eclipse 实现复选框和单选按钮java代码

在Eclipse中创建复选框和单选按钮的基本Java代码通常涉及Swing库，这是一个用于构建图形用户界面(GUI)的标准组件。下面是一个简单的示例：

**复选框(CheckBox):**

import javax.swing.*;
import java.awt.event.*;

public class CheckboxExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Checkbox Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // 创建一个JPanel来放置复选框
        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(1, 0, 5, 5)); // 设置布局

        // 添加复选框
        JCheckBox checkBox1 = new JCheckBox("Option 1", true); // 第一个默认选中
        JCheckBox checkBox2 = new JCheckBox("Option 2");
        panel.add(checkBox1);
        panel.add(checkBox2);

        // 监听复选框状态变化
        checkBox1.addActionListener(e -> System.out.println("Checkbox 1 changed to " + checkBox1.isSelected()));
        checkBox2.addActionListener(e -> System.out.println("Checkbox 2 changed to " + checkBox2.isSelected()));

        frame.add(panel);
        frame.pack();
        frame.setVisible(true);
    }
}

**单选按钮(RadioButton):**

import javax.swing.*;
import java.awt.event.*;

public class RadioButtonExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("RadioButton Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // 创建一个JPanel来放置单选按钮
        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(1, 0, 5, 5));

        // 添加单选按钮
        JRadioButton radioButton1 = new JRadioButton("Option 1");
        JRadioButton radioButton2 = new JRadioButton("Option 2");
        radioButton1.setSelected(true); // 设置第一个为默认选项

        // 将它们添加到RadioGroup
        ButtonGroup group = new ButtonGroup();
        group.add(radioButton1);
        group.add(radioButton2);

        // 监听单选按钮选择
        radioButton1.addActionListener(e -> System.out.println("Selected option is: " + radioButton1.getText()));
        radioButton2.addActionListener(e -> System.out.println("Selected option is: " + radioButton2.getText()));

        panel.add(radioButton1);
        panel.add(radioButton2);

        frame.add(panel);
        frame.pack();
        frame.setVisible(true);
    }
}

这两个例子都展示了如何在Eclipse环境中使用Swing创建并监听复选框和单选按钮的事件。你可以根据实际需求调整这些代码。