for (Map.Entry<String, String> entry : yourHashMap.entrySet()) {
System.out.println(entry.getKey() + " = " + entry.getValue());
}
for(Map.Entry<String, Integer> entry : hashMap.entrySet()) {
String key = entry.getKey();
Integer value = entry.getValue();
//do something with the key and value
}
// 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());
}
}
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(", ");
}
}
}
for (Map.Entry<Integer, Integer> entry : hm.entrySet()) {
int a=entry.getKey();
int b=entry.getValue();
}
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);
}