您当前的位置： 首页 > 学无止境 > 心得笔记 网站首页心得笔记

〖第12章：JAVA IO〗_实例操作：投票程序

发布时间：2020-12-31 18:39:52编辑：雪饮阅读（）

 利用比较器及io的输入流实现一个投票程序

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.InputStream;
class Person implements Comparable<Person>{
       private String name;
       private int vote=0;
       public Person(String name){
              this.name=name;
       }
       public int compareTo(Person o){
              if(this.vote<o.vote){
                     return 1 ;
              }else if(this.vote>o.vote){
                     return -1 ;
              }else{
                     return 0 ;
              }
       }
       public void voteAdd(){
              this.vote=this.vote+1;
       }
       public int getVote(){
              return this.vote;
       }
       public String getName(){
              return this.name;
       }
}
class Vote{
       private boolean selectEnd=false;
       private Person persons[]={new Person("kasumi"),new Person("ayane"),new Person("snowDrink"),new Person("momiji")};
       public Vote(){
              System.out.println("----------雾幻天神流天神门第十八代目投票选举----------");
              for(int i=0;i<this.persons.length;i++){
                     System.out.println("["+i+"]"+this.persons[i].getName());
              }
              while(!this.selectEnd){
                     this.vote();
              }
              this.getResult();
       }
       public int maxVoteNum(){
              java.util.Arrays.sort(this.persons) ;
              int count=0;
              for(Person x:this.persons){
                     if(x.getVote()==this.persons[0].getVote()){
                            count++;
                     }
              }
              return count;
       }
       private void getResult(){
              java.util.Arrays.sort(this.persons);
              System.out.println("--------------------投票结果排行榜--------------------");
              for(Person x:this.persons){
                     System.out.println("姓名:"+x.getName()+",票数:"+x.getVote());
              }
              System.out.println("投票最终结果：" + this.persons[0].getName()+"，最后以"+this.persons[0].getVote()+"票当选掌门人！") ;
       }
       public void vote(){
              InputData input = new InputData();
              int length=this.persons.length;
              try{
                     int num = input.getInt("请输入侯选掌门人代号（数字"+length+"结束）：","此选票无效，请输入正确的侯选人代号！") ;
                     if(num==length){
                            if(this.maxVoteNum()>1){
                                          System.out.println("最大票数出现"+this.maxVoteNum()+"人,请继续投票");
                                   }
                            else{
                                   this.selectEnd = true ;  
                            }
                     }
                     else{
                            if(num>length || num<0){
                                   System.out.println("此选票无效，请输入正确的侯选人代号！");  
                            }
                            else{
                                   this.persons[num].voteAdd() ;
                            }
                     }
              }
              catch(NullPointerException e){
                     System.out.println("程序退出");
                     System.exit(0);
              }
       }
}
class InputData{
       private BufferedReader buf = null ;
       public InputData(){
              this.buf = new BufferedReader(new InputStreamReader(System.in)) ;
       }
       public String getString(String info){
              String temp = null ;
              System.out.print(info) ;
              try{
                     temp = this.buf.readLine() ;
              }catch(IOException e){
                     e.printStackTrace() ;
              }
              return temp ;
       }
       public int getInt(String info,String err){
              int temp = 0 ;
              String str = null ;
              boolean flag = true ;
              while(flag){
                     str = this.getString(info) ;
                     if(str.matches("\\d+")){
                            temp = Integer.parseInt(str) ;
                            flag = false ;
                     }else{
                            System.out.println(err) ;
                     }
              }
              return temp ;
       }
};
public class Hello{
   public static void main(String args[]){
              new Vote();
   }
};