Java实例---简单的投票系统
代码分析
InputData.java
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 }
View Code
Person.java
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 }
View Code
VoteOperate.java
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 }
View Code
Test.java
1 package vote;
2
3 public class Test {
4 public static void main(String[] args) {
5 new VoteOperate();
6 }
7 }
View Code
效果截图
源码下载
作者：小a玖拾柒
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