24---AWT和Swing(02)JToggleButton

 

1、按下并不弹起：
  import javax.swing.JFrame ;
  import javax.swing.JToggleButton ;
  import java.awt.GridLayout ;

  public class JToggleButtonDemo01{
   public static void main(String args[]){
    JFrame frame = new JFrame("Welcome To MLDN") ;
    JToggleButton but1 = new JToggleButton("已选中",true) ;  // 默认选中
    JToggleButton but2 = new JToggleButton("未选中") ;
    JToggleButton but3 = new JToggleButton("按我") ;
    frame.setLayout(new GridLayout(3,1)) ; // 设置排版样式
    frame.add(but1) ;
    frame.add(but2) ;
    frame.add(but3) ;
    frame.setSize(200,100) ;
    frame.setLocation(300,200) ;
    frame.setVisible(true) ;
   }
  };