finally,Map values : {lao5=zhang, lao3=biao}
package com.codegym.task.task08.task0817;
import java.util.HashMap;
import java.util.*;
/*
We don't need repeats
*/
public class Solution {
public static HashMap<String, String> createMap() {
HashMap<String,String> map = new HashMap<String,String>();
map.put("xiao","ming");
map.put("xiao1","wang");
map.put("xiao2","zheng");
map.put("xiao3","li");
map.put("lao","wang");
map.put("lao1","zheng");
map.put("lao2","li");
map.put("lao3","biao");
map.put("lao4","ming");
map.put("lao5","zhang");
return map;
//write your code here
}
public static void removeFirstNameDuplicates(Map<String, String> map) {
HashMap<String,String> copy = new HashMap<String,String>(map);
Iterator<Map.Entry<String,String>> iterator = copy.entrySet().iterator();
int count =0;
while(iterator.hasNext()){
String name1 = iterator.next().getValue();
System.out.print("one "+name1+" ");
Iterator<Map.Entry<String,String>> iterator2 = copy.entrySet().iterator();
while(iterator2.hasNext()){
String name2= iterator2.next().getValue();
System.out.print(name2+"");
if(name1.equals(name2)){
count++;}
if(count>1){
System.out.println("Value found: removing: " + name1);
removeItemFromMapByValue(map,name2);
System.out.println(name2);
count=0;
System.out.println("Map values now: " + map);
break;
}
}
}
}
//write your code here
public static void removeItemFromMapByValue(Map<String, String> map, String value) {
HashMap<String, String> copy = new HashMap<String, String>(map);
for (Map.Entry<String, String> pair : copy.entrySet()) {
if (pair.getValue().equals(value))
map.remove(pair.getKey());
}
}
public static void main(String[] args) {
Map<String,String> map=createMap();
//System.out.println(map);
removeFirstNameDuplicates(map);
// System.out.println(map);
}
}