获取从java中的单选按钮中选择的值

import javax.swing.*;

import java.awt.*;

public class RadioButtonTest extends JFrame {

private JTextField jtfAnswer = new JTextField(10);
private JRadioButton jrbMale = new JRadioButton("Male");
private JRadioButton jrbFemale = new JRadioButton("Female");
private JButton jbSubmit = new JButton("Submit");

public RadioButtonTest(){
    setLayout(new GridLayout(5,1));

    ButtonGroup group = new ButtonGroup();
    group.add(jrbMale);
    group.add(jrbFemale);

    add(new Label("Select gender:"));
    add(jrbMale);
    add(jrbFemale);
    add(jtfAnswer);
    add(jbSubmit);

    setTitle("Radio Button");
    setLocationRelativeTo(null);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setLocation(200, 200);
    setSize(150, 150);
    setVisible(true);
}

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

我知道应该添加一个actionlistener来获取所选的值,但是我应该在actionlistener中编写什么内容？

解决方法:

I know should add an actionlistener to obtain the selected values ,
but what is the content I should code in the actionlistener?

在ActionListener中,您可以询问谁是动作事件的来源,然后根据需要设置文本字段的文本：

ActionListener actionListener = new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent e) {
        if(e.getSource() instanceof JRadioButton){
            JRadioButton radioButton = (JRadioButton) e.getSource();
            if(radioButton.isSelected()){
                jtfAnswer.setText(radioButton.getText());
            }
        }
    }
};

jrbMale.addActionListener(actionListener);
jrbFemale.addActionListener(actionListener);

注意建议阅读EventObject.getSource()

标签：jradiobutton,java,swing
来源： https://codeday.me/bug/20190728/1565236.html