java中int targetNumber = random.nextInt(100) + 1;的意思

这段代码是在Java中生成一个介于1和100之间（包括1和100）的随机整数。它使用了Random类的nextInt方法，该方法返回一个0到指定值（不包括指定值）之间的随机整数。在这里，nextInt(100)生成一个0到99之间的随机整数，然后通过加1操作将其范围变为1到100。最后，将生成的随机数赋值给targetNumber变量。

相关问题

用java将以下这段代码与图形界面结合起来package chap02; import java.util.*; public class GuessNumber { public static void main(String[] args) { // TODO Auto-generated method stub Scanner sc=new Scanner(System.in); int targetNumber=(int)(Math.random()*10)+1; int guessCount=0;int maxTryTime=5; for(int i=0;i<maxTryTime;i++) { try { System.out.print("请输入一个0~10之间的数字："); int guessNumber= sc.nextInt(); guessCount++; if(guessCount<maxTryTime) {int a=maxTryTime; int c=a-i-1; if(guessNumber>targetNumber) { System.out.println("数人的过大，您还有"+c+"次机会"); continue; } else if(guessNumber<targetNumber) { System.out.println("数人的过小，您还有"+c+"次机会"); continue; } else { System.out.println("恭喜你，猜对了！"); System.out.print("你一共猜了"+guessCount+"次"); break; } } if(guessCount<maxTryTime) { System.out.println("抱歉游戏失败"); } } catch(Exception e) { System.out.println("输入异常，请重新输入!!!"); } } }}

好的，以下是一个简单的Java Swing实现，将上述代码与图形界面结合起来。代码创建了一个包含文本框、标签、按钮和消息框的GUI，以便用户可以输入猜测数字，查看游戏进度和结果。

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

public class GuessNumberGUI extends JFrame implements ActionListener {
    private JLabel promptLabel, resultLabel;
    private JTextField inputField;
    private JButton guessButton;
    private int targetNumber, guessCount, maxTryTime;

    public GuessNumberGUI() {
        targetNumber = (int)(Math.random()*10)+1;
        guessCount = 0;
        maxTryTime = 5;

        promptLabel = new JLabel("请输入一个0~10之间的数字：");
        inputField = new JTextField(10);
        guessButton = new JButton("猜！");
        guessButton.addActionListener(this);
        resultLabel = new JLabel("");

        JPanel panel = new JPanel();
        panel.add(promptLabel);
        panel.add(inputField);
        panel.add(guessButton);
        panel.add(resultLabel);

        this.add(panel);
        this.setTitle("猜数字游戏");
        this.setSize(300, 150);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        String inputText = inputField.getText();
        try {
            int guessNumber = Integer.parseInt(inputText);
            guessCount++;
            if (guessCount < maxTryTime) {
                int c = maxTryTime - guessCount;
                if (guessNumber > targetNumber) {
                    resultLabel.setText("数人的过大，您还有" + c + "次机会");
                } else if (guessNumber < targetNumber) {
                    resultLabel.setText("数人的过小，您还有" + c + "次机会");
                } else {
                    resultLabel.setText("恭喜你，猜对了！你一共猜了" + guessCount + "次");
                    guessButton.setEnabled(false);
                }
            } else {
                resultLabel.setText("抱歉游戏失败");
                guessButton.setEnabled(false);
            }
        } catch (NumberFormatException ex) {
            resultLabel.setText("输入异常，请重新输入!!!");
        }
    }

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

希望这能帮到您！

以下代码只用awt不用swing表示出来package chap03; import javax.swing.*; import java.awt.*; import java.awt.event.*; public class GuessNumber extends JFrame implements ActionListener { private JLabel promptLabel, resultLabel; private JTextField inputField; private JButton guessButton; private int targetNumber, guessCount, maxTryTime; public GuessNumber () { targetNumber = (int)(Math.random()*10)+1; guessCount = 0; maxTryTime = 5; promptLabel = new JLabel("请输入一个0~10之间的数字："); inputField = new JTextField(10); guessButton = new JButton("猜！"); guessButton.addActionListener(this); resultLabel = new JLabel(""); JPanel panel = new JPanel(); panel.add(promptLabel); panel.add(inputField); panel.add(guessButton); panel.add(resultLabel); this.add(panel); this.setTitle("猜数字游戏界面"); this.setSize(300, 150); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setVisible(true); } public void actionPerformed(ActionEvent e) { String inputText = inputField.getText(); try { int guessNumber = Integer.parseInt(inputText); guessCount++; if (guessCount < maxTryTime) { int c = maxTryTime - guessCount; if (guessNumber > targetNumber) { resultLabel.setText("输入的过大，您还有" + c + "次机会"); } else if (guessNumber < targetNumber) { resultLabel.setText("输入的过小，您还有" + c + "次机会"); } else { resultLabel.setText("恭喜你，猜对了！你一共猜了" + guessCount + "次"); guessButton.setEnabled(false); } } else { resultLabel.setText("抱歉游戏失败"); guessButton.setEnabled(false); } } catch (NumberFormatException ex) { resultLabel.setText("输入异常，请重新输入!!!"); } } public static void main(String[] args) { new GuessNumber(); } }

以下是使用 AWT 重写的 GuessNumber 代码：

import java.awt.*;
import java.awt.event.*;
import java.util.Random;

public class GuessNumber extends Frame implements ActionListener {
    private Label promptLabel, resultLabel;
    private TextField inputField;
    private Button guessButton;
    private int targetNumber, guessCount, maxTryTime;

    public GuessNumber() {
        targetNumber = new Random().nextInt(10) + 1;
        guessCount = 0;
        maxTryTime = 5;

        promptLabel = new Label("请输入一个0~10之间的数字：");
        inputField = new TextField(10);
        guessButton = new Button("猜！");
        guessButton.addActionListener(this);
        resultLabel = new Label("");

        Panel panel = new Panel();
        panel.add(promptLabel);
        panel.add(inputField);
        panel.add(guessButton);
        panel.add(resultLabel);

        this.add(panel);
        this.setTitle("猜数字游戏界面");
        this.setSize(300, 150);
        this.addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e){
                System.exit(0);
            }
        });
        this.setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        String inputText = inputField.getText();
        try {
            int guessNumber = Integer.parseInt(inputText);
            guessCount++;
            if (guessCount < maxTryTime) {
                int c = maxTryTime - guessCount;
                if (guessNumber > targetNumber) {
                    resultLabel.setText("输入的过大，您还有" + c + "次机会");
                } else if (guessNumber < targetNumber) {
                    resultLabel.setText("输入的过小，您还有" + c + "次机会");
                } else {
                    resultLabel.setText("恭喜你，猜对了！你一共猜了" + guessCount + "次");
                    guessButton.setEnabled(false);
                }
            } else {
                resultLabel.setText("抱歉游戏失败");
                guessButton.setEnabled(false);
            }
        } catch (NumberFormatException ex) {
            resultLabel.setText("输入异常，请重新输入!!!");
        }
    }

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