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Fast track to Sun Certified Java Programmer (SCJP) 5.0 by Ka Iok Tong

By Ka Iok Tong

If you would like to benefit the hot good points in Java SE 5.0 and cross the solar qualified Java Programmer improve examination (CX-310-056), then this publication is for you. It covers the entire Java SE 5.0 new good points required within the examination. you don't want to examine the present good points that you simply already recognize. 117 overview questions and ridicule examination questions are integrated.

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There is no need to typecast at line 17. 7. Assuming the same Shape and Rect classes as above, what is true about the following code? 1. 2. add(new Rect(5, 3)); a. There will be a compilation error at line 1. b. There will be a compilation error at line 2. c. There will be a runtime error at line 2. d. It will compile and run just fine. 8. Assuming the same Shape and Rect classes as above, what is true about the following code? 1. 2. add(new Rect(5, 3)); a. There will be a compilation error at line 1.

A. idx >= 0 b. idx > 0 c. idx < 0 d. isNaN(idx) 5. What is true about the code below? 1. 2. 3. 4. 5. toArray(); } } a. There is a compile error at line 2. b. There is a compile error at line 3. c. There will be a runtime error at line 3. d. It will compile and run just fine. 6. What is true about the code below? 1. 2. 3. add(10); a. There is a compile error at line 2. b. There is a compile error at line 3. c. There will be a runtime error at line 3. d. It will compile and run just fine. Manipulating Collections 63 Answers to the mock exam 1.

G(new ArrayList()); It will print "b". println("b"); } } ... g(new ArrayList()); It will still work and print "b". Why allow it? The purpose is that a library developer (the person writing Foo) can use generic code while still allowing the library clients (Bar) to use non-generic code. As another example, the Comparable interface is like: class Comparable { int compareTo(T obj); } To override it, you may write: Generics 33 class Animal implements Comparable { public int compareTo(Animal obj) { ...

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