swing学习3--添加单选、复选框并获取其中的值

xn136234 2018-09-27 原文

package swing;

import java.awt.Component;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;

public class Test1 {
   private static JPanel pane1,pane2 ;
   public static void main(String[] args) {

       JFrame frame = new JFrame(“复选框”);
       frame.setSize(200,200);
       //设置窗口布局
       frame.setLayout(new GridLayout(3,1));
       frame.setLocation(500,200);
       pane1 = new JPanel();
        pane2 = new JPanel();
       JPanel pane3 = new JPanel();

       //创建复选框组件
       JCheckBox jcb1 = new JCheckBox(“足球”);
       JCheckBox jcb2 = new JCheckBox(“篮球”);
       JCheckBox jcb3 = new JCheckBox(“棑球”);

       //创建单选框组件
       JRadioButton jrb1 = new JRadioButton(“男”);
       JRadioButton jrb2 = new JRadioButton(“nv “);
       //创建单选框按钮组
       ButtonGroup bg = new ButtonGroup();
       JButton jb = new JButton(“按钮”);
       pane3.add(jb);
       pane1.add(jcb1);
       pane1.add(jcb2);
       pane1.add(jcb3);
       //将单选框组件加入单选框按钮组，否则两个都可以选择
       bg.add(jrb1);
       bg.add(jrb2);
       pane2.add(jrb1);
       pane2.add(jrb2);
       frame.add(pane1);
       frame.add(pane2);
       frame.add(pane3);
       frame.setVisible(true);
       //按钮监听事件
       jb.addActionListener(new ActionListener(){

           @Override
           public void actionPerformed(ActionEvent e) {
               // TODO Auto-generated method stub
               String info =””;
               //通过面板属性名获取到该面板上的所有组件
               for(Component c:pane1.getComponents()){
                   //通过 instanceof方法筛选复选框组件
                   if(c instanceof JCheckBox){
                       //判断复选框组件是否被选中
                       if(((JCheckBox) c).isSelected()){
                           //获取该复选框组件信息
                           info += ((JCheckBox)c).getText();
                       }
                   }
               }
               System.out.println(info);
               info=””;
               for(Component c:pane2.getComponents()){
                   if(c instanceof JRadioButton){
                       if(((JRadioButton) c).isSelected()){
                           info += ((JRadioButton)c).getText();
                       }
                   }
               }
               System.out.println(info);
           }

       });
   }
}