Create a Simple Window Using JFrame

Code Checkpoint

Microsoft product screen shot(s) reprinted with permission from Microsoft Corporation.

As we have been doing a lot of typing, this is a good point to make sure your code matches the example. Here is what your code should look like :

import java.awt.*;
import javax.swing.*;

// Create a simple GUI window
public class TopLevelWindow {

   private static void createWindow() {

      //Create and set up the window.
      JFrame frame = new JFrame("Simple GUI");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON _CLOSE);

      JLabel textLabel = new JLabel("I'm a label in the window",SwingConstants.CENTER);
      textLabel.setPreferredSize(new Dimension(300, 100));
      frame.getContentPane().add(textLabel, BorderLayout.CENTER);

      //Display the window.
      frame.setLocationRelativeTo(null);
      frame.pack();
      frame.setVisible(true);
   }

   public static void main(String[] args) {

      createWindow();

   }
}

• Reference the Graphical Components
• Create the Application Class
• The Function to Create the JFrame
• Add a JLabel to the JFrame
• The Application Entry Point
• Code Checkpoint
• Save, Compile and Run