Iterating A Map In Java

As of Java 8 we can use the forEach method as well as the iterator class to loop over a map. PhnMapget key. We know that MapentrySetreturns a set of key-value mappings contained in the map. Following are the types of Maps in Java.

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T he entrygetKey returns the key and entrygetValue returns the corresponding value.

Iterating A Map In Java. The Map comes in handy when we need to search update and remove items based on a key. Iterating through Java Map is very common tasks and we face this tasks daily basis. Iterating is very common process in any programming language using very basic for loop.

It returns the next element in the List. One object is listed as a key index to another object value. HmentrySet is used to retrieve all the key-value pairs called MapEntries and stores internally into a set.

We can also use the keySet method to fetch the keys from the map. In this tutorial we learned how to iterate a Map in Java. HashMap is a part of Javas collection providing the basic implementation of the Map interface of Java by storing the data in Key Value pairs to access them by an index of another type.

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