Javarevisited

Hello guys, if you are looking for an answer of popular Java interview question, how HashMap works in Java? or How HashMap works internally ...

I have read many articles on Garbage Collection in Java, some of them are too complex to understand and some of them don’t contain enough i...

Writing or creating immutable classes in Java is becoming popular day by day, because of the concurrency and multithreading ad...

Hello guys, I have been sharing a lot of roadmaps to become a Web developer , DevOps engineer , and recently React.js developer . One of th...

Error: Could not find or load main class HelloWorld comes when you are trying to run your Java program using java command with the main cl...

What is Enum in Java Enum in Java is a keyword, a feature that is used to represent a fixed number of well-known values in Java, For exam...

Time is changing and so is Java interviews. Gone are the days, when knowing the difference between String and StringBuffer can help you to g...

Write a Java program to find the first non-repeated character in a String is a common question on coding tests. Since String is a popular...

Java has very good networking support, allows you to write client-server applications by using TCP Sockets. In this tutorial, we will learn...

Hello guys, if you are working in a Java and Spring Boot project and you are getting errors like "@Autowired - No qualifyin...