Key bindings don't work, Java SE, Swing -

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i'm trying add shortcut jbutton. i've read how use key bindings tutorial , have read page how use key bindings instead of key listeners , loooooooooooooot of other questions key bindings, haven't found answer me

what i've tried:

public class example extends jframe {      public static void main(string args[]) {         example example = new example();     }      example(){         action action = new action() {             @override             public object getvalue(string key) {                 return null;             }              @override             public void putvalue(string key, object value) {              }              @override             public void setenabled(boolean b) {              }              @override             public boolean isenabled() {                 return false;             }              @override             public void addpropertychangelistener(propertychangelistener listener) {              }              @override             public void removepropertychangelistener(propertychangelistener listener) {              }              @override             public void actionperformed(actionevent e) {                 system.out.println("hello world!");             }         };          jbutton button = new jbutton("hello world!");         button.getinputmap(jcomponent.when_in_focused_window).put(keystroke.getkeystroke("right"), "dosomething");         button.getactionmap().put("dosomething", action);         button.addactionlistener(action);          add(button);         setvisible(true);         pack();     }  }

i've tried make that: getinputmap(jcomponent.when_in_focused_window).put(keystroke.getkeystroke(keyevent.vk_right, 0, true), "dosmth");

but nothing seems working, doing wrong?

your action has method called isenabled you've implemented. javadoc on states:

/**  * returns enabled state of <code>action</code>. when enabled,  * component associated object active ,  * able fire object's <code>actionperformed</code> method.  *  * @return true if <code>action</code> enabled  */

since return hardcoded false, action never enabled , actionperformed method never called. problem not binding, it's action itself!

a simple fix change isenabled return true, or, simpler yet, use abstractaction in place of action, , override actionperformed (abstractaction kind of "i don't care stuff, give me simplest thing possible 1 method implement!")


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