faces.java

《Thinking in Java 4th Edition》 Source Code

//: gui/Faces.java
// Icon behavior in JButtons.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import static net.mindview.util.SwingConsole.*;

public class Faces extends JFrame {
  private static Icon[] faces;
  private JButton jb, jb2 = new JButton("Disable");
  private boolean mad = false;
  public Faces() {
    faces = new Icon[]{
      new ImageIcon(getClass().getResource("Face0.gif")),
      new ImageIcon(getClass().getResource("Face1.gif")),
      new ImageIcon(getClass().getResource("Face2.gif")),
      new ImageIcon(getClass().getResource("Face3.gif")),
      new ImageIcon(getClass().getResource("Face4.gif")),
    };
    jb = new JButton("JButton", faces[3]);
    setLayout(new FlowLayout());
    jb.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        if(mad) {
          jb.setIcon(faces[3]);
          mad = false;
        } else {
          jb.setIcon(faces[0]);
          mad = true;
        }
        jb.setVerticalAlignment(JButton.TOP);
        jb.setHorizontalAlignment(JButton.LEFT);
      }
    });
    jb.setRolloverEnabled(true);
    jb.setRolloverIcon(faces[1]);
    jb.setPressedIcon(faces[2]);
    jb.setDisabledIcon(faces[4]);
    jb.setToolTipText("Yow!");
    add(jb);
    jb2.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        if(jb.isEnabled()) {
          jb.setEnabled(false);
          jb2.setText("Enable");
        } else {
          jb.setEnabled(true);
          jb2.setText("Disable");
        }
      }
    });
    add(jb2);
  }
  public static void main(String[] args) {
    run(new Faces(), 250, 125);
  }
} ///:~