![]() ![]() 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. How to iterate through a Map in Java: 5 Methods.In this article, we will look at one such feature - the map. 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. ![]()
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