第11章 GUI 06 事件模型 ActionEvent

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// TFPassWord.javaimport java.awt.*;import java.awt.event.*;public class TFPassWord {public static void main(String args[]){new TFFrame2();}}class TFFrame2 extends Frame {TFFrame2() {TextField tf = new TextField();add(tf);tf.addActionListener(new TFActionListener2());tf.setEchoChar('*');pack();setVisible(true);}}class TFActionListener2 implements ActionListener {public void actionPerformed(ActionEvent e) {TextField tf = (TextField)e.getSource();System.out.println(tf.getText());//tf.setText(" ");}}

// TFActionEvent.javaimport java.awt.*;import java.awt.event.*;public class TFActionEvent {public static void main(String args[]){new TFFrame();}}class TFFrame extends Frame {TFFrame() {TextField tf = new TextField();add(tf);tf.addActionListener(new TFActionListener());pack();setVisible(true);}}class TFActionListener implements ActionListener {public void actionPerformed(ActionEvent e) {TextField tf = (TextField)e.getSource();System.out.println(tf.getText());//tf.setText(" ");}}

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