0926-----homework（1）

 1 /**
 2   *homework0926
 3   *@author:kai li
 4   */
 5 package com.kai.li.homework0926;
 6 import java.util.List;
 7 import java.util.ArrayList;
 8 import java.util.Arrays;
 9 import java.util.HashMap;
10 import java.util.Map;
11 import java.util.Scanner;
12 /**
13   *
14   */
15 public class HomeWork0926{
16     public static void main(String[] args)throws Exception{
17         
18         /**
19           *question one
20           */
21 
22         /*create data sourse*/
23 
24         List<String> keyList=Arrays.asList("1930","1934","1938","1950","1954","1958","1962","1966","1970","1974","1978","1982","1986","1990","1994","1998","2002","2006","2010","2014");
25         List<String> valueList=Arrays.asList("乌拉圭","意大利","意大利","乌拉圭","西德","巴西","巴西","英格兰","巴西","西德","阿根廷","意大利","阿根廷","西德","巴西","法国","巴西","意大利","西班牙","德国");
26         Map<String,String> footballMap=new HashMap<>();
27         for(int i=0;i<keyList.size();i++){
28             footballMap.put(keyList.get(i),valueList.get(i));
29         }
30 
31         /*query with years*/
32          
33         System.out.print("请输入年份：");    
34         Scanner scanner=new Scanner(System.in);
35         String strKey=scanner.nextLine();
36         if(!footballMap.containsKey(strKey))
37             System.out.println("没有举办世界杯");
38         else
39             System.out.println("世界杯冠军是： "+footballMap.get(strKey));
40 
41         /*query with countrys */
42         
43         System.out.print("请输入国家名称：");
44         String strValue=scanner.nextLine();
45         if(!footballMap.containsValue(strValue))
46             System.out.println(strValue+"没有得过世界杯的冠军");
47         else{
48             System.out.println(strValue+"得冠军年份是：");
49             footballMap.keySet().stream().filter(i->strValue.equals(footballMap.get(i))).sorted().forEach(System.out::println);    //filter the data then sorted then println
50         }
51     }
52 }

88 }