java - how to display only button with out jframe or jpanel visible? -


example below display button jframe window. want button visible, how can implement?

public final void initui() {    jpanel panel = new jpanel();   getcontentpane().add(panel);    panel.setlayout(null);    jbutton quitbutton = new jbutton("quit");    quitbutton.setbounds(50, 60, 80, 30);    quitbutton.addactionlistener(new actionlistener() {        public void actionperformed(actionevent event) {            system.exit(0);       }    });     panel.add(quitbutton);     settitle("quit button");    setsize(300, 200);    setlocationrelativeto(null);    setdefaultcloseoperation(exit_on_close); }

depending on mean "with out jframe or jpanel visible?" create transparent window...

boo

import java.awt.color; import java.awt.eventqueue; import java.awt.event.actionevent; import java.awt.event.actionlistener; import javax.swing.jbutton; import javax.swing.jframe; import javax.swing.uimanager; import javax.swing.unsupportedlookandfeelexception;  public class ghostbutton {      public static void main(string[] args) {         new ghostbutton();     }      public ghostbutton() {         eventqueue.invokelater(new runnable() {             @override             public void run() {                 try {                     uimanager.setlookandfeel(uimanager.getsystemlookandfeelclassname());                 } catch (classnotfoundexception | instantiationexception | illegalaccessexception | unsupportedlookandfeelexception ex) {                 }                  jbutton ghostbutton = new jbutton("boo!");                 ghostbutton.addactionlistener(new actionlistener() {                     @override                     public void actionperformed(actionevent e) {                         system.exit(0);                     }                 });                  jframe frame = new jframe("testing");                 frame.setundecorated(true);                 frame.setbackground(new color(0,0,0,0));                 frame.setdefaultcloseoperation(jframe.exit_on_close);                 frame.add(ghostbutton);                 frame.pack();                 frame.setlocationrelativeto(null);                 frame.setvisible(true);             }         });     }  }

if remove frame.setbackground(new color(0,0,0,0));, frameless window

ps- works under java 7+, there trick make work under java 6, i've not posted here


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