HashMap Iterator
Iterator returned by entrySet() and keySet() methods can be used to iterate a HashMap in Java Let us look at the code for the iterator using both entrySet() and keySet() methods: Output
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Iterator returned by entrySet() and keySet() methods can be used to iterate a HashMap in Java Let us look at the code for the iterator using both entrySet() and keySet() methods: Output
HashMap is a popular class of Collections framework which is used to store key value pair. There are 2 ways to iterate over the hashmap and access its keys and values. Let us look at these ways: Using entrySet() method entrySet() method returns a Set of Map.Entry<K,V> type, where K is key and V is … Read more
ArrayList is one of the most used Collections in java. It is a dynamic array which means its size can increase automatically as more elements are added to it. Let us see how to create an arraylist: ArrayList<Integer> arrList = new ArrayList<Integer>(); We need to give the object type within angle brackets which tells the … Read more