please???

Question about the task

We don't need repeats

Java Syntax, Level 8, Lesson 8

Under discussion

i gues i am emtying hole map what should i do ..

Create a Map<String, String> and add ten entries that represent (last name, first name) pairs.
Remove people with the same first name.

Requirements:

The program should not display text on the screen.
The program should not read values from the keyboard.
The createMap() method must create and return a HashMap that has (String, String) elements and contains 10 entries.
The removeFirstNameDuplicates() method must remove from the map all people who have the same first name.
The removeFirstNameDuplicates() method must call the removeItemFromMapByValue() method.

package com.codegym.task.task08.task0817; import java.util.HashMap; import java.util.Map; 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("bhoge", "kamdeo"); map.put("bhoit", "karan"); map.put("bhoite", "pramod"); map.put("raut", "abhi"); map.put("mange", "yogesh"); map.put("mesh", "chiran"); map.put("rrr", "rohit"); map.put("pandey", "vivek"); map.put("shir", "pranav"); map.put("bhoita", "karana"); return map; } public static void removeFirstNameDuplicates(Map<String, String> map) {for (Map.Entry<String, String> pair : map.entrySet()) { String value = pair.getValue(); removeItemFromMapByValue(map,value); } } 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) { } }

Comments (1)

Popular
New
Old

You must be signed in to leave a comment

Guadalupe Gagnon

Level 37 , Tampa, United States

11 November 2019, 15:55

#1 this code makes no check if the value is a duplicate of not. You need to add code in that checks if the value is in the map more than once before removing the value. #2 It is illegal to continue a for loop after removing an item from a collection. You will need to figure out a way to avoid this.