Given：
What is the result？（）
A. An exception is thrown at runtime.
B. r， e， o，
C. Compilation fails.
D. r， t， t，
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Given： ClassA a = new ClassA（）；
a.methodA（）；
What is the result？（）
A. The code runs with no output.
B. Compilation fails.
C. An exception is thrown at runtime.
D. ClassC is displayed.
Given：
What is the result of calling search with a valid List implementation？ （）
A. 0
B. The result is undefined.
C. a
D. 2
E. 1
F. c
G. b
Given the command line java Pass2 and：
What is the result？ （）
A. doStuff x = 6 main x = 6
B. Compilation fails.
C. doStuff x = 6 main x = 7
D. An exception is thrown at runtime.
E. doStuff x = 7 main x = 6
F. doStuff x = 7 main x = 7
Given：
Which five methods， inserted independently at line 5， will compile？（）
A. protected int blipvert（long x） { return 0； }
B. protected long blipvert（int x） { return 0； }
C. private int blipvert（long x） { return 0； }
D. private int blipvert（int x） { return 0； }
E. public int blipvert（int x） { return 0； }
F. protected long blipvert（long x） { return 0； }
G. protected long blipvert（int x， int y） { return 0； }
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What is the result？（）
A. The code will deadlock.
B. The code may run with output "2 0 6 4".
C. The code may run with no output.
D. The code may run with output "0 6".
E. An exception is thrown at runtime.
F. The code may run with output "0 2 4 6".
Given：
Which code， inserted at line 15， creates an instance of the Point class defined in Line？（）
A. Line l = new Line（） ； l.Point p = new l.Point（）；
B. Line.Point p = new Line.Point（）；
C. The Point class cannot be instatiated at line 15.
D. Point p = new Point（）；
Given：
11. public static void main（String[] args） {
12. Object obj = new int[] { 1， 2， 3 }；
13. int[] someArray = （int[]）obj；
14. for （int i ： someArray） System.out.print（i + " "）；
15. }
What is the result？ （）
A. Compilation fails because of an error in line 13.
B. A ClassCastException is thrown at runtime.
C. 1 2 3
D. Compilation fails because of an error in line 14.
E. Compilation fails because of an error in line 12.
Given：
10. interface Jumper { public void jump（）； } ...
20. class Animal {} ...
30. class Dog extends Animal {
31. Tail tail；
32. }
...
40. class Beagle extends Dog implements Jumper{
41. public void jump（） {}
42. }
...
50. class Cat implements Jumper{
51. public void jump（） {}
52. }.
Which three are true？（）
A. Cat is-a Jumper
B. Cat is-a Animal
C. Dog is-a Jumper
D. Dog is-a Animal
E. Beagle has-a Jumper
F. Cat has-a Animal
G. Beagle has-a Tail
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Given：
Which two statements are true if a NullPointerException is thrown on line 3 of class C？（）
A. The application will crash.
B. The code on line 29 will be executed.
C. The code on line 5 of class A will execute.
D. The exception will be propagated back to line 27.
E. The code on line 5 of class B will execute.
Given：
What is the result？ （）
A. A new Item object is created with the preferred value in the id attribute.
B. The attribute id in the Item object is modified to the new value.
C. Compilation fails.
D. An exception is thrown at runtime.
E. The attribute id in the Item object remains unchanged.
最新试题
Click the Exhibit button. Given：Which two statements are true if a NullPointerException is thrown on line 3 of class C？（）
Given： 11. public void genNumbers（） { 12. ArrayList numbers = new ArrayList（）； 13. for （int i=0； i<10； i++） {14. int value = i * （（int） Math.random（））； 15. Integer intObj = new Integer（value）； 16. numbers.add（intObj）； 17. } 18. System.out.println（numbers）； 19. } Which line of code marks the earliest point that an object referenced by intObj becomes a candidate for garbage collection？（）
Given： What is the result？（）
Given： 10. class One { 11. void foo（） { } 12. } 13. class Two extends One { 14. //insert method here 15. } Which three methods， inserted individually at line 14， will correctly complete class Two？（）
A JavaBeans component has the following field： 11. private boolean enabled； Which two pairs of method declarations follow the JavaBeans standard for accessing this field？（）
Given： 12. System.out.format（"Pi is approximately %d."， Math.PI）； What is the result？（）
Given：Which five methods， inserted independently at line 5， will compile？（）
Given：What is the result？（）
Given：10. interface Jumper { public void jump（）； } ... 20. class Animal {} ... 30. class Dog extends Animal { 31. Tail tail； 32. } ... 40. class Beagle extends Dog implements Jumper{ 41. public void jump（） {} 42. } ... 50. class Cat implements Jumper{ 51. public void jump（） {} 52. }.Which three are true？（）
Click the Exhibit button. Given： ClassA a = new ClassA（）； a.methodA（）； What is the result？（）