Java 8 – Optional class in detail
In this article, we will discuss Optional class in detail and understand why it is needed/introduced in Java 1.8 version and how to avoid/handle (or Read More
Tag: Java
Java 8 – How to Reverse a String in place ?
In this article, we will see how to reverse a String in place using traditional & Java 8 Stream approaches 1. Traditional approach : ReverseStringInPlace.java Read More
Java 8 – How to find common & uncommon elements from 2 Lists ?
In this article, we will discuss how to find and print common & uncommon elements from 2 Lists (or ArrayList) There are different ways to Read More
Java 8 – How to sort HashMap by its Values first and then by its Keys ?
In this article, we will discuss how to sort a HashMap by its Values first and then by its Keys 1. Sorting HashMap by Value Read More
Java Interview – How to create Thread-safe Singleton class ?
In this article, we will discuss how to write Java code to create Thread-safe Singleton class in a Multi-threaded environment Before starting to write code Read More
Java 8 – Find duplicate count from Integer arrays ?
In this article, we will discuss how to find the desired result from the Integer[] arrays for the problem statement given below 1. Problem statement Read More
Java 8 – Find employee count in each department ?
In this article, we will discuss how to find employee count in every department using Java 8 Stream API Find employee count in each department Read More
Java – How to check if a String is an Integer ?
In this article, we will discuss how to check if a String is an Integer or not using different String literals Check String is an Read More
Java – Difference between start() and run() methods of Thread
In this article, we will discuss 2 important methods of Thread class – start() & run() 1. Thread methods : There are several methods in Read More
Java – Important methods and constructors of a Thread class
In this article, we will discuss important methods and constructors of a Thread class 1. Thread : 1.1 Creating a Thread : There are 2 Read More
Java – Thread class v/s Runnable interface
In this article, we will discuss difference between extending a Thread class and implementing a Runnable interface for creating a new Thread 1. Thread class Read More
Java – Different ways to create/spawn a Thread
In this article, we will discuss different ways to create or spawn a Thread in Java 1. Creating a Thread : There are 2 ways Read More
Java – Introduction to Thread
In this article, we will discuss the concepts of Thread in Java 1. Task and Multi-tasking : Before understanding Thread, first we will try to Read More
Java 8 – How to find and count duplicate values in a Map or HashMap ?
In this article, we will discuss how to find and count duplicate values in a Map or HashMap Find & Count duplicate values in a Read More
Java – How to reverse a Queue ?
In this article, we will discuss how to reverse a Queue in different ways Reverse a Queue : There are different ways to reverse a Read More
Java – How to find Maximum and Minimum Key/Value in a Map ?
In this article, we will discuss how to find maximum & minimum Map Key & Value 1. Maximum & Minimum Map Key : FindMaximumMinimumMapKey.java Output Read More
Java 8 – How to remove an entry based on the Value in a Map or HashMap ?
In this article, we will discuss how to remove an entry based on the Value in a HashMap using Java 8 Stream Remove an entry Read More
Java 8 – How to find an entry based on the Value in a Map or HashMap ?
In this article, we will discuss how to find an entry based on the Value in a HashMap using Java 8 Stream Find an entry Read More
Java 8 – How to remove an entry based on the Key in a Map or HashMap ?
In this article, we will discuss how to remove an entry based on the Key in a HashMap using Java 8 Stream Remove an entry Read More
Java 8 – How to find an entry based on the Key in a Map or HashMap ?
In this article, we will discuss how to find an entry based on the Key in a HashMap using Java 8 Stream Find an entry Read More