Template Method Pattern

Template Method is classic Java because the language and standard libraries have long used inheritance-based frameworks and skeletal base classes.

The pattern is strongest when:

• the algorithm structure is stable
• subclasses should vary only a few steps
• inheritance is already a natural boundary

It is weaker in modern Java when composition or Strategy would communicate variation more directly.

In this section

• Implementing Template Method in Java
  Implement Template Method in Java by fixing algorithm structure in a base type and deferring selected steps to subclasses.
• Hook Methods in the Template Method Pattern
  Use Template Method hooks in Java when subclasses need optional extension points without overriding the whole algorithm.
• Fixed Algorithm Structure in the Template Method Pattern
  Keep the Java Template Method skeleton stable so subclasses vary steps without silently changing the overall algorithm contract.
• Template Method Pattern Use Cases and Examples in Java
  See where Template Method genuinely helps in Java systems, especially in framework base classes, exporters, processors, and skeletal APIs.