By Philip Heller

Here's a revised and superior version of the main respected Java certification advisor, with in-depth assurance of the newest types of the Java Programmer and Developer tests. Written by way of the folk who truly created the assessments for solar, this insider's advisor will arrange you to take those scorching assessments with self belief. Sybex learn courses are jam-packed with unheard of examine tools--hundreds of tough evaluate questions and digital flashcards that aid strengthen key themes, and real-world eventualities that provide views and insights from pro execs. The CD comprises a complicated checking out engine with hundreds of thousands of pattern examination questions and the whole e-book in PDF.

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MyValue[0]); 7. } 8. public static void modifyIt(int [] value) { 9. 10. value[0]++; } 11. } In most JVMs, the reference value is actually the address of an address. This second address refers to the real data. This approach, called double indirection, allows the garbage collector to relocate objects to reduce memory fragmentation. When Java code appears to store objects in variables or pass objects into method calls, the object references are stored or passed. Consider this code fragment: 1. 2.

For example: char c1 = ’\u4567’; Java supports a few escape sequences for denoting special characters: ’\n’ for new line ’\r’ for return ’\t’ for tab ’\b’ for backspace ’\f’ for formfeed ’\’’ for single quote ’\” ’ for double quote ’\\’ for backslash Integral literals may be assigned to any numeric primitive data type. They may be expressed in decimal, octal, or hexadecimal. The default is decimal. To indicate octal, prefix the literal with 0 (zero). To indicate hexadecimal, prefix the literal with 0x or 0X; the hex digits may be upper- or lowercase.

A floating-point literal expresses a floating-point number. 828f The suffix D or d, indicating a double literal, such as 1234d A floating-point literal with no F or D suffix defaults to double type. String Literals A string literal is a sequence of characters enclosed in double quotes. ”; Java provides many advanced facilities for specifying non-literal string values, including a concatenation operator and some sophisticated constructors for the String class. ” Arrays A Java array is an ordered collection of primitives, object references, or other arrays.

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