参考下面程序实现猜大小的游戏，有两个按钮，分别表示用户猜大还是猜小。代码内部随机产生一个0-9的数，如果产生的数0-4为小，5-9为大。显示用户是否猜对。import java.awt.Color; import java.awt.event.; import javax.swing.; public class ButtonFrame extends JFrame{ private static final long serialVersionUID = 1L; private JPanel buttonPanel; private static final int DFFAULT_WIDTH=300; private static final int DFFAULT_HEIGHT=200; public ButtonFrame() { setSize(DFFAULT_WIDTH,DFFAULT_HEIGHT);

好的，这是一个Java的代码示例，实现了猜大小游戏。

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

public class GuessGame extends JFrame {
    private JPanel buttonPanel;
    private JLabel resultLabel;
    private static final int DEFAULT_WIDTH = 300;
    private static final int DEFAULT_HEIGHT = 200;

    public GuessGame() {
        setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
        setTitle("猜大小游戏");

        buttonPanel = new JPanel();

        JButton bigButton = new JButton("猜大");
        bigButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent event) {
                checkGuess("big");
            }
        });
        buttonPanel.add(bigButton);

        JButton smallButton = new JButton("猜小");
        smallButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent event) {
                checkGuess("small");
            }
        });
        buttonPanel.add(smallButton);

        resultLabel = new JLabel("猜大小游戏", JLabel.CENTER);

        add(buttonPanel, "North");
        add(resultLabel, "Center");
    }

    public void checkGuess(String guess) {
        int randNum = (int) (Math.random() * 10);
        if ((randNum < 5 && guess.equals("small")) || (randNum >= 5 && guess.equals("big"))) {
            resultLabel.setText("恭喜你猜对了！");
            resultLabel.setForeground(Color.GREEN);
        } else {
            resultLabel.setText("很遗憾，猜错了。");
            resultLabel.setForeground(Color.RED);
        }
    }

    public static void main(String[] args) {
        GuessGame game = new GuessGame();
        game.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        game.setVisible(true);
    }
}

这个程序创建了一个JFrame窗口，并添加了两个JButton和一个JLabel，点击猜大或猜小按钮时，程序会根据随机数判断是否猜对，并在JLabel上显示结果。注意，Java中需要使用equals方法比较字符串是否相等。