Given:
11. // insert code here
12. private N min, max;
13. public N getMin() { return min; }
14. public N getMax() { return max; }
15. public void add(N added) {
16. if (min == null || added.doubleValue() < min.doubleValue())
17. min = added;
18. if (max == null || added.doubleValue() > max.doubleValue())
19. max = added;
20. }
21. }
Which two, inserted at line 11, will allow the code to compile?()
A.A
B.B
C.C
D.D
E.E
F.F
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Given:
12. NumberFormat nf = NumberFormat.getInstance();
13. nf.setMaximumFractionDigits(4);
14. nf.setMinimumFractionDigits(2);
15. String a = nf.format(3.1415926);
16. String b = nf.format(2);
Which two statements are true about the result if the default locale is Locale.US?()
A. The value of b is 2.00.
B. The value of a is 3.141.
C. The value of a is 3.14.
D. The value of b is 2.0000.
E. The value of a is 3.1415.
F. The value of a is 3.1416.
G. The value of b is 2.
Click the Exhibit button.
What is the output of the program shown in the exhibit? ()
A. 300-300-100-100-100
B. 300-300-300-100-100
C. 300-300-300-300-100
D. 300-100-100-100-100
Given:
What is the result?()
A. If you define D e = new E(), then e.bMethod() invokes the version of bMethod() defined in Line 5.
B. If you define D e = (D)(new E()), then e.bMethod() invokes the version of bMethod() defined in Line 5.
C. Compilation fails because of an error in line 9.
D. If you define D e = (D)(new E()), then e.bMethod() invokes the version of bMethod() defined in Line 9.
E. Compilation fails because of an error in line 3.
F. Compilation fails because of an error in line 7.
Given:
11. static class A {
12. void process() throws Exception { throw new Exception(); }
13. }
14. static class B extends A {
15. void process() { System.out.println("B "); }
16. }
17. public static void main(String[] args) {
18. A a = new B();
19. a.process();
20. }
What is the result? ()
A. Compilation fails because of an error in line 19.
B. An exception is thrown at runtime.
C. B
D. Compilation fails because of an error in line 18.
E. Compilation fails because of an error in line 15.
F. The code runs with no output.
Given:
12. System.out.format("Pi is approximately %d.", Math.PI);
What is the result?()
A. An exception is thrown at runtime.
B. Pi is approximately 3.
C. Pi is approximately 3.141593.
D. Compilation fails.
Given:
11. String test = "This is a test";
12. String[] tokens = test.split("\s");
13. System.out.println(tokens.length);
What is the result?()
A. An exception is thrown at runtime.
B. 1
C. 4
D. Compilation fails.
E. 0
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?()
A. Line 19
B. The object is NOT a candidate for garbage collection.
C. Line 17
D. Line 16
E. Line 18
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?()
A.A
B.B
C.C
D.D
Given:
What is the result?()
A. An exception is thrown at runtime.
B. r, e, o,
C. Compilation fails.
D. r, t, t,
Click the Exhibit button.
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.
最新试题
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: Which code, inserted at line 15, creates an instance of the Point class defined in Line?()
Given: 11. // insert code here 12. private N min, max; 13. public N getMin() { return min; } 14. public N getMax() { return max; } 15. public void add(N added) { 16. if (min == null added.doubleValue() < min.doubleValue()) 17. min = added; 18. if (max == null added.doubleValue() > max.doubleValue()) 19. max = added; 20. } 21. } Which two, inserted at line 11, will allow the code to compile?()
Given:What is the result?()
Given:What is the result? ()
Given: 12. System.out.format("Pi is approximately %d.", Math.PI); 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?()
Given:Which five methods, inserted independently at line 5, will compile?()
Given: 12. NumberFormat nf = NumberFormat.getInstance(); 13. nf.setMaximumFractionDigits(4); 14. nf.setMinimumFractionDigits(2); 15. String a = nf.format(3.1415926); 16. String b = nf.format(2); Which two statements are true about the result if the default locale is Locale.US?()
Click the Exhibit button. Given this code from Class B: 25. A a1 = new A(); 26. A a2 = new A(); 27. A a3 = new A(); 28. System.out.println(A.getInstanceCount()); What is the result?()