JAVA

java iterate through hashmap

for (Map.Entry<String, String> entry : yourHashMap.entrySet()) {
	System.out.println(entry.getKey() + " = " + entry.getValue());
}

how to iterate hashmap in java

for (Map.Entry<String, String> entry : yourHashMap.entrySet()) {
	System.out.println(entry.getKey() + " = " + entry.getValue());
}

map.forEach((k, v) -> {
    System.out.format("key: %s, value: %d%n", k, v);
});

loop through keys only in hashmap java

Map<String, Object> map = ...;

for (String key : map.keySet()) {
    // ...
}

how to iterate hashmap java

Map<Integer, Integer> map = new HashMap<Integer, Integer>();
for (Map.Entry<Integer, Integer> entry : map.entrySet()) {
    System.out.println("Key = " + entry.getKey() + ", Value = " + entry.getValue());
}

iterating over a hashmap

for(Map.Entry<String, Integer> entry : hashMap.entrySet()) {
    String key = entry.getKey();
    Integer value =  entry.getValue();
    //do something with the key and value
}

Hashmap iteration

// Java program to demonstrate iteration over
// Map.entrySet() entries using for-each loop
 
import java.util.Map;
import java.util.HashMap;
 
class IterationDemo
{
    public static void main(String[] arg)
    {
        Map<String,String> gfg = new HashMap<String,String>();
     
        // enter name/url pair
        gfg.put("GFG", "geeksforgeeks.org");
        gfg.put("Practice", "practice.geeksforgeeks.org");
        gfg.put("Code", "code.geeksforgeeks.org");
        gfg.put("Quiz", "quiz.geeksforgeeks.org");
         
        // using for-each loop for iteration over Map.entrySet()
        for (Map.Entry<String,String> entry : gfg.entrySet())
            System.out.println("Key = " + entry.getKey() +
                             ", Value = " + entry.getValue());
    }
}

How to iterate hashmap entries in java

// Creating a HashMap
Map<String, String> langTable = new HashMap<String, String>();
 
// Inserting elements to HashMap
langTable.put("A", "Angular");
langTable.put("J", "Java");
langTable.put("P", "Python");
langTable.put("H", "Hibernate");
 
// Iterating HashMap using foreach
for (Map.Entry<String, String> set : langTable.entrySet()) {
	// Printing all elements of a Map
	System.out.println(set.getKey() + " = " + set.getValue());
}

iterate through hashMap by forEach loop

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

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

    // create a HashMap
    HashMap<Integer, String> languages = new HashMap<>();
    languages.put(1, "Java");
    languages.put(2, "Python");
    languages.put(3, "JavaScript");
    System.out.println("HashMap: " + languages);

    // iterate through keys only
    System.out.print("Keys: ");
    for (Integer key : languages.keySet()) {
      System.out.print(key);
      System.out.print(", ");
    }

    // iterate through values only
    System.out.print("
Values: ");
    for (String value : languages.values()) {
      System.out.print(value);
      System.out.print(", ");
    }
    
    // iterate through key/value entries
    System.out.print("
Entries: ");
    for (Entry<Integer, String> entry : languages.entrySet()) {
      System.out.print(entry);
      System.out.print(", ");
    }
  }
}

foreach loop java values hashmap

for (V valuesName : arbitraryHashMap.values()) {
	//Do Stuff with valuesName
}

java iterate hashmap

public static void printMap(Map mp) {
    Iterator it = mp.entrySet().iterator();
    while (it.hasNext()) {
        Map.Entry pair = (Map.Entry)it.next();
        System.out.println(pair.getKey() + " = " + pair.getValue());
        it.remove(); // avoids a ConcurrentModificationException
    }
}

iterate hashmap entries

Map<Character, String> charType
            = new HashMap<Character, String>();
 
        // Inserting data in the hash map.
        charType.put('J', "Java");
        charType.put('H', "Hibernate");
        charType.put('P', "Python");
        charType.put('A', "Angular");
 
        // Iterating HashMap through forEach and
        // Printing all. elements in a Map
        charType.forEach(
            (key, value)
                -> System.out.println(key + " = " + value));
		
		// or 
		// using for loop to iterate the map entry sets
		for (Map.Entry<String,String> mapElement : charType.entrySet()) {
            String key = mapElement.getKey();
 
            // Adding some bonus marks to all the students
            String value = mapElement.getValue();
 
            // Printing above marks corresponding to
            // students names
            System.out.println(key + " : " + value);
        }