thread safe | The Blog Pros

November 15, 2021

Java Immutable Explained. Immutable Objects With Examples.

What This Article About

Immutability is a broad concept and has many angles. Immutability is a set of practices that potentially might reduce the number of bugs in your application. As a consequence, this subject invokes confusion. Here, we review it from a different perspective. I'll explain the most important immutability aspects in clear language.

Mutability Problems Examples

Before we start, let's review two examples. They are pretty artificial but explain potential problems with mutable code:

January 21, 2020

How to Write Thread-Safe-Yet-Scalable Classes

When writing thread-safe classes, the main issue is to separate the data into multiple independent parts — and to choose the right size for those parts. If the part is too small, our class is not thread-safe. If the part is too large, the class is not scalable.

You may also like: 7 Techniques for Thread-Safe Classes

Let us look at an example that further illustrates this scenario:

Java SimpleDateFormat Is Not Simple

Formatting and parsing dates is a daily (painful) task. Every day, it gives us another headache.

A common way to format and parse dates in Java is using SimpleDateFormat. Here is a common class we can use.

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