Book Image

Oracle Certified Associate, Java SE 7 Programmer Study Guide

By : Richard M. Reese
Book Image

Oracle Certified Associate, Java SE 7 Programmer Study Guide

By: Richard M. Reese

Overview of this book

<p>Java SE 7 Associate Programmer certification adds to your qualification as a Java developer. Knowledge of Java is important, but knowing how to write an efficient and productive code adds to your skills and gives you an edge when you are planning to give the certification exam. Coverage of the objectives goes beyond a simple review of certification objectives.</p> <p>"Oracle Certified Associate, Java SE 7 Programmer Study Guide" addresses certification exam objectives and provides discussion and examples to show the best ways of applying Java language features in real world programming. You will gain in-depth understanding of Java by examining how objects are allocated in the heap and how methods are managed in the program stack.<br /><br />"Oracle Certified Associate, Java SE 7 Programmer Study Guide" covers all of the Java SE 7 Associate Programmer certification objectives. It starts with a high level overview of an application’s structure to provide a framework for subsequent chapters. Chapters are organized around common themes with emphasis on memory usage. You will get an in-depth and complete understanding of the run-time Java environment using the illustrations that show the impact of class and method usage on the program stack and heap. <br /><br />Augmenting the coverage of certification objectives are examples of how you can use the classes, methods, and techniques in a productive and sound manner. In addition, sample exam questions are given in each chapter.</p>
Table of Contents (16 chapters)
Oracle Certified Associate, Java SE 7 Programmer Study Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface

Logical expressions


As with all expressions, a logical expression consists of operators and operands. In Java there are a limited number of logical operators as summarized in the following table. It is a subset of the operators listed in Chapter 2, Java Data Types and Their Usage:

Precedence

Operator

Associativity

Meaning

1

  

!

Right

Logical complement

  

   

5

<, <=, >, and >=

Left

Logical

instanceof

Left

Type comparison

6

== and !=

Left

Equality and inequality

   

10

&&

Left

Logical AND

11

||

Left

Logical OR

12

?:

Right

Conditional

   

The operands of a logical expression may be of any data type, but a logical expression will always evaluate to a true or a false value.

Note

Do not confuse the bitwise operators, &, ^, and | with the corresponding logical operators && and ||. The bitwise operators perform similar operations as the logical operators, but do it on a bit-by-bit basis.

Boolean variables

The words...