#Java for loop hashmap how to
#Java for loop hashmap software

Method Map.keySet() is used to return a Set view of the keys contained in the Map.Īlso, the Map.values() method is used to return the collection-view of the values contained in the Map. Method 2: Iterating Over Keys/Values Using keySet() and values() Methods Key = Java: Value = ProgrammingLanguage Key = IK: Value = InterviewKickstart Key = SE: Value = SoftwareEngineer ('Key = ' + itr.getKey() + ': Value = ' + itr.getValue()) Using for-each loop for iteration over Map.entrySet() MyMap.put('Java', 'ProgrammingLanguage') This method can be used when we need both keys and values in the loop. Thus, we can easily iterate over the key-value pairs of our Map by using methods of Map.Entry like getKey() and getValue(). We can use the Map.entrySet() method to return a collection-view(Set>) of the mapping contained in the given Map. Method 1: Iterating Over Map.entrySet() Using a For-Each Loop In this article, we will discuss five methods. We have to employ other methods to iterate through a Map. As Maps are not a collection, we cannot iterate on them using iterators. We can iterate on collections using iterators. In Java, a group of objects that can be represented as a single unit is a collection of objects. An iterator is an interface that is used to iterate through the collection. Thus, a Map is an interface that extends the collection interface. The Map is not a collection, but it is still considered part of the collection. The Map comes in handy when we need to search, update, and remove items based on a key. The Map in Java contains elements based on key-value pairs, i.e., a unique key is assigned to each value.

#Java for loop hashmap how to

How to iterate through a Map in Java: 5 Methods.

In this article, we will look at one such feature - the map.

#Java for loop hashmap software

Software engineers or developers often prefer object-oriented programming languages, like Java, for the features and ease they offer. If you are preparing for a coding interview, and Java is your programming language of choice, you will benefit from reviewing some of the basics of Java.