Question

java如何用checkbox做多选增加

Answer 1

import java.awt.Checkbox;
import java.awt.CheckboxGroup;
import java.awt.Choice;
import java.awt.FlowLayout;
import java.awt.Label;
import java.awt.TextField;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.JFrame;

public class Choose extends JFrame implements ItemListener {
/**
*
*/
private static final long serialVersionUID = 1L;

Label l1, l2;

TextField t1, t2;

CheckboxGroup checkboxGroup = new CheckboxGroup();

Checkbox checkbox1 = new Checkbox("QQ", checkboxGroup, false);

Checkbox checkbox2 = new Checkbox("MSN", checkboxGroup, false);

Checkbox checkbox3 = new Checkbox("ICQ", checkboxGroup, false);

Choice c;

public Choose() {
super("简单小程序");
this.setLayout(new FlowLayout());
l1 = new Label("选择你常用的软件:");
l2 = new Label("选择你喜欢的水果:");
checkbox1.addItemListener(this);
checkbox2.addItemListener(this);
checkbox3.addItemListener(this);
t1 = new TextField(20);
t2 = new TextField(20);
c = new Choice();
c.addItemListener(this);
c.add("苹果");
c.add("橘子");
c.add("香蕉");
c.add("梨子");
this.add(l1);
this.add(checkbox1);
this.add(checkbox2);
this.add(checkbox3);
this.add(t1);
this.add(l2);
this.add(c);
this.add(t2);
this.setSize(450, 200);
this.setVisible(true);

}

public static void main(String[] args) {
new Choose();
}

public void itemStateChanged(ItemEvent e) {
if (e.getSource() == checkbox1) {
t1.setText("你常用的软件是：" + checkbox1.getLabel());
}
if (e.getSource() == checkbox2) {
t1.setText("你常用的软件是：" + checkbox2.getLabel());
}
if (e.getSource() == checkbox3) {
t1.setText("你常用的软件是：" + checkbox3.getLabel());
}

t2.setText("你喜欢的水果是：" + c.getSelectedItem());// 得到选中的下拉列表值

}

}

Answer 2

没明白啥情况！！！楼主啥需求啊？

Answer 3

楼主　在给点信息呀　补充点我帮你看看