picturebutton.java

learning java的源代码。书中每个实例都有相关的代码example。

//file: PictureButton.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class PictureButton extends JFrame {

  public PictureButton(  ) {
    super("PictureButton v1.0");
    setSize(200, 200);
    setLocation(200, 200);

    Icon icon = new ImageIcon("rhino.gif");
    JButton button = new JButton(icon);
    button.addActionListener(new ActionListener(  ) {
      public void actionPerformed(ActionEvent ae) {
        System.out.println("Urp!");
      }
    });

    Container content = getContentPane(  );
    content.setLayout(new FlowLayout(  ));
    content.add(button);
  }

  public static void main(String[] args) {
    JFrame f = new PictureButton(  );
    f.addWindowListener(new WindowAdapter(  ) {
      public void windowClosing(WindowEvent we) { System.exit(0); }
    });
    f.setVisible(true);
  }
}