swing - How to make a thread not freeze you whole JFrame. JAVA -

hey need question answered... how make following code not freeze whole jframe?

                try {                 thread.sleep(integer.parseint(delayfield.gettext()) * 1000);                 system.out.println("hello!");             } catch(interruptedexception ex) {                 thread.currentthread().interrupt();             } 

use different thread perform task. if in main ui thread freeze.. example can following

  new thread() {          @override         public void run() {             try {                 thread.sleep(integer.parseint(delayfield.gettext()) * 1000);                 system.out.println("hello!");             } catch (interruptedexception ex) {                 thread.currentthread().interrupt();             }          }     }.start(); 

update

after wise suggestions of robin , marko updating answer better solution.

    actionlistener taskperformer = new actionlistener() {         public void actionperformed(actionevent evt) {                 system.out.println("hello!");          }     };     javax.swing.timer t = new javax.swing.timer(integer.parseint(delayfield.gettext()) * 1000, taskperformer);     t.setrepeats(false);     t.start();