日期：2018.10.07
星期五
博客期：015
Part1:----------------第一个是二柱子出30道小学数学题：
一、程序设计思想
本程序设计由三部分构成，第一部分因为循环30次的需要，做出for语句来循环30次，从流程图中看也清晰明了，所以只需要在循环里输出语句就好了，这一部分分为生成处理和输出处理两部分！生成处理部分，就是利用Random类生成随机数的方法，生成1000以内的两个正整数m和n，在生成随机字符c的时候，先得到0~3的随机数，然后分别代表‘+’、‘-’、‘*’和‘/’四个字符！之后按照格式输出即可！
二、程序流程图
三、源程序
1 package ready;
2
3 import java.util.Random;
4
5 public class Test {
6 //============================<数据区>=================================//
7 //左操作数
8 private int leftNumber;
9 //右操作数
10 private int rightNumber;
11 //运算符
12 private char operator;
13 //============================<方法区>=================================//
14 //--------------------------------主函数
15 public static void main(String[] args) {
16 for(int i=1;i<=30;i++)
17 {
18 Test n = new Test(true);
19 System.out.print(i+"、 ");
20 n.display_s(false);
21 }
22 }
23 //--------------------------------set、get函数
24 //---[operator的set、get函数]
25 public void setOperator(char operator) {
26 this.operator = operator;
27 }
28 public char getOperator() {
29 return operator;
30 }
31 //---[RightNumber的set、get函数]
32 public void setRightNumber(int rightNumber) {
33 this.rightNumber = rightNumber;
34 }
35 public int getRightNumber() {
36 return rightNumber;
37 }
38 //---[LeftNumber的set、get函数]
39 public void setLeftNumber(int leftNumber) {
40 this.leftNumber = leftNumber;
41 }
42 public int getLeftNumber() {
43 return leftNumber;
44 }
45 //--------------------------------展示函数
46 public void display(){
47 System.out.print(leftNumber+" "+operator+" "+rightNumber);
48 }
49 public void display_s(){
50 System.out.println(leftNumber+" "+operator+" "+rightNumber);
51 }
52 public void display(boolean x){
53 if(x)
54 System.out.print(leftNumber+" "+operator+" "+rightNumber+" = "+answer());
55 else
56 System.out.print(leftNumber+" "+operator+" "+rightNumber+" = ");
57 }
58 public void display_s(boolean x){
59 if(x)
60 System.out.println(leftNumber+" "+operator+" "+rightNumber+" = "+answer());
61 else
62 System.out.println(leftNumber+" "+operator+" "+rightNumber+" = ");
63 }
64 //--------------------------------运行函数
65 //返回结果
66 public int answer(){
67 int result = 0;
68 switch(operator)
69 {
70 case ‘+‘:result=leftNumber+rightNumber;break;
71 case ‘*‘:result=leftNumber*rightNumber;break;
72 case ‘/‘:result=leftNumber/rightNumber;break;
73 case ‘-‘:result=leftNumber-rightNumber;break;
74 default:break;
75 }
76 return result;
77 }
78 //--------------------------------构造函数
79 public Test(){
80 leftNumber = 0;
81 operator = ‘+‘;
82 rightNumber = 0;
83 }
84 public Test(boolean x){
85 Random ra = new Random();
86 leftNumber = ra.nextInt(1000)+1;
87 int temp = ra.nextInt(4);
88 switch(temp)
89 {
90 case 0:operator = ‘+‘;break;
91 case 1:operator = ‘-‘;break;
92 case 2:operator = ‘*‘;break;
93 case 3:operator = ‘/‘;break;
94 }
95 rightNumber = ra.nextInt(1000)+1;
96 }
97 public Test(int leftnum,char oper,int rightnum){
98 leftNumber = leftnum;
99 operator = oper;
100 rightNumber = rightnum;
101 }
102 }
四、实现结果截图
五、实验总结
本次程序老师要求在20分钟以内完成，实际上还是存在一些问题的！比如说输出问题，以及小学二年级的数学题目究竟是怎样的！应该如何去遍历这个“软件”，需不需要加入“ = ”，输出格式多一个换行等等的问题都需要解决的！
Part2:----------------第二个是窗口验证码的问题：
一、程序设计思想
本程序只是实现了验证码功能！就难度而言，不难！但是就复杂度而言，算是比较繁杂的了！程序需要制作一个窗口，并对其构成容器，再在容器里添加内部项，添加按钮、添加标签和输入框！对成员逐一进行排版，格式设置！对按钮添加监听器，当按下按钮时，刷新程序的验证码！
二、程序流程图
三、源程序
1 package ready;
2
3 import java.awt.Container;
4 import java.awt.FlowLayout;
5 import java.awt.event.ActionEvent;
6 import java.awt.event.ActionListener;
7 import java.io.IOException;
8 //import java.awt.Image;
9 import java.util.Random;
10
11 //import javax.swing.ImageIcon;
12 import javax.swing.JButton;
13 import javax.swing.JFrame;
14 import javax.swing.JLabel;
15 import javax.swing.JTextField;
16
17 public class Window extends JFrame{
18 //=============================<数据区>====================================//
19 //---------------[自动生成]
20 private static final long serialVersionUID = -2971058395175770886L;
21 //---------------[截取随机数]
22 protected Random ra = new Random();
23 //---------------[验证码字符]
24 private final char[] CHAR_CODE = { ‘1‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘, ‘6‘,
25 ‘7‘, ‘8‘, ‘9‘, ‘a‘, ‘b‘, ‘c‘, ‘d‘, ‘e‘, ‘f‘, ‘g‘, ‘h‘, ‘i‘, ‘j‘,
26 ‘k‘, ‘m‘, ‘n‘, ‘p‘, ‘q‘, ‘r‘, ‘s‘, ‘t‘, ‘u‘, ‘v‘, ‘w‘, ‘x‘, ‘y‘,
27 ‘z‘, ‘A‘, ‘B‘, ‘C‘, ‘D‘, ‘E‘, ‘F‘, ‘G‘, ‘H‘, ‘I‘, ‘J‘, ‘K‘, ‘L‘,
28 ‘M‘, ‘N‘, ‘P‘, ‘Q‘, ‘R‘, ‘S‘, ‘T‘, ‘U‘, ‘V‘, ‘W‘, ‘X‘, ‘Y‘, ‘Z‘ };
29 //---------------[标识]
30 protected JLabel firstSay = new JLabel("登录名：");
31 protected JLabel secondSay = new JLabel(" 密码：");
32 protected JLabel thirdSay = new JLabel("验证码：");
33 //---------------[按钮]
34 protected JButton getIn = new JButton(" 登陆 ");
35 protected JButton setIn = new JButton(" 快速注册 ");
36 protected JButton resettitle = new JButton(" 刷新 ");
37 //---------------[输入框]
38 protected JTextField firstTitle = new JTextField(10);
39 protected JTextField secondTitle = new JTextField(10);
40 protected JTextField thirdTitle = new JTextField(10);
41 protected JTextField rentlyWords = new JTextField(5);
42 //=============================<方法区>====================================//
43 //---------------[主方法]
44 public static void main(String[] args) throws IOException{
45 new Window();
46 }
47 //---------------[构造方法]
48 public Window() throws IOException{
49 this.setVisible(true);
50 Container c = this.getContentPane();
51 this.setResizable(false);
52 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
53 this.getContentPane().setLayout(new FlowLayout());
54 this.add(thirdTitle);
55 this.setLocation(1000,500);
56 this.setSize(400,380);
57 this.setTitle("请登录");
58 JLabel t = new JLabel(" ");
59 firstSay.setFont(new java.awt.Font("Dialog",1,25));
60 secondSay.setFont(new java.awt.Font("Dialog",1,25));
61 thirdSay.setFont(new java.awt.Font("Dialog",1,25));
62 firstTitle.setFont(new java.awt.Font("Dialog",2,25));
63 secondTitle.setFont(new java.awt.Font("Dialog",2,25));
64 thirdTitle.setFont(new java.awt.Font("Dialog",2,25));
65 setIn.setFont(new java.awt.Font("Dialog",1,25));
66 getIn.setFont(new java.awt.Font("Dialog",1,25));
67 resettitle.setFont(new java.awt.Font("Dialog",1,25));
68 rentlyWords.setFont(new java.awt.Font("Dialog",5,25));
69 firstTitle.setText("用户名/邮箱");
70 c.add(firstSay);
71 c.add(firstTitle);
72 c.add(t);
73 c.add(secondSay);
74 c.add(secondTitle);
75 t = new JLabel(" ");
76 c.add(t);
77 c.add(thirdSay);
78 c.add(thirdTitle);
79 t = new JLabel(" ");
80 c.add(t);
81 rentlyWords.setEditable(false);
82 Reset();
83 resettitle.setBorderPainted(false);
84 c.add(rentlyWords);
85 c.add(resettitle);
86 requestFocus();
87 t = new JLabel(" ");
88 c.add(t);
89 c.add(getIn);
90 t = new JLabel(" ");
91 c.add(t);
92 c.add(setIn);
93 resettitle.addActionListener//为转换按钮添加监听事件
94 (
95 new ActionListener()
96 {
97 public void actionPerformed(ActionEvent arg0){
98 Reset();
99 }
100 }
101 );
102 }
103 //---------------[返回随机字符]
104 public final char getRandom(){
105 int temp = ra.nextInt(58);
106 return CHAR_CODE[temp];
107 }
108 //---------------[设置随机码]
109 public void Reset(){
110 rentlyWords.setText(getRandom()+""+getRandom()+""+getRandom()+""+getRandom());
111 }
112 }
四、实现结果截图
五、实验总结
本次实验相当的顺利，虽然没有用老师要求的RandomStr类来自动生成验证码字符串，不过效果是一样的！用Random配合类型转化一样可以生成验证码字符串，对文本框的排版也是很大的问题！因为在这之前的程序我都没有设计过界面的排版！
原文地址：https://www.cnblogs.com/onepersonwholive/p/9751137.html
时间： 2024-10-09 05:10:54