Java 8 – Find First and Last entries in a Map or HashMap
In this article, we will discuss how to get First and Last entries from a Map or HashMap using Java 8 Streams API Find First Read More
Tag: collection framework
Java 8 – Find First and Last elements in a Set or HashSet
In this article, we will discuss how to get First and Last elements from a Set or HashSet using Java 8 Streams API Find First Read More
Java 8 – How to store multiple values for single key in HashMap ?
In this article, we will discuss how to store/put multiple values for single key in HashMap Sometimes, we might require to store multiple values for Read More
Java 8 – How to remove duplicates from ArrayList
In this article, we will discuss how to remove duplicate element/objects from ArrayList along with various examples 1. Stream distinct() method Stream’s distinct() method returns Read More
Java 8 – Stream forEach() method with examples
In this article, we will discuss forEach() method which is used to iterate through Collection, Map and Stream in detail with examples forEach() method is Read More
Java 8 – Difference between map() and flatMap() in Stream API
In this article, we will discuss difference between map() and flatMap() methods of Stream API introduced in Java 1.8 version Both these map methods of Read More
Java 8 – Introduction to Stream API
In this article, we will discuss Stream API – one of the new feature introduced in Java 1.8 version along with Functional Interface and Lambda Read More
Java – How to remove elements from LinkedList
In this article, we will discuss how to remove elements from LinkedList There are different methods available in LinkedList class for removing elements as listed Read More
How to check whether HashMap is empty or not ?
In this article, we will discuss and understand with a program to check whether HashMap is empty or not In earlier article, we have seen Read More
How to sort Vector using Collections.sort() in Java
In this article, we will list down steps to sort Vector Vector: Vector is implementation class of List interface (i.e.; Vector implements List) Vector uses resizable array or Read More
Sorting Collection of String, StringBuffer and StringBuilder in Java
In this article, we will discuss how to sort collection of, String StringBuffer StringBuilder In Collection framework hierarchy, below classes sorts value/objects stored by-default in Read More
Remove duplicate elements from ArrayList in Java
In this article, we will discuss how to remove duplicate elements from ArrayList in Java Already, we have discussed in one of the earlier article Read More
Java Collection Interview question and answers
In this article, we will cover some of the interview questions with their justification on Java Collection framework These are most frequently asked interview question Read More
Java – Sorting list of objects on multiple fields using Comparator
In previous articles, we have discussed how to sort list of objects on the basis of single field using Comparable and Comparator interfaces Read Java 8 Read More
Java – Ways to iterate over HashMap of ArrayList
In one of the previous articles, we already discussed different ways to iterate through Map but those are with String object only i.e.; both keys and values are Read More
CopyOnWriteArraySet v/s SynchronizedSet
In this article, we will discuss difference between CopyOnWriteArraySet and SynchronizedSet classes in detail i.e.; CopyOnWriteArraySet v/s SynchronizedSet Lets us move on and discuss key differences Read More
CopyOnWriteArraySet v/s HashSet
In this article, we will discuss difference between CopyOnWriteArraySet and HashSet classes in detail i.e.; CopyOnWriteArraySet v/s HashSet Lets us move on and discuss key differences Read More
CopyOnWriteArraySet class
In this article, we will discuss CopyOnWriteArraySet class – the implementation class for Set interface in detail This is the thread-safe version of Set and Read More
CopyOnWriteArrayList v/s SynchronizedList
In this article, we will discuss difference between CopyOnWriteArrayList and SynchronizedList classes in detail i.e.; CopyOnWriteArrayList v/s SynchronizedList Lets us move on and discuss key differences Read More
CopyOnWriteArrayList v/s ArrayList
In this article, we will discuss difference between CopyOnWriteArrayList and ArrayList classes in detail i.e.; CopyOnWriteArrayList v/s ArrayList Lets us move on and discuss key differences Read More