用JAVA编写 GUI 界面，模拟抢红包游戏，在界面输入红包大小和抢红包人姓名（用逗号隔开），输出系统当前时间以及每个人抢的红包大小，要求每个人抢的红包最少不能少于0.01元

好的，以下是使用 Java 编写的 GUI 界面，模拟抢红包游戏，实现在界面输入红包大小和抢红包人姓名（用逗号隔开），输出系统当前时间以及每个人抢的红包大小，要求每个人抢的红包最少不能少于0.01元：

import java.awt.*;
import java.awt.event.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;
import javax.swing.*;

public class RedPacketGame extends JFrame implements ActionListener {
    private static final long serialVersionUID = 1L;
    private JLabel redPacketLabel, nameLabel, resultLabel;
    private JTextField redPacketField, nameField;
    private JButton submitButton;

    public RedPacketGame() {
        super("抢红包游戏");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new GridLayout(3, 2));
        setSize(400, 150);

        redPacketLabel = new JLabel("红包大小：");
        add(redPacketLabel);

        redPacketField = new JTextField();
        add(redPacketField);

        nameLabel = new JLabel("抢红包人姓名：");
        add(nameLabel);

        nameField = new JTextField();
        add(nameField);

        submitButton = new JButton("抢红包");
        add(submitButton);
        submitButton.addActionListener(this);

        resultLabel = new JLabel();
        add(resultLabel);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        double redPacket = Double.parseDouble(redPacketField.getText().trim());
        String[] names = nameField.getText().trim().split(",");
        int numPeople = names.length;
        double minAmount = 0.01;

        if (redPacket < numPeople * minAmount) {
            resultLabel.setText("红包太少啦，每个人至少能分到0.01元哦！");
            return;
        }

        double[] amounts = new double[numPeople];
        double remainAmount = redPacket;
        Random random = new Random();
        for (int i = 0; i < numPeople - 1; i++) {
            double amount = Math.round(remainAmount / (numPeople - i) * 2 * random.nextDouble() * 100) / 100.0;
            amounts[i] = amount;
            remainAmount -= amount;
        }
        amounts[numPeople - 1] = Math.round(remainAmount * 100) / 100.0;

        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String timeStr = dateFormat.format(new Date());
        StringBuilder resultStr = new StringBuilder("系统当前时间：" + timeStr + "\n");
        for (int i = 0; i < numPeople; i++) {
            String name = names[i];
            double amount = amounts[i];
            resultStr.append(name).append(" 抢到 ").append(amount).append(" 元\n");
        }
        resultLabel.setText(resultStr.toString());
    }

    public static void main(String[] args) {
        RedPacketGame game = new RedPacketGame();
        game.setVisible(true);
    }
}

运行代码后，会出现一个简单的 GUI 界面，里面有两个输入框和一个按钮。在红包大小的输入框中输入红包大小，在抢红包人姓名的输入框中输入抢红包人姓名（多个人姓名之间用逗号隔开），然后点击“抢红包”按钮，程序会自动计算每个人抢到的红包金额，并在界面上显示系统当前时间和每个人抢到的红包金额。如果红包太少，无法保证每个人抢到的金额不少于0.01元，则会在界面上提示红包太少的消息。