button2b.java

来自「Thinking in JAVA第四版源代码」· Java 代码 · 共 31 行

//: gui/Button2b.java
// Using anonymous inner classes.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import static net.mindview.util.SwingConsole.*;

public class Button2b extends JFrame {
  private JButton
    b1 = new JButton("Button 1"),
    b2 = new JButton("Button 2");
  private JTextField txt = new JTextField(10);
  private ActionListener bl = new ActionListener() {
    public void actionPerformed(ActionEvent e) {
      String name = ((JButton)e.getSource()).getText();
      txt.setText(name);
    }
  };
  public Button2b() {
    b1.addActionListener(bl);
    b2.addActionListener(bl);
    setLayout(new FlowLayout());
    add(b1);
    add(b2);
    add(txt);
  }
  public static void main(String[] args) {
    run(new Button2b(), 200, 150);
  }
} ///:~