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小学生四则运算考试系统Java

扎眼的阳光 • • IT • 阅读 94

作为大一的新生,突然出现一个实训课程,让原本平静的生活变得很充实,学校要求写一个小学生四则运算考试系统的项目,包括自动出题、自动判断对错并给出得分、自动给出正确答案,同时还有倒计时,在经过几天的努力之后,我也是马马虎虎的完成了一个较为简单的考试系统

一共包含了四个类,代码如下:

下面一段代码是登陆界面的设计:

效果图:

0e8f745e311a4d7949084daf38bcdec8.png

 

import javax.swing.*;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

 

public class LoginJFrame extends JFrame {

JTextField jTextField1,jTextField2;//用户名 姓名

JPasswordField jPasswordField1;//密码

JComboBox<String> nianjiJC;

public static String zhang,mi,nian;//保存账号密码

public static String zhang1,mi1,nian1;//保存账号密码

 

 

public LoginJFrame(){

 

init();

initzujian();

 

this.setVisible(true);//可见

 

}

//基础属性设置

private void init(){

this.setLocationRelativeTo(null);//居中

this.setSize(300,350);//大小

this.setDefaultCloseOperation(2);//关闭模式

this.setTitle(“登录”);

this.setLayout(new FlowLayout());

}

//界面初始化

private void initzujian(){

 

JLabel yonghuming = new JLabel(“用户名”);

JLabel mima = new JLabel(“密码 “);

JLabel xingming = new JLabel(“姓名 “);

jTextField1 = new JTextField(25);//用户名

jPasswordField1 = new JPasswordField(25);//密码

jTextField2 = new JTextField(25);//姓名

 

this.add(yonghuming);

this.add(jTextField1);

this.add(mima);

this.add(jPasswordField1);

this.add(xingming);

this.add(jTextField2);

 

//年级设置

JLabel nianji = new JLabel(“年级 “);

String[] nj = {“一年级”,”二年级”,”三年级”,”四年级”,”五年级”,”六年级”};

nianjiJC = new JComboBox<>(nj);

add(nianji);

add(nianjiJC);

 

JButton dengluJButto = new JButton(“登录”);

JButton tuichuJButto = new JButton(“退出”);

 

JButton zhuceJButto = new JButton(“注册”);

add(dengluJButto);

add(tuichuJButto);

add(new JLabel(“如果你还没有注册,请先注册”));

add(zhuceJButto);

 

zhuceJButto.addActionListener(new zhuceAction());//注册按钮添加事件

dengluJButto.addActionListener(new dengluAction());

tuichuJButto.addActionListener(new tuichuAction());

 

 

 

}

 

 

//登录按钮的事件

class dengluAction implements ActionListener{

 

@Override

public void actionPerformed(ActionEvent e) {

boolean b1 = jTextField1.getText().equals(zhang) && jTextField2.getText().equals(mi) && nianjiJC.getSelectedItem().toString().trim().equals(nian);

boolean b2 = jTextField1.getText().equals(zhang1) && jTextField2.getText().equals(mi1) && nianjiJC.getSelectedItem().toString().trim().equals(nian1);

 

if (b1 || b2){

JOptionPane.showMessageDialog(null,”登陆成功”);

new MainJFrame();

MainJFrame.yonghu.setText(“当前用户为 :”+jTextField1.getText());

dispose();

}else if (jTextField1.getText().equals(“”) || jTextField2.getText().equals(“”)){

JOptionPane.showMessageDialog(null,”用户名或密码不能为空”);

}else {

JOptionPane.showMessageDialog(null,”用户名或密码错误”);

}

 

}

}

//退出按钮的事件

class tuichuAction implements ActionListener{

 

@Override

public void actionPerformed(ActionEvent e) {

dispose();

}

}

 

//注册按钮的事件

class zhuceAction implements ActionListener{

 

@Override

public void actionPerformed(ActionEvent e) {

dispose();

new RegisterJFrame();

 

}

}

 

public static void main(String[] args) {

new LoginJFrame();

}

}

对注册界面的设计:

效果图:

c5f2d5730f14f9a6111ddeba7234e50b.png

 

package 四则运算.考试系统界面;

 

import javax.swing.*;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

 

public class RegisterJFrame extends JFrame {

private JButton zhuceJButto,tuichuJButto;

private JLabel yonghuming,mima,mima1,xingming,xingbie;

private JTextField jTextField1,jTextFieldxingming;

private JRadioButton manJRadioButton,womanJRadioButton;

private JPasswordField jTextFieldmima,jTextFieldmima1;

private JComboBox<String> nianjiJC;

//构造方法

public RegisterJFrame(){

init();

initzujian();

initAction();

this.setVisible(true);

}

public void init(){

this.setSize(300,400);

this.setTitle(“注册”);

this.setLayout(new FlowLayout());

this.setLocationRelativeTo(null);

this.setDefaultCloseOperation(2);

 

}

public void initzujian(){

 

yonghuming = new JLabel(“用户名”);

mima = new JLabel(“设置密码 “);

mima1 = new JLabel(“再次设置密码”);

xingming = new JLabel(” 姓名 “);

xingbie = new JLabel(” 性别”);

 

jTextField1 = new JTextField(20);//用户名

jTextFieldxingming = new JTextField(20);//姓名

jTextFieldmima = new JPasswordField(20);//密码

jTextFieldmima1 = new JPasswordField(20);//密码1

 

//性别设置

manJRadioButton = new JRadioButton(“男”);

womanJRadioButton = new JRadioButton(“女”);

ButtonGroup bg = new ButtonGroup();

bg.add(manJRadioButton);

bg.add(womanJRadioButton);

this.add(yonghuming);

this.add(jTextField1);

this.add(mima);

this.add(jTextFieldmima);

this.add(mima1);

this.add(jTextFieldmima1);

this.add(xingming);

this.add(jTextFieldxingming);

 

add(xingbie);

add(manJRadioButton);

add(new JLabel(” “));

add(womanJRadioButton);

add(new JLabel(” “));

 

 

//年级设置

JLabel nianji = new JLabel(” 年级 “);

String[] nj = {“一年级”,”二年级”,”三年级”,”四年级”,”五年级”,”六年级”};

nianjiJC = new JComboBox<>(nj);

add(nianji);

add(new JLabel(” “));

add(nianjiJC);

add(new JLabel(” “));

 

tuichuJButto = new JButton(“退出”);

zhuceJButto = new JButton(“注册”);

add(zhuceJButto);

add(tuichuJButto);

tuichuJButto.addActionListener(new tuichuAction());

 

}

//事件处理的初始化

public void initAction(){

zhuceJButto.addActionListener(new zhuceAction());

 

 

 

}

//注册按钮的事件处理

class zhuceAction implements ActionListener {

 

@Override

public void actionPerformed(ActionEvent e) {

if (jTextField1.getText().equals(LoginJFrame.zhang) || jTextField1.getText().equals(LoginJFrame.zhang1)){

JOptionPane.showMessageDialog(null,”该用户名已存在”);

jTextField1.setText(“”);

 

}else if (jTextField1.getText().equals(“”) || jTextFieldmima.getText().equals(“”)){

JOptionPane.showMessageDialog(null,”请输入用户名和密码”);

}else if (!jTextFieldmima.getText().equals(jTextFieldmima1.getText())){

JOptionPane.showMessageDialog(null,”两次输入的密码不一致”);

}else if (LoginJFrame.zhang==null){

LoginJFrame.zhang = jTextField1.getText();

LoginJFrame.mi = jTextFieldmima.getText();

LoginJFrame.nian = nianjiJC.getSelectedItem().toString().trim();

JOptionPane.showMessageDialog(null,”注册成功,跳转登陆界面”);

dispose();

new LoginJFrame();

}else {

LoginJFrame.zhang1 = jTextField1.getText();

LoginJFrame.mi1 = jTextFieldmima.getText();

LoginJFrame.nian1 = nianjiJC.getSelectedItem().toString().trim();

JOptionPane.showMessageDialog(null,”注册成功1,跳转登陆界面”);

dispose();

new LoginJFrame();

}

 

 

}

}

 

//退出按钮的事件

class tuichuAction implements ActionListener{

 

@Override

public void actionPerformed(ActionEvent e) {

dispose();

new LoginJFrame();

}

}

public static void main(String[] args) {

new RegisterJFrame();

 

}

 

}

对主界面的设计:

效果图:

e8a9bd96b7faa465cf5b5997aa2eb9e6.png7e6eb764cf9003f8aaf32e0034b70ab4.png

 

import javax.swing.*;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

 

public class MainJFrame extends JFrame {

//private JButton againJButton,exitJButton;//按钮属性

public static JLabel yonghu;

 

//构造方法,完成初始化界面

public MainJFrame() {

init();//界面基础设置

initNorth();//北侧布局

initWest();//左侧布局

initCenter();//中间界面

initEast();//东侧布局

initSouth();

this.setVisible(true);//设置可见

 

 

}

 

 

 

//初始化界面的方法

private void init() {

this.setSize(800, 600);//设置大小

this.setLocationRelativeTo(null);//居中

this.setDefaultCloseOperation(2);//设置关闭模式

this.setTitle(“小学生四则运算测试系统-郑州轻工业大学-***-开发,****..”);//设置标题

 

 

}

 

//左侧布局

private void initWest(){

JPanel jPanelWest = new JPanel();

jPanelWest.setBackground(Color.cyan);//背景色

//退出按钮

JButton tuichu = new JButton(“退出”);

jPanelWest.add(tuichu);

this.add(jPanelWest,BorderLayout.WEST);

tuichu.addActionListener(new tuichuAction());

 

 

}

 

//北侧布局

private void initNorth(){

//最上面的提示

JPanel jPanelNorth = new JPanel();

JLabel beixinxi = new JLabel(“欢迎使用小学生四则运算测试系统”);

beixinxi.setForeground(Color.green);

jPanelNorth.setBackground(Color.blue);//背景色

jPanelNorth.add(beixinxi);

this.getContentPane().add(jPanelNorth,BorderLayout.NORTH);

}

//中间布局

private void initCenter(){

JTabbedPane pcenter = new JTabbedPane();//选项卡面板

//基础运算选项卡

JPanel jichuJPanel = new jichuJPanel();//new 的对象是一个jpanel界面

jichuJPanel.setPreferredSize(new Dimension(500,500));

//整数混合运算选项卡

JPanel zhengshuhunheJPanel = new JPanel();

zhengshuhunheJPanel.setPreferredSize(new Dimension(500,500));

//小数混合运算选项卡

JPanel xiaoshuhunheJPanel = new JPanel();//整数混合运算

xiaoshuhunheJPanel.setPreferredSize(new Dimension(500,500));

 

pcenter.add(“基础运算”,jichuJPanel);

pcenter.add(“整数混合运算”,zhengshuhunheJPanel);

pcenter.add(“小数混合运算”,xiaoshuhunheJPanel);

 

 

add(pcenter,BorderLayout.CENTER);

 

 

}

//东侧布局

public void initEast(){

JPanel jPanelEast = new JPanel();

jPanelEast.setLayout(new BorderLayout());

jPanelEast.setPreferredSize(new Dimension(100,600));

yonghu = new JLabel(” 当前用户为 : “);

 

jPanelEast.add(yonghu,BorderLayout.CENTER);

this.add(jPanelEast,BorderLayout.EAST);

 

}

//南侧布局

private void initSouth(){

JPanel jPanelSouth = new JPanel();

jPanelSouth.setPreferredSize(new Dimension(100,50));

jPanelSouth.setLayout(new FlowLayout());

 

jPanelSouth.add(new JLabel(“郑州轻工业大学 “));

 

 

jPanelSouth.add(new JLabel(“软件学院”));

jPanelSouth.add(new JLabel(“Copyright 2022”));

jPanelSouth.setBackground(Color.LIGHT_GRAY);

add(jPanelSouth,BorderLayout.SOUTH);

}

//退出按钮的事件

class tuichuAction implements ActionListener{

 

@Override

public void actionPerformed(ActionEvent e) {

dispose();

new LoginJFrame();

}

}

 

public static void main(String[] args) {

new MainJFrame();

}

 

}

中间布局代码:


package 四则运算.考试系统界面;

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

//基础运算界面
public class jichuJPanel extends JPanel{
    public JButton chutiJButton, tijiaoJButton, zailaiJButton;
    private JLabel[] JLBQuestion = new JLabel[5];
    private JLabel[] test;
    private JTextField[] text;
    int[] score = new int[5];
    private JLabel j2 = new JLabel("倒计时:  20 秒");
    private JLabel[] daan = new JLabel[5];


    //构造方法
    public jichuJPanel() {
        this.setLayout(new GridLayout(8, 4));

        initJButton();//按钮初始化
        initQuestion();//题目初始化
    }

    //按钮初始化
    public void initJButton() {
        chutiJButton = new JButton("出题");
        tijiaoJButton = new JButton("提交");
        zailaiJButton = new JButton("再来一次");
        add(chutiJButton);
        add(new JLabel());
        add(tijiaoJButton);
        add(zailaiJButton);

        chutiJButton.addActionListener(new chutiAction());
        zailaiJButton.addActionListener(new zaishiyiciAction());
        tijiaoJButton.addActionListener(new tijiaoAction());

    }

    //题目初始化
    public void initQuestion() {
//text是文本框  test是题目
        test = new JLabel[5];
        text = new JTextField[5];

        for (int i = 0; i < 5; i++) {
            test[i] = new JLabel("题目" + (i + 1) + " :     ");
            text[i] = new JTextField(15);
            JLBQuestion[i] = new JLabel(" ");
            add(test[i]);
            add(JLBQuestion[i]);
            daan[i] = new JLabel("");
            add(text[i]);
            add(daan[i]);

        }
        //对倒计时label的设置
        add(new JLabel());
        add(new JLabel());
        j2.setForeground(Color.red);
        j2.setFont(new Font("微软雅黑", Font.BOLD, 20));
        add(j2);
        add(new JLabel());

    }


    //再试一次按钮事件
    class zaishiyiciAction implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            for (int i = 0; i < 5; i++) {
                daan[i].setText("");
                text[i].setText("");

            }
            i = 20;
            LimitTime t = new LimitTime();
            t.start();
        }

    }


    //出题按钮的事件
    class chutiAction implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            i = 20;
            LimitTime t = new LimitTime();
            t.start();

            for (int i = 0; i < 5; i++) {
                JLBQuestion[i].setText(new question().getRandom()[i]);
                score[i] = question.calculation(question.getX()[i], question.getY()[i], question.getJ()[i]);
                daan[i].setText("");
                text[i].setText("");
            }

        }

    }

    //提交按钮的事件
    class tijiaoAction implements ActionListener {

        @Override
        public void actionPerformed(ActionEvent e) {
            if (JLBQuestion[1].getText().equals(JLBQuestion[2].getText())){
                JOptionPane.showMessageDialog(null,"请先出题");
            }else {
                defen();
                i = -5;
                j2.setText("答案已提交");

            }

        }
    }
    int i = 20;
    //倒计时
    class LimitTime extends Thread{

        public void run()
        {

            II:
            while (true){
                while( i >= 0)
                {
                    j2.setText("倒计时:  "+i+" 秒");
                    try {
                        sleep(1000);
                    } catch (InterruptedException e) {
                        JFrame jf = new JFrame();
                        JOptionPane.showMessageDialog(jf,"出现了未知问题，请重启程序");
                    }
                    i--;
                    if (i<=-4){
                        break II;
                    }
                }
                defen();//执行提交
                j2.setText("答案已自动提交");
                break ;
            }

        }
    }


    //判断分数
    private void defen(){
        try {
            int fenshu = 0;
            for (int i = 0; i < 5; i++) {
//                System.out.println(score[i]+" ");
                if (text[i].getText().equals("")){
                    daan[i].setText("正确答案是"+score[i]+"  错误");
                    continue;
                }
                if (score[i] == Integer.parseInt(text[i].getText())){
                    daan[i].setText("回答正确");
                    fenshu += 20;
                }else {
                    daan[i].setText("正确答案是"+score[i]+"  错误");
                }
            }
            JOptionPane.showMessageDialog(null,"你这次测试总分为:"+fenshu);
        }catch (Exception e2){
            JOptionPane.showMessageDialog(null,"请按照正确的格式输入答案");
        }
    }
}

下面是对题目的设计类:

package 四则运算.考试系统界面;

 

public class question {

public static int[] x = new int[5];

public static int[] y = new int[5];

public static int[] j = new int[5];

 

 

//自定义方法，进行运算符的获取

public static String getOp(int k) {

String str=””;

switch(k) {

case 1:str = “+”;

break;

case 2:str = “-“;

break;

case 3:str = “*”;

break;

case 4:str = “/”;

break;

}

return str;

}

 

//自定义方法，计算正确的答案

public static int calculation(int a, int b, int k){

int sum=0;

switch(k) {

case 1:sum=a+b;

break;

case 2:sum=a-b;

break;

case 3:sum=a*b;

break;

case 4:sum=a/b;

break;

}

return sum;

}

//获取随机数

public static String[] getRandom(){

 

String[] st = new String[5];

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

int a = (int)(Math.random()*10+1);

x[i] = a;

int b = (int)(Math.random()*10+1);

y[i] = b;

int k = (int)(Math.random()*4+1);//获取运算符

j[i] = k;

 

st[i] = a+” “+getOp(k)+” “+b+” = “;

}

 

 

 

return st;

}

public static int[] getX(){

return x;

}

public static int[] getY(){

return y;

}public static int[] getJ(){

return j;

}

 

public static void main(String[] args) {

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

System.out.println(x[i]+” “+j[i]+” “+y[i]);

}

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

System.out.println(x[i]+” “+getOp(j[i])+” “+y[i]);

}

}

 

}

 

 

如果要使用,只需自己创建四个类,将上面代码复制一下就可以了,注意类名要保持一致

希望大家喜欢,如果有疑问可以评论告诉我,一定会及时解答

链接：https://pan.baidu.com/s/1lAeXTY5Pbsp7DFSevV81DQ 
提取码：hmok

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