Core Java interview

31 December

Java Stream to List

In this post, we will see how to convert Stream to List in java. There are multiple ways to convert Stream to List in java. Using Collectors.toList() You can pass Collectors.toList() to Stream.collect() method to convert Stream to List in java. Stream’s collect method performs mutable reduction operation on elements of Stream and Collectors.toList() provides […]

28 August

A In-Depth guide to Java 8 Stream API

In this post, we will see an in-depth overview of Java 8 streams with a lot of examples and exercises. Introduction You may think that Stream must be similar to InputStream or OutputStream, but that’s not the case. A Stream represents a sequence of elements supporting sequential and parallel aggregate operations. Stream does not store […]

22 April

Java 8 Method reference

Java 8 has introduced a lot of new features such as lambda expressions, stream, Method references etc. In this post, we will see what are Method references and how can we use it. I will try to provide more examples rather than theory. Introduction to Method Reference Method references are special types of lambda expressions […]

22 October

Why wait(), notify() And notifyAll() methods are in Object Class

In this post, we will see why wait(), notify() And notifyAll() methods are in Object Class And Not in Thread Class. This is one of the most asked java multithreading interview questions. You might know that wait(), notify() And notifyAll() Methods are in Object class and do you know the reason for the same? Let’s […]

22 May

Java interview questions

I have written a lot of java interview questions and this is index posts for all java interview questions. I will keep adding more interview questions to this post. Core Java Core java interview questions This list includes top 50 core java interview questions. Whether you are fresher or experienced programmer, this interview questions will […]

17 November

Print sequence using 3 threads in java

In this post, we will see how to print sequence using 3 threads in java.It is similar to printing odd-even numbers using two threads in java. Problem You are given 3 threads. You need to print sequence using these 3 threads.You need to print in natural order up to MAX. For example: Let’s say you […]

09 November

SOLID Principles in Java

In this post, we will see 5 SOLID Principles in Java. Robert C. Martin gave five objected oriented design principles, and the acronym S.O.L.I.D is used for it. Each letter of this acronym talks about principles in Java. When you use all the principles of S.O.L.I.D in a combined manner, it becomes easier for you […]

08 November

Java interview questions for 2 years experience

In this post, we are going to see Java interview questions for 2 to 3 years experienced. These are the most asked interview questions for freshers(0-3 years experienced). This question list will help you to crack java interview. I have already shared detailed answer over here before, you might find it helpful as well. I […]

08 November

Java interview questions for 5 years experience

In this post, we will see Java interview questions for 5 to 6 years experience. When you have 5 years of experience as java developer, you need to have a good understanding of collections, multithreading concepts. If you are looking for the below queries then this post will help you as well. Java interview questions […]