Iterator in Java
In the previous post, we have learnt about TreeMap in java. In this post, we will learn about the Iterator in java. Iterator is used for iterating(looping) over collections classes in java like HashMap,...
Tagged: Collections Framework
TreeMap in Java
In the previous post, we have learnt about LinkedHashMap. In this post, we will learn about TreeMap in java. It has the following features as given below. It implements the NavigableMap interface and extends...
LinkedHashMap in java
In the previous post, we have seen how to remove elements from HashMap. In this post, we will learn about LinkedHashMap in java. LinekdHashMap has the following features. It implements Map and extends HashMap....
Remove key and value pair from HashMap
In the previous post, we have seen how to sort the HashMap on the basis of keys and values. In this post we will see how to remove key and value pair from HashMap....
Sort HashMap by keys and values
In the previous post, we have learnt how to iterate over the HashMap. In this post, we will see how to sort HashMap by keys and values. By default, HashMap does not preserve any...
Iterate over a HashMap
In this post, we have seen how to add the element to HashMap. In this post, we will see how to iterate over a HashMap. We can iterate over a HashMap by using two ways....
Add elements to HashMap
In this post, we have seen about HashMap. In this post, we will learn how to add elements to HashMap. We need to use method put to add the values to HashMap. Syntax: HashMap<key,...
TreeSet in Java
In the previous post, we have learnt about LinkedHashSet. In this post, we will learn about TreeSet in java. TreeSet has the following features. Contains unique elements like HashSet. The TreeSet class implements NavigableSet...
LinkedHashSet in java
In the previous post, we have learnt about HashSet in java. In this post, we will see about the LinkedHashSet in java. It also implements Set interface like HashSet but it maintains insertion order. It...
HashSet in java
In this previous post, we have seen how to Iterate over a Vector. In this post, we will learn about HashSet in java. HashSet has the following features. HashSet implements Set interface. It does not...