生成随机数学算式可谓是计算机领域的一个经典的问题,
本文使用JFrame,JButton,JTextField等java图形化工具,生成一个可以随机切换题目,可以实现计时功能的一个图形化界面
源代码展示
randomMath类
package login;
import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.ArrayList;
import java.util.Random;
//Author:XYu1230
//Time:2024/10/10
public class randomMath extends JFrame implements MouseListener {
ArrayList<Integer> ans = new ArrayList<>(30);
ArrayList<JTextField> res = new ArrayList<>();
JButton pd = new JButton("查看评分");
JButton jb1 = new JButton("切换题目");
JButton jb2 = new JButton("计时功能");
JFrame time = new JFrame();
JTextField inputTime = new JTextField();
JButton jb3 = new JButton("确认");
// 程序主体代码
public randomMath(){
initJFrame();
initView();
this.setVisible(true);
}
public void calculateScore(){
int score = 0;
for (int i = 0; i < ans.size(); i++) {
if(ans.get(i).toString().equals(res.get(i).getText())){
score++;
}
}
double accuracy = score*1.0 / 20;
String text = "错题数:" + (20 - score) + "\n" +
" 你的正确率为:" + accuracy ;
// String s = "SELECT t.*\n" +
// " FROM lxy.user t\n" +
// " LIMIT 501"
showJDialog(text);
}
public void testTimer(long t){
MyTimer timer = new MyTimer();
timer.schedule(new Runnable() {
@Override
public void run() {
//System.out.println("666666");
calculateScore();
}
},t);
}
public void initView() {
this.getContentPane().removeAll();
for (int i = 1; i <= 5; i++) {
for (int j = 1; j <= 4; j++) {
JLabel j1 = new JLabel(rMath());
JTextField result = new JTextField();
result.setBounds(i*150+50,j*80,80,30);
j1.setBounds(i*150,j*80,80,30);
this.getContentPane().add(j1);
this.getContentPane().add(result);
res.add(result);
}
}
pd.setBounds(450,400,120,30);
Font font = new Font("Serif",Font.BOLD,20);
pd.setFont(font);
this.getContentPane().add(pd);
pd.addMouseListener(this); //添加鼠标监听
jb1.setBounds(10,500,120,30);
this.getContentPane().add(jb1);
jb1.addMouseListener(this);
jb2.setBounds(10,450,120,30);
this.getContentPane().add(jb2);
jb2.addMouseListener(this);
System.out.println("-------------");
for (int i = 0; i < ans.size(); i++) {
System.out.println(ans.get(i));
}
this.getContentPane().repaint();
}
public void initJFrame() {
this.setSize(1000, 600);//设置宽高
this.setTitle("20道随机计算题");//设置标题
this.setDefaultCloseOperation(3);//设置关闭模式
this.setLocationRelativeTo(null);//居中
this.setAlwaysOnTop(true);//置顶
this.setLayout(null);//取消内部默认布局
}
//设置弹窗
public void showJDialog(String content) {
//创建一个弹框对象
JDialog jDialog = new JDialog();
//给弹框设置大小
jDialog.setSize(500, 200);
//让弹框置顶
jDialog.setAlwaysOnTop(true);
//让弹框居中
jDialog.setLocationRelativeTo(null);
//弹框不关闭永远无法操作下面的界面
jDialog.setModal(true);
//创建Jlabel对象管理文字并添加到弹框当中
JLabel warning = new JLabel(content);
warning.setBounds(0, 0, 200, 150);
jDialog.getContentPane().add(warning);
//让弹框展示出来
jDialog.setVisible(true);
}
//生成算式
public String rMath(){
Random r = new Random();
Character[] chArr = {'+','-','*','/'};
int first,second;
char c;
int index = 0;
while(true){
first = r.nextInt(100);
second = r.nextInt(99)+1;
c = chArr[r.nextInt(4)];
if(c == '/' && first % second != 0) continue;
else if(c == '*' && first * second > 999) continue;
else if(c == '-' && first - second < 0) continue;
else {
if(c == '+') ans.add(first + second);
else if(c == '-') ans.add(first - second);
else if(c == '*') ans.add(first * second);
else if(c == '/') ans.add(first / second);
break;
}
}
String s = (first +""+ c+ "" + second + " = ").toString();
return s;
}
public void initTimeSet(){
time.setSize(500, 300);//设置宽高
time.setTitle("计时设置");//设置标题
time.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);//设置关闭模式
time.setLocationRelativeTo(null);//居中
time.setAlwaysOnTop(true);//置顶
time.setLayout(null);//取消内部默认布局
inputTime.setBounds(150,100,200,30);
time.getContentPane().add(inputTime);
JLabel jl1 = new JLabel("定时时间");
jl1.setBounds(100,100,80,30);
time.getContentPane().add(jl1);
jb3.setBounds(180,200,80,30);
time.getContentPane().add(jb3);
jb3.addMouseListener(this);
time.setVisible(true);
}
@Override
public void mouseClicked(MouseEvent e) {
if(e.getSource() == pd){
calculateScore();
}
else if(e.getSource() == jb1){
ans.clear();
res.clear();
System.out.println(ans);
initView();
}
else if(e.getSource() == jb2){
initTimeSet();
}
else if(e.getSource() == jb3){
String text = inputTime.getText();
testTimer(Long.parseLong(text));
showJDialog("计时开始");
time.setVisible(false);
}
}
@Override
public void mousePressed(MouseEvent e) {
}
@Override
public void mouseReleased(MouseEvent e) {
}
@Override
public void mouseEntered(MouseEvent e) {
}
@Override
public void mouseExited(MouseEvent e) {
}
}
测试类
package login;
import java.sql.Time;
import java.util.TimerTask;
public class randomMathTest {
public static void main(String[] args) {
new randomMath();
}
}
测试结果展示
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