Swing Display Frame

While both programs and applications can become important, it becomes confusing and useless to use them everywhere. The remainder of this section replaces them with the display framework for a swing program example:

: Show.java
//Tool for displaying Swing demos
package c13.swing;
Import java.awt.*;
Import java.awt.event.*;
Import javax.swing.*;

public class Show {public
  static void 
  inframe (JPanel jp, int width, int height) {
    String title = Jp.getclass (). toString ();
    Remove the word "class":
    if (Title.indexof ("class")!=-1)
      title = title.substring (6);
    JFrame frame = new JFrame (title);
    Frame.addwindowlistener (New Windowadapter () {public
      void windowclosing (WindowEvent e) {
        system.exit (0);
      }
    });
    Frame.getcontentpane (). Add (
      JP, borderlayout.center);
    Frame.setsize (width, height);
    Frame.setvisible (True);
  }
///:~

Classes that want to show their own will inherit from the JPanel and then add some visual components to themselves. Finally, they create a main () that contains the following line of programs:
Show.inframe (New MyClass (), 500, 300);
The last two arguments are the width and height of the display.
Note that the title of the JFrame is produced with Rtti.