AWT着重点理解事件监听器

AWT重点理解事件监听器

import java.awt.*;import java.awt.event.*;class AwtDemo2{private Frame f;private Button but;AwtDemo2(){init();myEvent();f.setVisible(true);}public void init(){f = new Frame("awtdemo2");f.setBounds(300,200,600,500);f.setLayout(new FlowLayout());but = new Button("my button");f.add(but);}private void myEvent(){but.addActionListener(new ActionListener(){private int count = 1;public void actionPerformed(ActionEvent e){//System.out.println(e.getSource());Button b = (Button)e.getSource();//System.out.println(b.getParent());Frame ff = (Frame)b.getParent();ff.add(new Button("new button-"+count++));ff.validate();/*f.add(new Button("new button-"+count++));f.validate();*/}});f.addWindowListener(new WindowAdapter(){public void windowClosing(WindowEvent e){System.exit(0);}});}public static void main(String[] args) {new AwtDemo2();}}

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