colorbuttonapplet.java

来自「Java the UML Way 书中所有源码」· Java 代码 · 共 29 行

/*
 * ColorButtonApplet.java  E.L. 2001-08-18
 *
 */
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class ColorButtonApplet extends JApplet {
  public void init() {
    Container guiContainer = getContentPane();
    guiContainer.setLayout(new FlowLayout());
    JButton myButton = new JButton("Push here!!");
    guiContainer.add(myButton);
    ButtonListener theButtonListener = new ButtonListener(guiContainer);
    myButton.addActionListener(theButtonListener);
  }
}

class ButtonListener implements ActionListener {
  private Container theGuiContainer;
  public ButtonListener(Container initContainer) {
    theGuiContainer = initContainer;
  }

  public void actionPerformed(ActionEvent event) {
    theGuiContainer.setBackground(Color.red);
  }
}