Completly lost... What should i do? Pls Help!

Question about the task

HashMap of Objects

Java Syntax, Level 8, Lesson 3

Resolved

I don´t know how to resolve this and i am completly lost. How could i improve my knowledge about HashMap?

There is a HashMap<String, Object>. 10 different object pairs have been added to it.
Display the contents of the collection, each element on a new line.

Example output: (here we just show one line):
Sim - 5

Requirements:

The program must create a HashMap variable with (String, Object) elements. The variable must be initialized immediately.
The program should not read values from the keyboard.
The program should add 10 different objects to the collection in accordance with the conditions.
The program should display the contents of the collection on the screen, each pair on a new line.

package com.codegym.task.task08.task0806; import java.util.HashMap; import java.util.Map; /* HashMap of Objects */ public class Solution { public static void main(String[] args) throws Exception { HashMap<String, Object> map = new HashMap<String, Object>(); map.put("Sim", 5); map.put("Tom", 5.5); map.put("Arbus", false); map.put("Baby", null); map.put("Cat", "Cat"); map.put("Eat", new Long(56)); map.put("Food", new Character('3')); map.put("Gevey", '6'); map.put("Hugs", 111111111111L); map.put("Comp", (double) 123); //write your code here for(HashMap.Entry<String, Object> pair : map.entrySet()){ String key = pair.getKey(); String value = pair.getValue(pair); System.out.println(pair.getkey() +" - " + pair.getvalue()); } } }

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Adrie Taniwidjaja

Level 11 , Bandung, Indonesia

10 July 2019, 09:14

Read this link https://codegym.cc/groups/posts/hashmap-java

Anonymous #10560641

Level 11

23 April 2020, 01:07

Whilst that was very helpful, I also think that there's a reason CodeGym emphasise that their tasks were built for IDEs. This is because you can use the in-built features of IntelliJ to help build your code* and that can actually be really useful for understanding the logic and giving constant reinforcement to a practical development skill. *by this I mean the formal, in-built function of debugging your code and the less formal solution, which is 'following the squiggly red lines'. :P

TrueJ

Level 11 , Kryvyy Rih, Ukraine

26 June 2019, 15:29

//write your code here for(Map.Entry<String, Object> pair : map.entrySet()) { System.out.println(pair.getKey() + " - " + pair.getValue()); }