java - error: String.format is not accepting event.getActionCommand() [as object] -

i writing basic gui program in java using event handler. code working fine except little error @

string s = string.format("field 1 %s", event.getactioncommand()) 

error

the method format(string, object) of type string not applicable arguments format(string, string)`'.

so event.getactioncommand()) returning string. format method not accepting that.

i doing code in eclipse (kepler) using 1 of famous tutorial on internet. code worked not mine. quite beginner in java. please me in finding silly error.

here code.

package tushar_gui;  import java.awt.flowlayout; import java.awt.event.actionlistener; import java.awt.event.actionevent; import javax.swing.jframe; import javax.swing.joptionpane; import javax.swing.jtextfield; import javax.swing.jpasswordfield;  public class tush extends jframe{  private jtextfield textbox1; private jtextfield textbox2; private jtextfield textbox3 ; private jpasswordfield textbox_pass1;  public tush(){     super("title");     setlayout(new flowlayout());      textbox1 = new jtextfield(10);     add(textbox1);      textbox2 = new jtextfield("enter text here", 30);     add(textbox2);      textbox3 = new jtextfield("this uneditable textbox", 30);     textbox3.seteditable(false);     add(textbox3);      textbox_pass1 = new jpasswordfield("password");     add(textbox_pass1);      thehandler handler = new thehandler();     textbox1.addactionlistener(handler);     textbox2.addactionlistener(handler);     textbox3.addactionlistener(handler);     textbox_pass1.addactionlistener(handler);  }  private class thehandler implements actionlistener{      public void actionperformed(actionevent event){          string string = "";          if(event.getsource() == textbox1)             string = string.format("field 1 %s",     event.getactioncommand());         else if(event.getsource() == textbox2)             string = string.format("field 2 %s",     event.getactioncommand());         else if(event.getsource() == textbox3)             string = string.format("field 3 %s",     event.getactioncommand());         else if(event.getsource() == textbox_pass1)             string = string.format("password field %s",     event.getactioncommand());          joptionpane.showmessagedialog(null, string);     } }  } 

and here main class

package tushar_gui;  import javax.swing.jframe;  public class gui1 {  public static void main (string[] args){      tush tushobject = new tush();     tushobject.setdefaultcloseoperation(jframe.exit_on_close);     tushobject.setsize(500, 500);     tushobject.setvisible(true); } } 

you haven't added action command textboxes

solution:

textbox1 = new jtextfield(10); textbox1.setactioncommand("textbox1 "); add(textbox1);  textbox2 = new jtextfield("enter text here", 30); textbox2.setactioncommand("textbox2 "); add(textbox2);  textbox3 = new jtextfield("this uneditable textbox", 30); textbox3.setactioncommand("textbox3 "); textbox3.seteditable(false);