tzoght/effective-java

Summarized version of Effective Java 2nd Edition.

effective-java

Summarized version of Effective Java 2nd Edition.

Chapter 2: Creating and Destroying Objects

• Item 1: Consider static factory methods instead of constructors
• Item 2: Consider a builder when faced with many constructor parameters
• Item 3: Enforce the singleton property with a private constructor or an enum type
• Item 4: Enforce noninstantiability with a private constructor
• Item 5: Avoid creating unnecessary objects
• Item 6: Eliminate obsolete object references
• Item 7: Avoid finalizers

Chapter 3: Methods Common to All Objects

• Item 8: Obey the general contract when overriding equals
• Item 9: Always override hashCode when you override equals
• Item 10: Always override toString
• Item 11: Override clone judiciously
• Item 12: Consider implementing Comparable

Chapter 4: Classes and Interfaces

• Item 13: Minimize the accessibility of classes and members
• Item 14: In public classes, use accessor methods, not public fields
• Item 15: Minimize mutability
• Item 16: Favor composition over inheritance
• Item 17: Design and document for inheritance or else prohibit it
• Item 18: Prefer interfaces to abstract classes
• Item 19: Use interfaces only to define types
• Item 20: Prefer class hierarchies to tagged classes
• Item 21: Use function objects to represent strategies
• Item 22: Favor static member classes over nonstatic

Chapter 5: Generics

• Item 23: Don’t use raw types in new code
• Item 24: Eliminate unchecked warnings
• Item 25: Prefer lists to arrays
• Item 26: Favor generic types
• Item 27: Favor generic methods
• Item 28: Use bounded wildcards to increase API flexibility
• Item 29: Consider type safe heterogeneous containers

Chapter 6: Enums and Annotations

• Item 30: Use enums instead of int constants
• Item 31: Use instance fields instead of ordinals
• Item 32: Use EnumSet instead of bit fields
• Item 33: Use EnumMap instead of ordinal indexing
• Item 34: Emulate extensible enums with interfaces
• Item 35: Prefer annotations to naming patterns
• Item 36: Consistently use the Override annotation
• Item 37: Use marker interfaces to define types

Chapter 7: Methods

• Item 38: Check parameters for validity
• Item 39: Make defensive copies when needed
• Item 40: Design method signatures carefully
• Item 41: Use overloading judiciously
• Item 42: Use varargs judiciously
• Item 43: Return empty arrays or collections, not nulls
• Item 44: Write doc comments for all exposed API elements

Chapter 8: General Programming

• Item 45: Minimize the scope of local variables
• Item 46: Prefer for-each loops to traditional for loops
• Item 47: Know and use the libraries
• Item 48: Avoid float and double if exact answers are required
• Item 49: Prefer primitive types to boxed primitives
• Item 50: Avoid strings where other types are more appropriate
• Item 51: Beware the performance of string concatenation
• Item 52: Refer to objects by their interfaces
• Item 53: Prefer interfaces to reflection
• Item 54: Use native methods judiciously
• Item 55: Optimize judiciously
• Item 56: Adhere to generally accepted naming conventions

Chapter 9: Exceptions

• Item 57: Use exceptions only for exceptional conditions
• Item 58: Use checked exceptions for recoverable conditions and runtime exceptions for programming errors
• Item 59: Avoid unnecessary use of checked exceptions
• Item 60: Favor the use of standard exceptions
• Item 61: Throw exceptions appropriate to the abstraction
• Item 62: Document all exceptions thrown by each method
• Item 63: Include failure-capture information in detail messages
• Item 64: Strive for failure atomicity
• Item 65: Don’t ignore exceptions

Chapter 10: Concurrency

• Item 66: Synchronize access to shared mutable data
• Item 67: Avoid excessive synchronization
• Item 68: Prefer executors and tasks to threads
• Item 69: Prefer concurrency utilities to wait and notify
• Item 70: Document thread safety
• Item 71: Use lazy initialization judiciously
• Item 72: Don’t depend on the thread scheduler
• Item 73: Avoid thread groups

Chapter 11: Serialization

• Item 74: Implement Serializable judiciously
• Item 75: Consider using a custom serialized form
• Item 76: Write readObject methods defensively
• Item 77: For instance control, prefer enum types to readResolve
• Item 78: Consider serialization proxies instead of serialized instances