Breaking News: Grepper is joining You.com. Read the official announcement!

hash map java

Add Answer

Magnificent Monkey Adi answered on October 13, 2021 Popularity 10/10 Helpfulness 2/10

answer hash map java

related Java Hash Map

related java hashmap

related Java HashMap

related hash map

hash map java

Comment

HashMap hm=new HashMap(int initialCapacity, float loadFactor);

Popularity 10/10 Helpfulness 2/10 Language java

Source: Grepper

Tags: hash java map

Link to this answer
Share Copy Link

Contributed on Oct 13 2021

Magnificent Monkey Adi

0 Answers Avg Quality 2/10

Closely Related Answers

Java Hash Map

Comment

// Java Hash Map
// -------------

import java.util.HashMap;

public class Hash_Map {
    public static void main(String[] args) {

        HashMap<String, String> countries = new HashMap<>();

        // Inserting values
        countries.put("Turkey", "Ankara");
        countries.put("USA", "Washington, D.C.");
        countries.put("Russia", "Moscow");
        countries.put("China", "Beijing");
        countries.put("India", "New Dehli");
        // Printing the entire HashMap
        System.out.println(countries);

        System.out.println();

        // Removing items in Hashmap
        countries.remove("India");
        // Printing the entire HashMap
        System.out.println(countries);

        System.out.println();

        // Finding and Printing specific item in Hashmap
        System.out.println(countries.get("Russia")); // this will print its value

        System.out.println();

        // Printing the Size of HashMap
        System.out.println("Size: " + countries.size());

        System.out.println();

        // Replacing Values in Hashmap
        countries.replace("USA", "Detroit");
        // Printing the entire HashMap after replacing value
        System.out.println(countries);

        System.out.println();

        // Checking for some key's existence in HashMap and Printing the result
        System.out.println(countries.containsKey("Pakistan"));

        System.out.println();

        // Checking for some value's existence in HashMap and Printing the result
        System.out.println(countries.containsValue("Beijing"));

        System.out.println();

        // Printing the entire Hasmap Line by Line
        for (String i : countries.keySet()) {
            System.out.print(i + "=");
            System.out.println(countries.get(i));
        }

        System.out.println();

        // Delete All values in HashMap And Printing To see Result
        countries.clear();
        System.out.println(countries);

    }
}

Popularity 10/10 Helpfulness 2/10 Language java

Source: Grepper

Tags: hash

Link to this answer
Share Copy Link

Contributed on Aug 16 2022

Wild Wolverine

0 Answers Avg Quality 2/10

java hashmap

Comment

// Java program to illustrate HashMap class of java.util
// package
  
// Importing HashMap class
import java.util.HashMap;
  
// Main class
public class GFG {
  
    // Main driver method
    public static void main(String[] args)
    {
        // Create an empty hash map by declaring object
        // of string and integer type
        HashMap<String, Integer> map = new HashMap<>();
  
        // Adding elements to the Map
        // using standard put() method
        map.put("vishal", 10);
        map.put("sachin", 30);
        map.put("vaibhav", 20);
  
        // Print size and content of the Map
        System.out.println("Size of map is:- "
                           + map.size());
  
        // Printing elements in object of Map
        System.out.println(map);
  
        // Checking if a key is present and if
        // present, print value by passing
        // random element
        if (map.containsKey("vishal")) {
  
            // Mapping
            Integer a = map.get("vishal");
  
            // Printing value for the corresponding key
            System.out.println("value for key"
                               + " \"vishal\" is:- " + a);
        }
    }
}

Popularity 10/10 Helpfulness 2/10 Language java

Source: www.geeksforgeeks.org

Tags: hashmap

Link to this answer
Share Copy Link

Contributed on Aug 08 2023

Crowded Copperhead

0 Answers Avg Quality 2/10

Java HashMap

Comment

import java.util.HashMap; // import the HashMap class

HashMap<String, String> capitalCities = new HashMap<String, String>();

Popularity 10/10 Helpfulness 2/10 Language java

Source: Grepper

Tags: hashmap

Link to this answer
Share Copy Link

Contributed on May 23 2022

naly moslih

0 Answers Avg Quality 2/10

hash map

Comment

int main() {
    
    unordered_map<int, int> hashmap;
    // 2. insert a new (key, value) pair
    hashmap.insert(make_pair(0, 0));
    hashmap.insert(make_pair(2, 3));
    // 3. insert a new (key, value) pair or update the value of existed key
    hashmap[1] = 1;
    hashmap[1] = 2;
    // 4. get the value of a specific key
    cout << "The value of key 1 is: " << hashmap[1] << endl;
    // 5. delete a key
    hashmap.erase(2);
    // 6. check if a key is in the hash map
    if (hashmap.count(2) <= 0) {
        cout << "Key 2 is not in the hash map." << endl;
    }
    // 7. get the size of the hash map
    cout << "the size of hash map is: " << hashmap.size() << endl; 
    // 8. iterate the hash map
    for (auto it = hashmap.begin(); it != hashmap.end(); ++it) {
        cout << "(" << it->first << "," << it->second << ") ";
    }
    cout << "are in the hash map." << endl;
    // 9. clear the hash map
    hashmap.clear();
    // 10. check if the hash map is empty
    if (hashmap.empty()) {
        cout << "hash map is empty now!" << endl;
    }
}

Popularity 10/10 Helpfulness 1/10 Language whatever

Source: Grepper

Tags: hash

Link to this answer
Share Copy Link

Contributed on Sep 07 2022

Good Gnat

0 Answers Avg Quality 2/10

hash map java

Contents

More Related Answers

hash map java

Closely Related Answers

Java Hash Map

java hashmap

Java HashMap

hash map

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.