Java Best Practices

When creating a Java application, the following best practices should be considered:

  • Program to an interface, not an implementation.
  • A class should have only one reason to change.
  • Identify the code that vary and separate it from the code that remains the same.
  • No principle is a law. Principles just provide guidance. Hence should be used when and where they are helpful.
  • All designs have tradeoffs like abstraction vs speed, time vs space. Hence, all factors should be taken into account before applying them.
  • Favor composition over inheritance.
  • Classes should be open for extension but closed for modification.
  • Depend on abstraction. Do not depend on concretion.
  • Only talk to your friend.
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