Google Guava belongs to the Guava project of Google. The String Utilities in Google Guava library offers several helper methods for working with Strings.

An EnumSet in Java is a specialized Set implementation meant to be used with enum types. All the elements in an EnumSet are enum instances.

A TreeMap is a Red-Black Tree based implementation of a NavigableMap. In this post, we will look at TreeMap in Java and the methods offered by them.

A Map data structure is an object that maps keys to values. We will see how a HashMap works in java. We will also see how get and put operations work.

The Iterator Design Pattern provides a way to access the elements of an aggregate object sequentially without exposing its underlying representation.

An immutable class is a class whose instances cannot be modified after it is created. In this post, we will look at the benefits of immutable class in Java.

An immutable class is one that does not change its state after its construction. In this post, we will learn how to make a class immutable.

The Apache Commons CSV can be used for reading and writing Comma Separated Value (CSV) files. It is part of the Apache Commons project.

Checked exceptions are checked at compile time whereas unchecked exceptions are not. Unchecked exceptions generally denote programming errors.

A method reference is a reference to an existing method. When a lambda expression just calls an existing method, we can use a Method Reference.