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

map java

Add Answer

Innocent Iguana answered on January 6, 2021 Popularity 10/10 Helpfulness 4/10

answer map java

related map java

related map in java

related Java How to use Map?

map java

Comment

import java.util.HashMap;
import java.util.Map;

public class MapForEachExample {
    public static void main(String[] args) {
        // Creating a Map
        Map<String, Integer> populationMap = new HashMap<>();
        populationMap.put("New York", 8419600);
        populationMap.put("Los Angeles", 3990456);
        populationMap.put("Chicago", 2716000);
        populationMap.put("Houston", 2328074);
        populationMap.put("Phoenix", 1680992);

        // Using forEach with Map.Entry
        populationMap.forEach((key, value) -> System.out.println("Key: " + key + ", Value: " + value));
        // Alternative : for-each with Entry and entrySet()
        for (Map.Entry<String, Integer> entry : populationMap.entrySet()) {
            System.out.println("Key: " + entry.getKey() + ", Value: " + entry.getValue());
        }

        //Using forEach with method reference
        System.out.println("\nUsing forEach with method reference:");
        populationMap.forEach(MapForEachExample::printEntry);
        // Alternative : normal for-each loop
        Set<String> mapKeys = populationMap.keySet(); // contains all keys of the map
        List<Integer> mapValues = populationMap.values(); // contains all values of the map
        for (Integer key : mapKeys) {
            System.out.println("Value: " + value);
        }
        for (Integer value : mapValues) {
            System.out.println("Value: " + value);
        }

    }

    private static void printEntry(String key, Integer value) {
        System.out.println("Key: " + key + ", Value: " + value);
    }
}

Popularity 10/10 Helpfulness 4/10 Language java

Source: Grepper

Tags: java map

Link to this answer
Share Copy Link

Contributed on Jan 01 2024

Innocent Iguana

0 Answers Avg Quality 2/10

Closely Related Answers

map java

Comment

Map<Integer,String> map=new HashMap<>();
map.put(1,"john");
map.put(2,"kale");
for(Map.Entry<Integer,String> x:map.entrySet()){
System.out.println(x.getKey());
System.out.println(x.getValue());
}

Popularity 10/10 Helpfulness 4/10 Language java

Source: Grepper

Tags: java

Link to this answer
Share Copy Link

Contributed on May 15 2022

La Van Tho

0 Answers Avg Quality 2/10

map in java

Comment

MAP : is a (key-value format) 
      and keys are always unique, 
      and value can be duplicated. 
- HashTable don't have null key, sychronized(thread-safe)
- LinkedHashMap can have null key, keeps order
- HasHMap can have null key, order is not guaranteed
- TreeMap doesn't have null key and keys are sorted

Popularity 10/10 Helpfulness 3/10 Language java

Source: Grepper

Tags: java

Link to this answer
Share Copy Link

Contributed on Jan 06 2021

Obedient Ocelot

0 Answers Avg Quality 2/10

Java How to use Map?

Comment

// Map implementation using HashMap
Map<Key, Value> numbers = new HashMap<>();

Popularity 10/10 Helpfulness 3/10 Language java

Source: Grepper

Tags: java

Link to this answer
Share Copy Link

Contributed on May 25 2022

SAMER SAEID

0 Answers Avg Quality 2/10

map java

Contents

More Related Answers

map java

Closely Related Answers

map java

map in java

Java How to use Map?

Grepper

Documentation

Social

Legal

Contact

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