Question

JAVA中JRadioButton控件怎么样获取选择值

Answer 1

//声名两个单选按钮
private JRadioButton male;
private JRadioButton female;
//初始化按钮，男为默认选中
male = new JRadioButton("男", true);
female = new JRadioButton("女");
//将两个按钮放到同一个组中
ButtonGroup group = new ButtonGroup();
group.add(male);
group.add(female);
//在actionPerformed(...)中获得按钮的选择值
DefaultButtonModel model = (DefaultButtonModel) male.getModel();
if (model.getGroup().isSelected(model))
//男被选中的处理

else
//女被选中的处理

Answer 2

给你个例子，你看看吧，有什么问题再问我：
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class E extends JFrame implements ItemListener{
JPanel jp=new JPanel();
JTextArea ja=new JTextArea("文本框",12,12);
JScrollPane jsp=new JScrollPane(ja);
JRadioButton radiobutton;// 单选框
E(){
super("JRadioButton Test");
radiobutton = new JRadioButton("单选框");
Container con= this.getContentPane();
con.setLayout(new GridLayout(3,1));
// 添加单选框
con.add(radiobutton);
radiobutton.setLocation(160, 110);
radiobutton.setSize(100,120);
radiobutton.addItemListener((ItemListener) this);
//将JtextArea加到容器中
jp.add(jsp);
con.add(jp);

setSize(300, 200);;
this.setLocation(300, 300);
setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void itemStateChanged(ItemEvent e) {
if(e.getSource()==radiobutton){
JRadioButton jrb=(JRadioButton)e.getSource();
if(jrb.isSelected()){
ja.setText(jrb.getText());
}else{
ja.setText("");
}
}
}
public static void main(String[] args) {
new E();
}
}

Answer 3

可以试一下getText()成员，父类的一个函数！