Example of SOLID principles in Java
Single Responsibility
A class should have one and only one reason to change, meaning that a class should have only one job.
Open Closed
Objects or entities should be open for extension but closed for modification.
Liskov Substitution
Every subclass or derived class should be substitutable for their base or parent class.
Interface Segregation
A client should never be forced to implement an interface that it doesn’t use, or clients shouldn’t be forced to depend on methods they do not use.
Dependency Inversion
Entities must depend on abstractions, not on concretions. It states that the high-level module must not depend on the low-level module, but they should depend on abstractions.