nameapplet.java

来自「Java the UML Way 书中所有源码」· Java 代码 · 共 36 行

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

public class NameApplet extends JApplet {
  private Container guiContainer;
  private JTextField nameField = new JTextField(20);
  private JLabel greeting = new JLabel();

  public void init() {
    guiContainer = getContentPane();
    guiContainer.setLayout(new FlowLayout());

    JLabel nameLabel = new JLabel("What's your name?");
    guiContainer.add(nameLabel);
    guiContainer.add(nameField);

    JButton myButton = new JButton("Push here!");
    guiContainer.add(myButton);
    ButtonListener theButtonListener = new ButtonListener();
    myButton.addActionListener(theButtonListener);

    guiContainer.add(greeting);
  }

  private class ButtonListener implements ActionListener {
    public void actionPerformed(ActionEvent event) {
      String name = nameField.getText();
      greeting.setText("Hallo, " + name + "!");
    }
  }
}