's wrong code appreciate it. thanks

when adding/removing components, need revalidate parent container force relay out...

public void actionperformed(actionevent a){     jpanel panel = game.game();     this.remove(menu);     this.add(panel);        this.revalidate(); } 

a better solution use cardlayout

take @ how use cardlayout more details

ps- should add. should avoid extending directly jframe, instead create application entire on base component, jpanel. when need display it, create instance of jframe , add application component it. way application becomes more flexible in terms of deployment , re-use