java - How do I construct a JFrame child class? -

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i'm trying make child class jframe. think im doing correctly when run opens blank window without name or background color (my jpanel class background. however, know error not there because commented out add(jpanel) , window still didn't have name) eclipse doesn't show syntax errors. why doesn't code work?:

main class:

package ashwin.engine; import javax.swing.*; import java.awt.*;  public class execute {      public static void main(string[] args) {         swingutilities.invokelater(new runnable(){              @override             public void run() {                 int[] bcolor = new int[3];                 bcolor[0] = 254;                 bcolor[1] = 0;                 bcolor[2] = 0;                 window  wndw = new window("test", 1000, 1000, bcolor, true);              } });      }  }

jframe child class:

package ashwin.engine; import javax.swing.*; import java.awt.*;  public class window extends jframe {     window(string name, int width, int length, int[] backgroundcolor, boolean visible) {          system.out.println("made frame class");          setname(name);         setvisible(visible);         setsize(width, length);         setdefaultcloseoperation(jframe.exit_on_close);          display display = new display(backgroundcolor);       } }

edit: forgot mention, print out debug statement "made frame class", dont know if helps thought should point out.

you shouldn't use setname settitle. display name on screen. background, should use getcontentpane().setbackgroundcolor(color color)

the chode should this:

public class execute {      public static void main(final string[] args) {         swingutilities.invokelater(new runnable() {              @override             public void run() {                 final color bcolor = new color(254, 0, 0);                  final window wndw = new window("test", 1000, 1000, bcolor, true);              }         });      }  }  public class window extends jframe {     window(final string name, final int width, final int length, final color backgroundcolor,             final boolean visible) {          system.out.println("made frame class");         this.settitle(name);         this.setsize(width, length);         this.getcontentpane().setbackground(backgroundcolor);         this.setdefaultcloseoperation(jframe.exit_on_close);         this.setvisible(visible);      } }

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