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Let’s take an example program based on the forEach() method. Id: 1404, Name: Mark Iterating Java HashMap using forEach() method ("Id: " + entry.getKey() + ", Name: " + entry.getValue()) Iterating over entries of a map using entrySet() method. We will use the following methods for iteration. Let’s take an example program where we will iterate entry of a hash map using Map.Entry method. Iterating Java HashMap using Map.Entrymethod

Iterating over values of a hashmap using values() method. Iterating over keys of a hashmap using keySet() method. KeySet() method returns a set view of the keys from a hash map and values() method returns a collection-view of values from a hash map. Let’s take an example program where we will iterate over keys or values of a hash map using keySet() and values() methods. Using keySet(), values(), and for-each loop, you can iterate over keys or values of a hash map. This technique is useful when you want to get a set view of keys or values of a hash map. Iterating over keys or values using keySet() and value() methods

("Entries of HashMap after removing: " +hmap.entrySet()) Įntries of HashMap after removing: Itr.remove() // This method will remove the last entry of a hash map while iterating. Removing the last entry returned by Iterator Here, entrySet is a method that is used to get a view of entries of a map. Let’s take another example where we will remove the last entry of a hash map returned by the Iterator. Iterator itr3 = hmap.values().iterator() values is a method that is used to get values of keys of a hash map. Iterator itr2 = hmap.keySet().iterator() keySet is a method that is used to get view of keys of a hash map. Iterator> itr = hmap.entrySet().iterator() entrySet is a method that is used to get view of entries of a hash map. Creating an Iterator object using iterator() method. HashMap hmap = new HashMap() // Creating a hash map. Let’s take an example program where we will iterate hash map in java using java iterator concept. Let’s understand all the important ways to iterate HashMap in Java.