java - Trying to use cards layout, but cant make show work -


im trying to use cards layout, , have 2 buttons @ the top supoose change card reason wont work, next method works show or first\last doesnt, ofcourse cant use next, cause want specific card every button, here code:

     cards = new cardlayout();     cardpanel = new jpanel();     cardpanel.setlayout(cards);     cards.show(cardpanel, "gapas");      jpanel firstcard = new jpanel();     firstcard.setbackground(color.white);;       jpanel secondcard = new jpanel();     secondcard.setbackground(color.blue);       cardpanel.add(firstcard, "kalam");     cardpanel.add(secondcard, "gapan");      guiframe.add(tabspanel,borderlayout.north);     guiframe.add(cardpanel,borderlayout.center);     guiframe.setvisible(true); }  actionlistener action = new actionlistener() {      @override     public void actionperformed(actionevent e) {         if(e.getactioncommand().matches("kalam")){             cards.show(cardpanel,"kalam");             system.out.println("kalam");         }         else{             cards.show(cardpanel, "gapas");             system.out.println("gapas");         }      } };

i think want this.

public class testcard extends jframe implements actionlistener {  cardlayout cards; jpanel cardpanel, tabspanel; jbutton b1, b2;  public testcard() {     b1= new jbutton("kalam");     b2= new jbutton("gapas");     tabspanel = new jpanel();     cards = new cardlayout();     cardpanel = new jpanel();     cardpanel.setlayout(cards);      jpanel firstcard = new jpanel();     firstcard.setbackground(color.white);       jpanel secondcard = new jpanel();     secondcard.setbackground(color.blue);       cardpanel.add(firstcard, "kalam");     cardpanel.add(secondcard, "gapas");     tabspanel.add(b1);     tabspanel.add(b2);      add(tabspanel, borderlayout.north);     add(cardpanel, borderlayout.center);     b1.addactionlistener(this);     b2.addactionlistener(this);     setsize(800, 600);      cards.show(cardpanel, "gapas");     setvisible(true); }  @override public void actionperformed(actionevent e) {     if (e.getactioncommand().matches("kalam")) {         cards.show(cardpanel, "kalam");         system.out.println("kalam");     } else {         cards.show(cardpanel, "gapas");         system.out.println("gapas");     } } public static void main(string[] args) {     new testcard(); } }

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