Looping Map In Java

There are 6 different ways to extract or loop over map in java such as using enhanced for loop, iterator using entryset, java 8 and stream api. To loop or iterate any map implementation like hashmap or treemap in java, you need to know about three methods declared by map interface that play a role in iterating a. How to iterate map elements in java.

The hierarchy of java map is given below: This set of keys can be iterated using a java.util.iterator. This approach uses an anonymous function — also known as a lambda — and it’s similar to the approach used to traverse a map in scala.

Following are the most commonly used approaches to iterate any map in java.

Map and sortedmap, and three classes: This post discusses basic methods to loop over map in java. Stream api is one significant feature of java 8. Use foreach method to iterate through a map a map has two components, the key and the value.