A Programmer’s Guide to Java™ SCJP Certification: A Comprehensive Primer, Third Edition > Object Lifetime

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A Programmer’s Guide to Java™ SCJP Certification: A Comprehensive Primer, Third Edition

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Ch. 1. Basics of Java Programming

Ch. 2. Language Fundamentals

Ch. 3. Declarations

Ch. 4. Access Control

Ch. 5. Operators and Expressions

Ch. 6. Control Flow

Ch. 7. Object-Oriented Programming

Ch. 8. Nested Type Declarations

Ch. 9. Object Lifetime

Garbage Collection

Reachable Objects

Facilitating Garbage Collection

Object Finalization

Finalizer Chaining

Invoking Garbage Collection Programmatically

Review Questions

Initializers

Field Initializer Expressions

Static Initializer Blocks

Instance Initializer Blocks

Constructing Initial Object State

Review Questions

Chapter Summary

Ch. 10. Fundamental Classes

Ch. 11. Files and Streams

Ch. 12. Localization, Pattern Matching, and Formatting

Ch. 13. Threads

Ch. 14. Generics

Ch. 15. Collections and Maps

Appx. A. Taking the SCJP 1.6 Exam

Appx. B. Objectives for the SCJP 1.6 Exam

Appx. C. Objectives for the SCJP 1.6 Upgrade Exam

Appx. D. Annotated Answers to Review Questions

Appx. E. Solutions to Programming Exercises

Appx. F. Mock Exam

Appx. G. Number Systems and Number Representation

Index

9. Object Lifetime

Exam Objectives

1.3

Develop code that declares, initializes, and uses primitives, arrays, enums, and objects as static, instance, and local variables. Also, use legal identifiers for variable names.

Initializers are covered in this chapter.
For primitive types, see Section 2.2, p. 28.
For arrays, see Section 3.6, p. 69.
For enums, see Section 3.5, p. 54.
For initialization of static, instance, and local variables, see Section 2.3, p. 31

7.4 Given a code example, recognize the point at which an object becomes eligible for garbage collection, and determine what is and is not guaranteed by the garbage collection system, and recognize the behaviors of the Object.finalize() method.

Supplementary Objectives

Understand the declaration order of initializers.

Understand forward references in initializers.

Understand exception handling in initializers.

Understand the procedure involved in initializing the object state when an object is created using the new operator.

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