java 提取内容并排序

从文件中读取所有信息提取人的姓名，并把打印出重复人的次数和排列从小到大排列

 

使用 java Io 操作和集合类，排序。以map 作为集合类，速度快

 

 

package lianxi;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.TreeSet;

public class Phone {
 /**
  * 1,张三，30
  * 2,王五，40
  * 
  * */
 public static Map result=new HashMap();  //使用map 主要是使用散列表，排序很快的，但是它不是线程安全
 
 public static void main(String[]args){
  
  String[] userTemp=new String[]{
                           "1,张三,30",
                           "2,王五,40",
                           "3,王五,40",
                           "4,张三,30",
                           "5,王五11,40",
                           "6,王五11,40",
                           "7,王五,40",
                           "8,张三,30",
                           "15,李四,30",
                           "9,王五11,40",
                           "10,王五11,40",
                           "11,王五,40",
                           "12,张三,30",
                           "13,王五11,40",
                           "14,王五11,40"  
                   };
  
  
  for(int i=0;i<userTemp.length;i++){   
   talkPeopleInf(userTemp[i]);   
  }
  
      Iterator  keyIterator=result.keySet().iterator();