JTextField 限制指定字符不能输入

 1         txtStartDate.addKeyListener(new KeyAdapter()
 2         {
 3             public void keyTyped(KeyEvent e)
 4             {
 5                 int keyChar = e.getKeyChar();
 6                 if(KeyEvent.VK_SPACE == keyChar)
 7                 {
 8                     e.consume();
 9                 }
10             }
11         });