java features
Step 1: Use the Latest LTS Version Before diving into features, make sure you’re using a modern Java version. 
Recommendation: Use Java 17 or Java 21 (both are Long-Term Support versions). Why? Because these…
Java interview questions
1. Java 8 Features & Functional Programming This is the hottest topic on Java interviews currently and I have increasingly see interviewer looking for candidates who knows how to write…
DSA Java methods
Arrays:int[] arr = new int[size];int[] numbers = {1, 2, 3, 4, 5};int[][] matrix = {{1, 2, 3},{4, 5, 6},{7, 8, 9}};for( int num : nums).length Strings:.toCharArray() Hashmap: Map<Character, Integer> count…
Java interview questions
Hello friends, in the last 6 months, I have attended more than 50 Java interviews across different companies, ranging from startups to large enterprises like investment banks like UBS, Citi,…
Code best practices java
Here are 10 coding best practices that have helped me write better Java code— and how you can apply them in your projects. 1. Avoid Null References Using Optional Problem: NullPointerException is one…
Multithreading in Java
1. Key Concepts Thread: A lightweight process with its own execution path. Concurrency: Multiple tasks making progress within the same time frame. Parallelism: Tasks running simultaneously on multiple processors. 2.…
New Features in Java
Here’s a list of key features from Java 8 to Java 17 along with code examples for each feature. Java 8 (March 2014) Lambda ExpressionsLambda expressions enable you to pass…
Java Streams
Streams in Java 8 provide a powerful way to work with sequences of data in a declarative and functional style. Below is a comprehensive cheat sheet that covers key concepts,…
Garbage Collection
Java Garbage Collection (GC) Cheatsheet Garbage Collection (GC) in Java is an automatic memory management process that helps reclaim memory used by objects that are no longer referenced. The JVM…
JVM Internals
Here’s a quick cheat sheet on JVM internals, highlighting key concepts and components that are useful for understanding how the JVM works under the hood: 1. Java Virtual Machine Overview…