![]() ![]() In the example code HashMap is used to demonstrate traversal of a Map. HashMap iteration using for-each and iterator Java example Overview In this article, we'll see how to use HashMap in Java, and we'll look at how it works internally. Java 8 onwards you can also use forEach statement. A Guide to Java HashMap Last updated: JWritten by: Michael Krimgen Java + Java Map reference Get started with Spring 5 and Spring Boot 2, through the Learn Spring course: > CHECK OUT THE COURSE 1.You can use either an iterator or a For-Each loop to iterate through a Map.The iterator will run through each element in. Now, when you know about these three methods let's see how these methods can be used to loop through a HashMap in Java. In this Example of looping over HashMap in Java we have used Java Iterator instead of for loop, rest are similar to earlier example of looping. You can use the HashMap keys, HashMap values, and HashMap Entry Object to iterate over the HashMap in Java. Collection values()- This method returns a Collection view of the values contained in this map.Set keySet()- This method returns a set that contains the keys of the map.The entries in the set are actually object of type Map.Entry. ![]() Set> entrySet()- This method returns a set that contains the entries in the map. How to Iterate Through a Map in Java Method 1: Iterating Over Map.entrySet() Using a For-Each Loop Method 2: Iterating Over Keys/Values Using keySet() and.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 Map.
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