java语言简单程序代码 java简单编程代码

用JAVA语言编写一个程序，要求如下：

import java.util.Random;

import java.util.Scanner;

public class T {

public static void main(String[] args) throws Exception {

Scanner in = new Scanner(System.in);

int difficulty;//难度

int mode;//运算类型

int answer;//答案

int amount;//挑战题目数量

int score = 0;//得分

System.out.println("请输入难度（1：一位数、2：两位数、3：三位数）：");

difficulty = in.nextInt();

System.out.println("请输入运算类型（1：加、2：减、3：乘、4：除）：");

mode = in.nextInt();

System.out.println("请输入想要挑战的题目数量：");

amount = in.nextInt();

Random random = new Random();

for (int i = 0; i amount; i++) {

if (difficulty == 1) {

if (mode == 1) {

int x = random.nextInt(10);

int y = random.nextInt(10);

System.out.println("第" + i + "题：");

System.out.print(x + " + " + y + " = ");

answer = in.nextInt();

if (answer == (x + y)) {

System.out.println("答对了\n");

score++;

} else {

System.out.println("答错了，答案是：" + (x + y) + "\n");

}

} else if (mode == 2) {

int x = random.nextInt(10);

int y = random.nextInt(10);

System.out.println("第" + i + "题：");

System.out.print(x + " - " + y + " = ");

answer = in.nextInt();

if (answer == (x - y)) {

System.out.println("答对了\n");

score++;

} else {

System.out.println("答错了，答案是：" + (x - y) + "\n");

}

} else if (mode == 3) {//乘法

} else if (mode == 4) {//除法 考虑小数的问题

} else {

throw new Exception("运算类型输入值不合法");

}

} else if (difficulty == 2) {

if (mode == 1) {

int x = random.nextInt(100);

int y = random.nextInt(100);

System.out.println("第" + i + "题：");

System.out.print(x + " + " + y + " = ");

answer = in.nextInt();

if (answer == (x + y)) {

System.out.println("答对了\n");

score++;

} else {

System.out.println("答错了，答案是：" + (x + y) + "\n");

}

} else if (mode == 2) {

} else if (mode == 3) {//乘法

} else if (mode == 4) {//除法 考虑小数的问题

} else {

throw new Exception("运算类型输入值不合法");

}

} else if (difficulty == 3) {

if (mode == 1) {

int x = random.nextInt(1000);

int y = random.nextInt(1000);

System.out.println("第" + i + "题：");

System.out.print(x + " + " + y + " = ");

answer = in.nextInt();

if (answer == (x + y)) {

System.out.println("答对了\n");

score++;

} else {

System.out.println("答错了，答案是：" + (x + y) + "\n");

}

} else if (mode == 2) {

} else if (mode == 3) {//乘法

} else if (mode == 4) {//除法 考虑小数的问题

} else {

throw new Exception("运算类型输入值不合法");

}

} else {

throw new Exception("难度输入值不合法");

}

}

System.out.println("挑战结束，您的分数为：" + score);

}

}

我就只举了加法的例子，其他运算的写法都是类似的，你照葫芦画瓢即可

运行结果：

相关问答

Q1: 用JAVA编写一个程序，要求如下：

实现代码如下：

Student类：

public class Student {

private String name;

private String sex;

private int age;

private double chinese;

private double math;

private double english;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getSex() {

return sex;

}

public void setSex(String sex) {

this.sex = sex;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

public double getChinese() {

return chinese;

}

public void setChinese(double chinese) {

this.chinese = chinese;

}

public double getMath() {

return math;

}

public void setMath(double math) {

this.math = math;

}

public double getEnglish() {

return english;

}

public void setEnglish(double english) {

this.english = english;

}

}

-----------------------------------------------------------------

StudentTest类：（测试类）

import java.util.Scanner;

public class StudentTest {

public static void main(String[] args) {

Student student = new Student();

Scanner sc = new Scanner(System.in);

System.out.println("请输入姓名：");

student.setName(sc.next());

System.out.println("请输入性别：");

student.setSex(sc.next());

System.out.println("请输入年龄：");

student.setAge(sc.nextInt());

System.out.println("请输入语文成绩、数学成绩、英语成绩：");

student.setChinese(sc.nextDouble());

student.setMath(sc.nextDouble());

student.setEnglish(sc.nextDouble());

Double count = student.getChinese()+ student.getMath()+student.getEnglish();

System.out.println("姓名："+student.getName()+" 性别："+student.getSex()+" 年龄："+student.getAge());

System.out.println("总分："+count+" 平均分："+count/3);

}

}

运行结果为：

Q2: 求编写一个超级简单的Java的程序源代码

import java.awt.FlowLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPasswordField;

import javax.swing.JTextField;

public class Login {

public static void main(String args[]) {

LoginFrm frame = new LoginFrm();

}

}

class LoginFrm extends JFrame implements ActionListener{

JLabel nameLabel=new JLabel("用户名：");

JLabel pwdLabel=new JLabel("密码：");

JTextField name=new JTextField(10);

JPasswordField password=new JPasswordField(10);

JButton butnSure=new JButton("确定");

JButton butnCancel=new JButton("取消");

public LoginFrm() {

super("登陆");

setBounds(500, 200, 280, 220);

setVisible(true);

setLayout(null);

nameLabel.setBounds(45, 20, 100, 25);

add(nameLabel);

add(name);

name.setBounds(105, 20, 110, 25);

add(pwdLabel);

pwdLabel.setBounds(45, 60, 100, 25);

add(password);

password.setBounds(105, 60, 110, 25);

add(butnSure);

butnSure.setBounds(45, 100, 80, 25);

add(butnCancel);

butnCancel.setBounds(135, 100, 80, 25);

butnSure.addActionListener(this);

butnCancel.addActionListener(this);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

validate();//刷新

}

public void actionPerformed(ActionEvent e) {

if (e.getSource() ==butnSure){

System.out.println("用户名："+name.getText());

System.out.println("密码："+name.getText());

if("admin".equals(name.getText().trim())"123".equals(password.getText().trim())){

this.dispose();

new MainFrm("用户界面",name.getText().trim(),password.getText().trim());

}else {

JOptionPane.showMessageDialog(this, "用户不存在");

}

}else if(e.getSource()==butnCancel){

System.exit(1);

}

}

class MainFrm extends JFrame{

private JLabel info;

public MainFrm(String s,String name,String password) {

super(s);

setBounds(400, 200, 500, 400);

setLayout(new FlowLayout());

info=new JLabel("登陆成功，用户名："+name+"，密码："+password);

add(info);

setVisible(true);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

validate();

}

}

}

Q3: 求一个简单java程序代码，谢谢

public class TestStar {

public static void main(String[] args) {

String star = "*";

for (int i = 0; i 5; i++) {

if (i == 0) {

System.out.print(" " + star);

System.out.println();

}

if (i == 1) {

for (int z = 0; z 4; z++) {

System.out.print(" " + star);

}

System.out.println();

}

if (i == 2) {

System.out.print(" ");

for (int x = 0; x 3; x++) {

System.out.print(" " + star);

}

System.out.println();

}

if (i == 3) {

for (int y = 0; y 2; y++) {

System.out.print(" " + star + " ");

}

}

}

}

}

是好使的 但是我没找到画五角星有什么规律（五角星好象不是正规图形吧？）如果还有什么要求的话 补充问题(如果是用*填充所有的东西 不包括 “ ”的话 我可以重新再给你写一个)

Q4: Java语言简单程序设计

参考代码

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

//jdk1.8 通过测试

public class DemoFrame extends JFrame implements ActionListener{

JTextField jtf1,jtf2,jtf3;

public DemoFrame() {

jtf1 = new JTextField(5);//文本框

JLabel jl = new JLabel("+");

jtf2 = new JTextField(5);

JButton jb1 = new JButton("=");

jb1.addActionListener(this);

jtf3 = new JTextField(5);

jtf3.setEditable(false);//文本框不许编辑

add(jtf1);add(jl);add(jtf2);add(jb1);add(jtf3);

setLayout(new FlowLayout());//流式布局

setTitle("Computer");

setSize(300,100);//大小

setLocationRelativeTo(null);//居中

setDefaultCloseOperation(EXIT_ON_CLOSE);

setVisible(true);

}

public static void main(String[] args) {//main方法,启动窗口

new DemoFrame();

}

public void actionPerformed(ActionEvent e) {

try{

double d1 = Double.parseDouble(jtf1.getText());

double d2 = Double.parseDouble(jtf2.getText());

jtf3.setText((d1+d2)+"");

}catch(Exception ex){

jtf3.setText("Error");//如果输入字母等.就在第三个文本框提示

//JOptionPane.showMessageDialog(this, "非法输入!!\n提示:请输入正确的两个数字");

}

}

}

测试

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