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Asked: 2026-06-15T17:37:16+00:00

I have 2 classes, My main class creates a frame and I want another

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I have 2 classes,

My main class creates a frame and I want another class to add content to it. A bit of reading arroudn told me I should use components to do this however when I run my code the frame is empty. 

 public static void main(String[] args)
 {
    // create frame
    JFrame frame = new JFrame();
    final int FRAME_WIDTH = 800;
    final int FRAME_HEIGHT = 600;
    // set frame attributes
    frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
    frame.setTitle("My Frame");
    frame.setVisible(true);

    Component1 Com = new Component1();
    Component add = frame.add(Com);

}

My Component class creates a JLabel

public class Component1 extends JComponent {

   public void paintComponent()
   {
       JLabel label = new JLabel("<html>Some Text</html>");
   }
}

I don’t get any compile errors, however I dont get any text in my JFrame.

Can anyone explain what I’m doing wrong?

Chris

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1 Answer

  1. Editorial Team

    You need to add the JLabel. Also better to extend JPanel instead of JComponent as it has a default layout manager and will make any added components appear without the need to set component sizes. paintComponent is used for custom painting BTW.

    public class Component1 extends JPanel {

   Component1() {
      JLabel label = new JLabel("<html>Some Text</html>");
      add(label);
   }
}
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