Philip Heller's Complete Java 2 Certification Study Guide PDF

By Philip Heller

ISBN-10: 0782128254

ISBN-13: 9780782128253

Java 5.0 includes over a hundred advancements that simplify improvement, enhance functionality and manageability...and require a complete new set of certification checks. in case you are learning for the hot SCJP or SCJD, Phil Heller and Simon Roberts have made over their bestselling learn advisor to systematically prep you for Sun's new objectives.Part I systematically reports each goal at the Programmer's examination: operators, assignments, modifiers, changing, casting, circulation keep an eye on, assertions, exceptions, gadgets, periods, threads, java.lang, java.util, I/O, streams, and extra. subsequent, the authors flip to Sun's tricky programming assignments. The Developer examination calls for you to put in writing a considerable software with a Swing-built GUI shopper front-end, server back-end, and community communications. The authors stroll via all of this, revealing precisely what sunlight expects - and the no-no's that'll fail you instantly. since you don't desire to head via this pressure two times.

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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. The value 28 may thus be expressed six ways: 28 034 0x1c 0x1C 0X1c 0X1C Arrays 11 By default, an integral literal is a 32-bit value. To indicate a long (64-bit) literal, append the suffix L to the literal expression. ) 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.

2345. On line 2, a copy of this bit pattern is passed into the method-calling apparatus of the JVM. When an argument is passed into a method, changes to the argument value by the method do not affect the original data. Consider the following method: 1. public void bumper(int bumpMe) { 2. bumpMe += 15; 3. } Line 2 modifies a copy of the parameter passed by the caller. For example 1. int xx = 12345; 2. bumper(xx); 3. println(“Now xx is “ + xx); On line 2, the caller’s xx variable is copied; the copy is passed into the bumper() method and incremented by 15.

The StringBuilder class is compatible with StringBuffer but is not threadsafe and is generally faster. See Chapter 8 for more information. 22. D. The sizes of the primitives are as follows: byte, 8 bits; char, 16 bits; short, 16 bits; int, 32 bits; float, 32 bits; long, 64 bits; double, 64 bits. The Java specification does not state the size of a boolean, so it is not accurate to call it the smallest primitive. See Chapter 1 for more information. 23. D. DateFormat class formats date and time data into strings that are appropriate to locales.

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Complete Java 2 Certification Study Guide by Philip Heller

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