How can i resolve the Exception in thread "main" java.lang.NoSuchMethodError: main -

i have code. eclipse tells me syntax correct when run program gives me error:

exception in thread "main" java.lang.nosuchmethoderror: main

what's wrong?

import java.awt.color; import java.awt.event.actionevent; import java.awt.event.actionlistener; import javax.swing.jbutton; import javax.swing.jframe; import javax.swing.jpanel;  public class main extends jframe {      private static final long serialversionuid = 1l;     public void main(string[] args){         jframe main = new jframe("test");         main.setsize(600, 600);         main.setlocationrelativeto(null);         main.setvisible(true);         main.setdefaultcloseoperation(jframe.exit_on_close);  //adding jpanel              jpanel panel = new jpanel();         main.add(panel); //jpanel settings         panel.setlayout(null);         panel.setbackground(color.green); //adding jbutton         jbutton button = new jbutton("button 1");         jbutton button2 = new jbutton("button2");         panel.add(button);         panel.add(button2);    //button action         button.addactionlistener(new actionlistener(){     public void actionperformed(actionevent e) {         jpanel panel = new jpanel();         jpanel panel2 = new jpanel();         main.this.getcontentpane().remove(panel);         main.this.getcontentpane().add(panel2);         main.this.getcontentpane().validate();           } });  //jbutton settings         button.setbounds(70, 160, 200, 200);         button2.setbounds(320, 160, 200, 200);       } } 

your main method not static, , should make static. check this see why

public static void main(string [] args)