JTextField屏蔽数字时consumer()无效而TextField有效

Question

本帖最后由 wu862431048 于 2013-06-16 22:00:35 编辑

Answer 1

#3说的对。
public class test5 extends JFrame { public test5() {
JTextField field = new JTextField(10);
field.addKeyListener(new KeyAdapter() {
//添加事件监听
public void keyTyped(KeyEvent e)
{
// System.out.println(e.getKeyCode());
if(!(e.getKeyChar()>=KeyEvent.VK_0 && e.getKeyChar()<=KeyEvent.VK_9))
{

e.consume();//?????怎么没用效啊
}
}
});
this.add(field);
this.setLayout(new FlowLayout());
this.setBounds(100, 200, 300, 100);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
} public static void main(String[] args)
{
new test5();
}}
awt的;
public class test5 extends Frame {
public test5() {
TextField field = new TextField(10);
field.addKeyListener(new KeyAdapter() {
//添加事件监听
public void keyTyped(KeyEvent e)
{
System.out.println(e.getKeyCode());
if(!(e.getKeyChar()>=KeyEvent.VK_0 && e.getKeyChar()<=KeyEvent.VK_9))
{
e.consume();
}
}
});
this.add(field);
this.setLayout(new FlowLayout());
this.setBounds(100, 200, 300, 100);
this.add(new Label("AWT 不能输入字符"));
this.setVisible(true);
this.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
} public static void main(String[] args)
{
new test5();
}}

Answer 2

@Override public void keyTyped(KeyEvent e)
            {
                System.out.println(e.getKeyCode());
                if(Character.isDigit(e.getKeyChar()))
                {
                    e.consume();
                }
            }

Answer 3

谁能详细解释一下 keyTeped 是个啥意思？帮助文档看不到

Answer 4

keyPressed 按下
keyReleased 释放
keyTyped 按下+释放