swing - how to close a JFrame class with a button in another JFrame class in java? -

i have 2 jframes (framea , frameb). frameb can opened framea , when open frameb, framea must left open. frameb has got button (close_framea). when button clicked close framea.

how can it?

you can use below 2 class: tjframe , openframe close jframe class button in jframe

 public class tjframe { public static openframe openwindow;  public static void main(string[] args) {     jframe frame = new jframe("swing frame");     jbutton button = new jbutton("open");     frame.add(button);     button.addactionlistener(new actionlistener() {         @override         public void actionperformed(actionevent e) {             openwindow = new openframe();             openwindow.setvisible(true);         }     });     frame.setdefaultcloseoperation(windowconstants.dispose_on_close);     frame.setsize(350, 200);     frame.setvisible(true);     }}   public class openframe extends jframe{  jpanel back_panel; public jbutton button = new jbutton("cross");  public openframe() {     back_panel = new jpanel();     setcontentpane(back_panel);     this.setsize(350, 200);      button.setbounds(380, 10, 20, 20);     button.addactionlistener(new actionlistener() {          @override         public void actionperformed(actionevent arg0) {             dispose();          }     });      back_panel.add(button); }}