swing如何在核心java程序中添加单选按钮组，以便一次只选择一个单选按钮？

Question

我正在用核心java构建一个项目。但我一直在制作单选按钮组（用于输入性别（男/女））。为此，我需要一个单选组，这样一次只能选择一个单选按钮；并将输入相应地输入数据库。请帮忙

Answer 1

    JPanel radioButtonPanel = new JPanel();
    append = new JRadioButton("append");
    build = new JRadioButton("x.x.1");
    build.setSelected(true); //sets this button as selected on startup
    small = new JRadioButton("x.1.x");
    huge = new JRadioButton("1.x.x");

    // Create the button group to keep only one selected.
    ButtonGroup btnGroup = new ButtonGroup();
    btnGroup.add(append);
    btnGroup.add(build);
    btnGroup.add(small);
    btnGroup.add(huge);

然后将按钮添加到JPanel或类似的东西中

Answer 2

请尝试使用ButtonGroup组件，并向ButtonGroup对象添加两个名为男性和女性的JRadioButton组件，然后使用setVisible（true）将其显示在JFrame中；方法

以下代码应该很有用：-

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JRadioButton;

public class Rb extends JFrame {
    Rb() {
        JRadioButton male = new JRadioButton("male");
        JRadioButton female = new JRadioButton("Female");
        ButtonGroup bG = new ButtonGroup();
        bG.add(male);
        bG.add(female);
        this.setSize(100, 200);
        this.setLayout(new FlowLayout());
        this.add(male);
        this.add(female);
        male.setSelected(true);
        this.setVisible(true);
    }

    public static void main(String args[]) {
        Rb j = new Rb();
    }
}