swing - Change button text after click, then revert the changes after clicking again using JAVA ActionEvent -

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i displaying code wrote changing text when button clicked. trying default text clicking button again, unable so. please advice.

import javax.swing.*; import java.awt.event.*;  public class actions extends jframe implements actionlistener{      jpanel pnl=new jpanel();     imageicon ic1=new imageicon("/home/mudit/downloads/duke.png");     jbutton btn1=new jbutton("click",ic1);     jtextarea ta=new jtextarea(5,37);      public static void main(string[]args)         {         actions gui=new actions();      }        public actions()      {         super("swing window");         setsize(500,300);         setdefaultcloseoperation(exit_on_close);         add(pnl);         btn1.sethorizontaltextposition(jbutton.center);         btn1.setverticaltextposition(jbutton.bottom);         ta.setlinewrap(true);         ta.setwrapstyleword(true);         pnl.add(btn1);         pnl.add(ta);         btn1.setenabled(true);         ta.settext("button enabled");         btn1.addactionlistener(this);         setvisible(true);     }     public void actionperformed(actionevent event)      {         if(event.getsource()==btn1)         {             ta.settext("button clicked");          }      }      }

you can check text of button if-statement:

if (event.getsource() == btn1) {     if (ta.gettext().equals("button enabled")) {         ta.settext("button clicked");     } else {         ta.settext("button enabled");     } }

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