Java实例---简单的投票系统

 1 package vote;
 2 
 3 import java.io.BufferedReader;
 4 import java.io.IOException;
 5 import java.io.InputStreamReader;
 6 
 7 public class InputData {
 8     
 9     private BufferedReader buf ;
10     
11     public InputData()
12     {
13         this.buf = new BufferedReader(new InputStreamReader(System.in));
14     }
15     
16     public String getString(String info)
17     {
18         String str = null;
19         System.out.println(info);
20         try {
21             str = this.buf.readLine();
22         } catch (IOException e) {
23             // TODO 自动生成的 catch 块
24             e.printStackTrace();
25         }
26         return str;
27         
28     }
29     
30     public int getInt(String info,String error)
31     {
32         int temp = 0;
33         String str = null;
34         str = this.getString(info);
35         if(str.matches("\\d+")){
36             temp = Integer.parseInt(str);
37         }else{
38             System.out.println(error);
39         }
40                 
41         return temp;
42     }
43     
44     
45 }

 1 package vote;
 2 
 3 public class Person implements Comparable<Person>{
 4     private String name;
 5     private int stu_Id;
 6     
 7     public Person(String name, int stu_Id, int voteNum) {
 8         super();
 9         this.name = name;
10         this.stu_Id = stu_Id;
11         this.voteNum = voteNum;
12     }
13     
14     public String getName() {
15         return name;
16     }
17     public void setName(String name) {
18         this.name = name;
19     }
20     public int getStu_Id() {
21         return stu_Id;
22     }
23     public void setStu_Id(int stu_Id) {
24         this.stu_Id = stu_Id;
25     }
26     public int getVoteNum() {
27         return voteNum;
28     }
29     public void setVoteNum(int voteNum) {
30         this.voteNum = voteNum;
31     }
32     private int  voteNum;
33 
34     @Override
35     public int compareTo(Person o) {
36         // TODO 自动生成的方法存根
37         if(this.getVoteNum() > o.getVoteNum())
38         {
39             return -1;
40         }else if(this.getVoteNum() < o.getVoteNum())
41         {
42             return 1;
43         }else
44         {
45             return 0;
46         }
47     }
48 }

  1 package vote;
  2 
  3 import java.io.File;
  4 import java.util.Arrays;
  5 
  6 public class VoteOperate {
  7     private Person[] per = {new Person("小米",001,0),new Person("大米",002,0), new Person("玉米",003,0),
  8         new Person("稀饭",004,0),new Person("刘能",005,0),new Person("逼",006,0)};
  9     
 10     private InputData input ;
 11     private boolean flag = true;
 12     private int sum;
 13     private int errorVote;
 14     
 15     public VoteOperate()
 16     {
 17         this.input =  new InputData();
 18         while(flag)
 19         {
 20             ++sum;
 21             this.voteForCandidate();
 22         }
 23         this.printInfo();
 24         this.getResulet();
 25     }
 26     
 27     public void voteForCandidate()
 28     {
 29         int temp = 0;
 30         temp = input.getInt("请输入候选人编号(0表示投票结束)", "投票只能是数字，范围0-" + per.length);
 31         switch (temp) {
 32         case 1:
 33         {
 34             this.per[0].setVoteNum(this.per[0].getVoteNum() + 1);
 35             break;
 36         }
 37         
 38         case 2:
 39         {
 40             this.per[1].setVoteNum(this.per[1].getVoteNum() + 1);
 41             break;
 42         }
 43 
 44         case 3:
 45         {
 46             this.per[2].setVoteNum(this.per[2].getVoteNum() + 1);
 47             break;
 48         }
 49 
 50         case 4:
 51         {
 52             this.per[3].setVoteNum(this.per[3].getVoteNum() + 1);
 53             break;
 54         }
 55 
 56         case 5:
 57         {
 58             this.per[4].setVoteNum(this.per[4].getVoteNum() + 1);
 59             break;
 60         }
 61         case 6:
 62         {
 63             this.per[5].setVoteNum(this.per[5].getVoteNum() + 1);
 64             break;
 65         }
 66         case 0:
 67         {
 68             System.out.println("退出系统");
 69             this.flag = false;
 70             break;
 71         }
 72         default:{
 73             System.out.println("请重新输入一个数字：");
 74             this.errorVote++;
 75         }
 76         }
 77     }
 78     
 79     //打印候选人信息：
 80         public void printInfo(){    
 81             for(int i=0;i<per.length;i++){
 82                 System.out.println(this.per[i].getStu_Id() + "："
 83                     + this.per[i].getName() + "【"+this.per[i].getVoteNum()+"】") ;    
 84             }
 85         }
 86         
 87     //获取结果    
 88     public void getResulet(){
 89         Arrays.sort(per);
 90         if ((sum - 1 )==0)
 91         {
 92             System.out.println("投票故障...");
 93         }
 94         else 
 95         {
 96             System.out.println("投票最终结果：" + "\n共投出：" + ( this.sum  - 1 )+ "票,其中，错误投票 : " + this.errorVote + "票，有效票" + ( this.sum  - 1 - this.errorVote) + "\n" 
 97            + this.per[0].getName()+"同学，最后以"+this.per[0].getVoteNum()+"票当选班长！") ;
 98         }
 99     };
100     
101 }

1 package vote;
2     
3 public class Test {
4     public static void main(String[] args) {
5         new VoteOperate();
6     }
7 }