Building graphical user interfaces - Objects First with Java: A Practical Introduction Using BlueJ - page 370

Figure 11.2
A simple
image-viewer
application

Java calls these top-level windows frames. In Swing, they are represented by a class called
JFrame .

Code 11.1
A first version of an
ImageViewer class

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

// Comment omitted.

public class ImageViewer
{

private JFrame frame;

/**
* Create an ImageViewer and show it on screen.
*/
public ImageViewer()
{

makeFrame();

}

/**
* Create the Swing frame and its content.
*/
private void makeFrame()