"error: cannot find symbol HashMap"

Question

Trying to create (or rather learn) a HashMap in below fashion :

public class Demo{

     public static void main(String args[]){
        System.out.println("============Starting Hashmap============");


        //hashmap portion
        HashMap<String, Integer> myMap = new HashMap<String, Integer>();

        System.out.println("============Ending Hashmap============");
     }
}

I am using an online complier and have searched a lot, i found that my way of declaration is correct but something else is popping up the error
Below is the error

Demo.java:8: error: cannot find symbol
                HashMap<String, Integer> myMap = new HashMap<String, Integer>();
                ^
   symbol:   class HashMap
   location: class Demo

   Demo.java:8: error: cannot find symbol
                HashMap<String, Integer> myMap = new HashMap<String, Integer>();
                                                     ^
      symbol:   class HashMap
      location: class Demo

2 errors

What i need help in : m just trying to get the basic of creating a hashmap and inserting some key and value in it, but above error stopped me in very first step.....any help in solving this is appreciated!! :)

http://docs.oracle.com/javase/tutorial/java/package/usepkgs.html — JB Nizet, Feb 12 '14 at 07:05

score 28 · Accepted Answer · answered Feb 12 '14 at 07:03

You need to import the HashMap into the class

import java.util.HashMap;

public class Demo{

      public static void main(String args[]){
        System.out.println("============Starting Hashmap============");


        //hashmap portion
        HashMap<String, Integer> myMap = new HashMap<String, Integer>();

        System.out.println("============Ending Hashmap============");
     }
}

score 2 · Answer 2 · answered Feb 12 '14 at 07:04

2

you need to import the HashMap to avoid the compile error

import java.util.HashMap;

answered Feb 12 '14 at 07:04

Nambi

11,766
3
35
49

score 1 · Answer 3 · answered Sep 01 '20 at 13:50

1

java.util.HashMap<Character, Integer> map = new java.util.HashMap<>();

Use this if you can't import java.util.HashMap;

answered Sep 01 '20 at 13:50

Jayasurya

19
1
3

1

99.98% of the time, this is the wrong thing to do. – Stephen C Sep 01 '20 at 13:55

"error: cannot find symbol HashMap"

3 Answers3