Design Patterns and Best Practices in Java

Single responsibility principle

The single responsibility principle is an object-oriented design principle that states that a software module should have only one reason to change. In most cases, when writing Java code, we will apply this to classes.

The single responsibility principle can be regarded as a good practice for making encapsulation work at its best. A reason to change is something that triggers the need to change the code. If a class is subject to more than one reason to change, each of them might introduce changes that affect others. When those changes are managed separately but affect the same module, one set of changes might break the functionality related to the other reasons for change.

On the other hand, each responsibility/reason ...