Java技能树-GUI-AWT-组件-CheckboxGroup类

1 需求

2 接口

Class CheckboxGroup

public class CheckboxGroup extends Object implements Serializable

java.lang.Object 
        java.awt.CheckboxGroup 

• Constructor Detail
  • public CheckboxGroup()
• Method Detail
  • public Checkbox getSelectedCheckbox()
  • public void setSelectedCheckbox(Checkbox box)
  • public String toString()

3 示例代码

import java.awt.*;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

public class Test {
    public static void main(String[] args) {
        Frame frame = new Frame("TextArea Demo");

        Panel panel = new Panel();
        CheckboxGroup cg = new CheckboxGroup();
        Checkbox cb1 = new Checkbox("1", cg, true);
        Checkbox cb2 = new Checkbox("2", cg, false);

        MyItemListener myItemListener = new MyItemListener();

        cb1.addItemListener(myItemListener);
        cb2.addItemListener(myItemListener);

        panel.add(cb1);
        panel.add(cb2);

        frame.add(panel);

        frame.setBounds(100, 100, 300, 300);

        frame.setVisible(true);
    }


    static class MyItemListener implements ItemListener {

        @Override
        public void itemStateChanged(ItemEvent e) {
            Checkbox cb = (Checkbox) e.getItemSelectable();
            switch (cb.getLabel()) {
                case "1":
                    System.out.println("当前组件名字：" + cb.getLabel());
                    System.out.println("当前组件状态： " + cb.getState());
                    break;
                case "2":
                    System.out.println("当前组件名字：" + cb.getLabel());
                    System.out.println("当前组件状态： " + cb.getState());
                    break;
                default:
                    break;
            }
        }
    }
}

4 参考资料