Learn how to change a String by inserting a new character at an arbitrary position.

A quick example and explanation of the lastIndexOf() API of the standard String class in Java.

How to rename or move a file in Java, using JDK6, JDK7, Guava or Apache Commons.

Learn how to use the toMap() method of the Collectors class.

Learn how to copy an array in Java, with examples of various methods.

Learn about JMH, the Java Microbenchmark Harness.

Learn about the storage area for String constant pool.

Learn the intricacies of the Map.computeIfAbsent method.

Uploading files is one of the most common operations in a web application. In this article we will look at how to upload file from an HTML page and copy

In our previous post, we saw how to upload a file using the Spring framework’s default implementation for MultipartFile interface. In this post, we will

Concurrency control can be an important part of a REST API, especially if you expect concurrent update requests for the same resource. In this post we

Explore different ways of reversing a String in Java.

Learn how to get up-and-running with Visual Studio Code support for Java.

Learn how to find the memory address of objects in Java

Learn the key differences between coarse-grained synchronization and fine-grained synchronization and how to implement them in Java.

A quick and practical introduction to HashMap performance optimization.

Sometimes we need to write our JMeter test data into a file. Let's explore how we can do that.

Learn how to use the Java File Class.

An introduction to the OptaPlanner library with a basic example of optimizing resource planning

Learn about the Java BigDecimal and the BigInteger data-types.

Compare the Java Stack class and the Deque interface and learn why we should use Deque over Stack for LIFO stacks