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【作业报告】作业5 四则运算测试与封装 5.1 改进版

驾驶员：许佳豪

领航员：吴哲永博客地址：http://www.cnblogs.com/dbssb/

主类：

 1 package 四则运算;
 2 
 3 public class Test {
 4 
 5     public static void main(String[] args) {
 6         
 7         MyFrame a=new MyFrame();
 8 
 9     }
10 
11 }

窗体类：

  1 package 四则运算;
  2 
  3 import java.*;
  4 import java.util.*;
  5 
  6 import javax.swing.*;
  7 
  8 import java.awt.*;
  9 import java.awt.event.*;
 10 import java.io.*;
 11 
 12 public class MyFrame extends JFrame
 13 {
 14     JMenuBar M1=new JMenuBar();
 15     JMenu M2=new JMenu("更换颜色");
 16     JMenuItem M3=new JMenuItem("黄色");
 17     JMenuItem M4=new JMenuItem("橙色");
 18     JMenuItem M5=new JMenuItem("白色");
 19     JMenuItem M6=new JMenuItem("蓝色");
 20     JMenuItem M7=new JMenuItem("绿色");
 21     JLabel L1=new JLabel("请输入题数（最多不超过5题）：");
 22     JLabel L2=new JLabel("第一题：");
 23     JLabel L3=new JLabel("   =   ");
 24     JLabel L4=new JLabel("第二题：");
 25     JLabel L5=new JLabel("   =   ");
 26     JLabel L6=new JLabel("第三题：");
 27     JLabel L7=new JLabel("   =   ");
 28     JLabel L8=new JLabel("第四题：");
 29     JLabel L9=new JLabel("   =   ");
 30     JLabel L10=new JLabel("第五题：");
 31     JLabel L11=new JLabel("   =   ");
 32     JLabel L12=new JLabel("欢迎您，尊敬的 ");
 33     JLabel L13=new JLabel("用户");
 34     JLabel L14=new JLabel("");
 35     JLabel L15=new JLabel("           ");
 36     JLabel L16=new JLabel("   ");
 37     JLabel L17=new JLabel("   ");
 38     JLabel L18=new JLabel("");
 39     JLabel L19=new JLabel("                               ");
 40     JTextField[]T={
 41             new JTextField(12),new JTextField(12),new JTextField(12),new JTextField(12),new JTextField(12),new JTextField(8),new JTextField(8),new JTextField(8),new JTextField(8),new JTextField(8),new JTextField(5)
 42         };
 43     JButton B1=new JButton("开始答题");
 44     JButton B2=new JButton("提交");
 45     
 46     JFrame f=new JFrame();
 47     
 48     String username=new String();
 49     int i;
 50     int k;
 51     int n;
 52     long begintime;
 53     long endtime;
 54     long time;
 55     int[]a=new int[5];
 56     int[]b=new int[5];
 57     int[]c=new int[5];
 58     int[]d=new int[5];
 59     int[]answer=new int[5];
 60     
 61     
 62     public MyFrame() 
 63     {
 64         getContentPane().setBackground(Color.WHITE);
 65         this.setVisible(true);
 66         this.setTitle("四则运算答题");
 67         Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
 68         setBounds((d.width - 502) / 2, (d.height - 450) / 2, 502, 450);
 69         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 70         this.setResizable(false);
 71         getContentPane().setLayout(new FlowLayout(FlowLayout.CENTER, 12, 10));
 72         setJMenuBar(M1);
 73         M1.add(M2);
 74         M2.add(M3);
 75         M2.add(M4);
 76         M2.add(M5);
 77         M2.add(M6);
 78         M2.add(M7);
 79         L12.setForeground(Color.RED);
 80         L12.setFont(new Font("宋体", Font.BOLD, 25));
 81         getContentPane().add(L12);
 82         L13.setForeground(SystemColor.textHighlight);
 83         L13.setFont(new Font("宋体", Font.BOLD, 25));
 84         getContentPane().add(L13);
 85         L1.setFont(new Font("宋体", Font.PLAIN, 20));
 86         getContentPane().add(L1);
 87         T[10].setFont(new Font("宋体", Font.PLAIN, 20));
 88         getContentPane().add(T[10]);
 89         B1.setFont(new Font("宋体", Font.PLAIN, 20));
 90         getContentPane().add(B1);
 91         L2.setFont(new Font("宋体", Font.PLAIN, 20));
 92         getContentPane().add(L2);
 93         T[0].setFont(new Font("宋体", Font.PLAIN, 20));
 94         getContentPane().add(T[0]);
 95         L3.setFont(new Font("宋体", Font.PLAIN, 20));
 96         getContentPane().add(L3);
 97         T[5].setFont(new Font("宋体", Font.PLAIN, 20));
 98         getContentPane().add(T[5]);
 99         L4.setFont(new Font("宋体", Font.PLAIN, 20));
100         getContentPane().add(L4);
101         T[1].setFont(new Font("宋体", Font.PLAIN, 20));
102         getContentPane().add(T[1]);
103         L5.setFont(new Font("宋体", Font.PLAIN, 20));
104         getContentPane().add(L5);
105         T[6].setFont(new Font("宋体", Font.PLAIN, 20));
106         getContentPane().add(T[6]);
107         L6.setFont(new Font("宋体", Font.PLAIN, 20));
108         getContentPane().add(L6);
109         T[2].setFont(new Font("宋体", Font.PLAIN, 20));
110         getContentPane().add(T[2]);
111         L7.setFont(new Font("宋体", Font.PLAIN, 20));
112         getContentPane().add(L7);
113         T[7].setFont(new Font("宋体", Font.PLAIN, 20));
114         getContentPane().add(T[7]);
115         L8.setFont(new Font("宋体", Font.PLAIN, 20));
116         getContentPane().add(L8);
117         T[3].setFont(new Font("宋体", Font.PLAIN, 20));
118         getContentPane().add(T[3]);
119         L9.setFont(new Font("宋体", Font.PLAIN, 20));
120         getContentPane().add(L9);
121         T[8].setFont(new Font("宋体", Font.PLAIN, 20));
122         getContentPane().add(T[8]);
123         L10.setFont(new Font("宋体", Font.PLAIN, 20));
124         getContentPane().add(L10);
125         T[4].setFont(new Font("宋体", Font.PLAIN, 20));
126         getContentPane().add(T[4]);
127         L11.setFont(new Font("宋体", Font.PLAIN, 20));
128         getContentPane().add(L11);
129         T[9].setFont(new Font("宋体", Font.PLAIN, 20));
130         getContentPane().add(T[9]);
131         L14.setFont(new Font("宋体", Font.PLAIN, 20));
132         getContentPane().add(L14);
133         L19.setFont(new Font("宋体", Font.PLAIN, 20));
134         getContentPane().add(L19);
135         B2.setFont(new Font("宋体", Font.PLAIN, 20));
136         getContentPane().add(B2);
137         L15.setFont(new Font("宋体", Font.PLAIN, 20));
138         getContentPane().add(L15);
139         L16.setFont(new Font("宋体", Font.PLAIN, 20));
140         getContentPane().add(L16);
141         L14.setFont(new Font("宋体", Font.PLAIN, 20));
142         getContentPane().add(L14);
143         L17.setFont(new Font("宋体", Font.PLAIN, 20));
144         getContentPane().add(L17);
145         L18.setFont(new Font("宋体", Font.PLAIN, 20));
146         getContentPane().add(L18);
147         
148         File file=new File("用户名.txt");
149         if(!file.exists())
150         {
151             try
152              {
153                 file.createNewFile();
154             }
155             catch (IOException e)
156             {
157                 e.printStackTrace();
158             }
159             Inputname b=new Inputname();
160         }
161         else
162         {
163             String str1=new String("");; 
164             int i=0;
165             BufferedReader br = null;
166             try 
167             {
168                 br = new BufferedReader(new FileReader(file.getName()));
169             } 
170             catch (FileNotFoundException e1) 
171             {
172                 e1.printStackTrace();
173             }
174             try 
175             {
176                 while((str1=br.readLine())!=null)
177                 {
178                     username=str1;
179                 }
180             }
181             catch (IOException e)
182             {
183                 e.printStackTrace();
184             }
185             try 
186             {
187                 br.close();
188             } 
189             catch (IOException e) 
190             {
191                 e.printStackTrace();
192             }
193             if(username.length()==0)
194             {
195                 Inputname b=new Inputname();
196             }
197             else
198             {
199                 L13.setText(username);
200             }
201         }
202         
203         B1.addActionListener(new Action());
204         B2.addActionListener(new Action());
205         M3.addActionListener(new Action());
206         M4.addActionListener(new Action());
207         M5.addActionListener(new Action());
208         M6.addActionListener(new Action());
209         M7.addActionListener(new Action());
210     }
211     
212     public class Action implements ActionListener
213     {
214 
215         public void actionPerformed(ActionEvent e) 
216         {
217             try
218             {
219                 if(e.getSource()==B1)
220                 {
221                     for(k=0;k<10;k++)
222                     {
223                         T[k].setText(null);
224                     }
225                     L15.setText("           ");
226                     L16.setText(null);
227                     L17.setText(null);
228                     L18.setText("");
229                     i=0;
230                     
231                     if(T[10].getText().length()==0)
232                     {
233                         JOptionPane.showMessageDialog(f,"请输入题数！");
234                     }
235                     else if(Integer.parseInt(T[10].getText())>5)
236                     {
237                         JOptionPane.showMessageDialog(f,"题数最多不超过5！");
238                     }
239                     else
240                     {
241                         i=Integer.parseInt(T[10].getText());
242                         
243                         for(k=0;k<i;k++)
244                         {
245                             a[k]=(int)(Math.random()*201-100);
246                             b[k]=(int)(Math.random()*201-100);
247                             c[k]=(int)(Math.random()*5);
248                             d[k]=(int)(Math.random()*12+1);
249                             Core core=new Core(a[k],b[k],c[k],d[k]);
250                             answer[k]=core.calc();
251                             T[k].setText(core.toString());
252                             
253                         }
254                         begintime = System.currentTimeMillis();
255                     }
256                 }
257             }catch(NumberFormatException u)
258             {
259                 JOptionPane.showMessageDialog(f,"请输入正确的数字！");
260             }
261             
262             if(e.getSource()==B2)
263             {
264                 if(i==0)
265                 {
266                     JOptionPane.showMessageDialog(f,"请先进行答题！");
267                 }
268                 else
269                 {
270                     endtime = System.currentTimeMillis();
271                     time=(endtime-begintime)/1000;
272                     n=0;
273                     for(k=0;k<i;k++)
274                     {
275                         if(T[k+5].getText().length()==0)
276                         {
277                             continue;
278                         }
279                         try
280                         {
281                             if(answer[k]==Integer.parseInt(T[k+5].getText()))
282                             {
283                                 n++;
284                             }
285                         }catch(NumberFormatException u)
286                         {
287                             JOptionPane.showMessageDialog(f,"请输入正确的数字！");
288                         }
289                         
290                     }
291                     L15.setText("你答对了："+n+"道题");
292                     L16.setText("你答错了："+(i-n)+"道题");
293                     L14.setText("用时："+time+"秒");
294                     L17.setText("参考答案：");
295                     for(k=0;k<i;k++)
296                     {
297                         L18.setText(L18.getText()+answer[k]+";");
298                     }
299                     i=0;
300                 }
301             }
302             
303             if(e.getSource()==M3)
304             {
305                 getContentPane().setBackground(Color.YELLOW);
306             }
307             if(e.getSource()==M4)
308             {
309                 getContentPane().setBackground(Color.ORANGE);
310             }
311             if(e.getSource()==M5)
312             {
313                 getContentPane().setBackground(Color.WHITE);
314             }
315             if(e.getSource()==M6)
316             {
317                 getContentPane().setBackground(Color.BLUE);
318             }
319             if(e.getSource()==M7)
320             {
321                 getContentPane().setBackground(Color.GREEN);
322             }
323         }
324         
325         
326     }
327     
328     public class Inputname extends JFrame
329     {
330         JLabel L1=new JLabel("请输入您的用户名：");
331         JTextField T1=new JTextField(17);
332         JButton B1=new JButton("确定");
333         JButton B2=new JButton("关闭");
334         
335         JFrame f=new JFrame();
336         
337         public Inputname()
338         {
339             this.setVisible(true);
340             this.setTitle("输入用户名");
341             Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
342             setBounds((d.width - 241) / 2, (d.height - 138) / 2, 242, 146);
343             setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
344             this.setResizable(false);
345             getContentPane().setLayout(new FlowLayout(FlowLayout.CENTER, 20, 6));
346             L1.setFont(new Font("宋体", Font.PLAIN, 20));
347             getContentPane().add(L1);
348             T1.setFont(new Font("宋体", Font.PLAIN, 20));
349             getContentPane().add(T1);
350             B1.setFont(new Font("宋体", Font.PLAIN, 20));
351             getContentPane().add(B1);
352             B2.setFont(new Font("宋体", Font.PLAIN, 20));
353             getContentPane().add(B2);
354             B1.addActionListener(new action());
355             B2.addActionListener(new action());
356         }
357         
358         public class action implements ActionListener
359         {
360 
361             public void actionPerformed(ActionEvent e)
362             {
363                 if(e.getSource()==B2)
364                 {
365                     setVisible(false);
366                 }
367                 
368                 if(e.getSource()==B1)
369                 {
370                     if(T1.getText().length()==0)
371                     {
372                         JOptionPane.showMessageDialog(f,"用户名不能为空");
373                     }
374                     else
375                     {
376                         username=T1.getText();
377                         L13.setText(username);
378                         
379                         File file=new File("用户名.txt");
380                         try{
381                         BufferedWriter writer=new BufferedWriter(new FileWriter(file.getName()));
382                             writer.write(username);;
383                         writer.close();
384                         } catch(IOException g)
385                         {
386                             System.out.print(g);
387                         }
388                         
389                         setVisible(false);
390                     }
391                     
392                 }
393                 
394             }
395             
396         }
397 
398     }
399     
400 }

核心类：

 1 package 四则运算;
 2 
 3 public class Core {
 4     int a;
 5     int b;
 6     int c;
 7     int d;
 8     public Core(int a,int b,int c,int d)
 9     {
10         this.a=a;
11         this.b=b;
12         this.c=c;
13         this.d=d;
14     }
15     public int calc()
16     {
17         if(c==0)
18         {
19             return a+b;
20         }
21         else if(c==1)
22         {
23             return a-b;
24         }
25         else if(c==2)
26         {
27             return a*b;
28         }
29         else if(c==3)
30         {
31             if(b==0)
32             {
33                 b++;
34             }
35             return a/b;
36         }
37         else
38         {
39             return jiecheng(d);
40         }
41     }
42     public String toString()
43     {
44         String A=new String();
45         String B=new String();
46         if(a<0)
47         {
48             A="("+a+")";
49         }
50         else
51         {
52             A=a+"";
53         }
54         if(b<0)
55         {
56             B="("+b+")";
57         }
58         else
59         {
60             B=b+"";
61         }
62         if(c==0)
63         {
64             return A+"+"+B;
65         }
66         else if(c==1)
67         {
68             return A+"-"+B;
69         }
70         else if(c==2)
71         {
72             return A+"*"+B;
73         }
74         else if(c==3)
75         {
76             return A+"/"+B;
77         }
78         else
79         {
80             return d+"!";
81         }
82     }
83 
84     public int jiecheng(int x)
85     {
86         if(x==0 || x==1)
87         {
88             return 1;
89         }
90         else
91         {
92             return x*jiecheng(x-1);
93         }
94     }
95 }

Junit测试用例：

 1 package 四则运算;
 2 
 3 import static org.junit.Assert.*;
 4 
 5 import org.junit.Test;
 6 
 7 public class CoreTest {
 8     Core test1=new Core(-75,15,0,10);
 9     Core test2=new Core(-75,15,1,10);
10     Core test3=new Core(-75,15,2,10);
11     Core test4=new Core(-75,15,3,10);
12     Core test5=new Core(-75,15,4,10);
13 
14     @Test
15     public void testCalc() {
16         System.out.println(test1.calc());
17         System.out.println(test2.calc());
18         System.out.println(test3.calc());
19         System.out.println(test4.calc());
20         System.out.println(test5.calc());
21     }
22 
23 }

测试运行截图：

0个错误，成功！

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原文地址：https://www.cnblogs.com/xujiahao/p/4488542.html

【作业报告】作业5 四则运算 测试与封装 5.1 改进版

【作业报告】作业5 四则运算测试与封装 5.1 改进版