0926-----homework（1）

 

 

/**
  *homework0926
  *@author:kai li
  */
package com.kai.li.homework0926;
import java.util.List;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
/**
  *
  */
public class HomeWork0926{
    public static void main(String[] args)throws Exception{
        
        /**
          *question one
          */

        /*create data sourse*/

        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");
        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");
        Map<String,String> footballMap=new HashMap<>();
        for(int i=0;i<keyList.size();i++){
            footballMap.put(keyList.get(i),valueList.get(i));
        }

        /*query with years*/
         
        System.out.print("请输入年份：");    
        Scanner scanner=new Scanner(System.in);
        String strKey=scanner.nextLine();
        if(!footballMap.containsKey(strKey))
            System.out.println("没有举办世界杯");
        else
            System.out.println("世界杯冠军是： "+footballMap.get(strKey));

        /*query with countrys */
        
        System.out.print("请输入国家名称：");
        String strValue=scanner.nextLine();
        if(!footballMap.containsValue(strValue))
            System.out.println(strValue+"没有得过世界杯的冠军");
        else{
            System.out.println(strValue+"得冠军年份是：");
            footballMap.keySet().stream().filter(i->strValue.equals(footballMap.get(i))).sorted().forEach(System.out::println);    //filter the data then sorted then println
        }
    }
}

}