java - Having trouble with creating a JFrame and adding text to it -

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i've been trying setup jframe text i'm having trouble. can create jframe, can't background color or text work it.

import java.awt.color;  import javax.swing.jframe; import javax.swing.jlabel; import javax.swing.jpanel;  class fundmanager {      jframe window;     jpanel panel;     jlabel text;      public void createwindow()     {          //create window         window = new jframe();         window.setvisible(true);         window.setsize(960, 540);         window.setdefaultcloseoperation(jframe.exit_on_close);         window.setlocationrelativeto(null);          //create panel         panel = new jpanel();         panel.setbackground(color.red);          //create label         text = new jlabel("test");      }      public static void main(string args[]) {          fundmanager.createwindow();      }  }

my createwindow() method not running , error:

cannot make static reference to non-static method.

however, when make static whole program breaks.

the issue here need instance of fundmanager before can call method createwindow(). try code below instead.

new fundmanager().createwindow();

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