Surrounded

Surrounded.java

package surrounded;

public class Surrounded {

  public static void main(String[] args) {
    SurroundedFrame frame = new SurroundedFrame("Surrounded");
    SurroundedPanel panel = new SurroundedPanel();
    frame.add(panel);
    frame.run();
  }
}

SurroundedFrame.java

package surrounded;

import javax.swing.JFrame;

@SuppressWarnings("serial")
public class SurroundedFrame extends JFrame {

  public SurroundedFrame(String title) {
   setTitle(title);
   setResizable(false);
   setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }

  public void run() {
    this.pack();
    this.setVisible(true);
  }
}

SurroundedPanel.java

package surrounded;

import javax.swing.JPanel;
import java.awt.Color;

@SuppressWarnings("serial")
public class SurroundedPanel extends JPanel {

  public SurroundedPanel() {
    this.setSize(800, 600);
    this.setBackground(Color.RED);
  }
}