java - Undefined Type for JFrame -

so getting error in eclipse java program make new jframe , couldnt quiet figure out wouldnt load correct data set visable , set title, location, size, , should when closes jframe id if please

import javax.swing.*; import java.awt.*;   public class jframe  {      public static void main(string[] args)      {         jframe jf = new jframe();                jf.settitle("test");         jf.setsize(400, 200);         jf.setlocation(200, 300);         jf.setdefaultcloseoperation(javax.swing.jframe.exit_on_close);         jf.setvisible(true);      }  } 

thanks in advance

you named own class jframe, hiding standard javax.swing.jframe class.

choose name class.