Complete Java 2 certification study guide - download pdf or read online

By Philip Heller

ISBN-10: 0782140777

ISBN-13: 9780782140774

Are looking to overcome of the main tricky programmer certifications? the recent variation of the best-selling entire Java 2 Certification research consultant is the source you wish. Authors Philip Heller and Simon Roberts, builders of Sun's Programmer and Developer checks for the Java 2 Platform, provide you with every thing you want to move the assessments the 1st time. This totally revised version is up to date for the alterations in either tests, together with insurance of recent pursuits for J2SE 1.4, a brand new emphasis on Swing and RMI, and data for tackling the hot layout of the Developer examination. The booklet is usually improved with all-new gains from Sybex's market-leading examine publications, together with examination crucial sections to augment key topic components and real-world situation sidebars with pattern programming assignments. The spouse CD comprises the entire assessment questions from the e-book, a tradition programmer's examination, and a hundred and fifty random-test questions, together with a hundred new questions. The CD additionally features a absolutely searchable digital variation of the e-book.

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The Boolean Complement Operator: ! The ! operator inverts the value of a boolean expression. false gives true. This operator is often used in the test part of an if() statement. The effect is to change the value of the affected expression. com The Unary Operators 37 the body of the if() and else parts can be swapped. Consider these two equivalent code fragments: 1. public Object myMethod(Object x) { 2. if (x instanceof String) { 3. // do nothing 4. } 5. else { 6. toString(); 7. } 8. return x; 9.

Conversely, if the operator is positioned to the right of an expression, then the value that is used in the rest of the calculation is the original value of that expression, and the increment or decrement occurs only after the expression has been calculated. 2 shows the values of x and y before and after particular assignments using these operators. com 36 Chapter 2 Operators and Assignments The Unary Plus and Minus Operators: + and The unary operators + and - are distinct from the more common binary + and - operators, which are usually just referred to as + and - (add and subtract).

Equality comparisons test whether two values are the same and may be applied to values of non-numeric types. Ordinal Comparisons with <, <=, >, and >= The ordinal comparison operators are: Less than: < Less than or equal to: <= Greater than: > Greater than or equal to: >= These are applicable to all numeric types and to char and produce a boolean result. 0F; char c = ‘A’; the following tests all return true: p < q f < q f <= c c > r c >= q Notice that arithmetic promotions are applied when these operators are used.

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Complete Java 2 certification study guide by Philip Heller

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