package 常用组件之JCheckBox



import java.awt.event.ItemEvent

import java.awt.event.ItemListener

import java.awt.event.WindowAdapter

import java.awt.event.WindowEvent



import javax.swing.ButtonGroup

import javax.swing.JCheckBox

import javax.swing.JFrame

import javax.swing.JLabel

import javax.swing.JPanel -JCheckBox package of commonly used components　import java.awt.event.ItemEvent　import java.awt.event.ItemListener　import java.awt.event.WindowAdapter　import java.awt.event.WindowEvent　import javax.swing.ButtonGroup　import javax.swing.JCheckBox　import javax.swing.JFrame　import javax.swing.JLabel　import javax.swing.JPanel