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10. public class Bar {  11.static void foo(int...x) {  12. // insert code here  13. }  14. }  Which two code fragments, inserted independently at line 12, will allow the class to compile?()A、 foreach(x) System.out.println(z);B、 for(int z : x) System.out.

题目

10. public class Bar {  11.static void foo(int...x) {  12. // insert code here  13. }  14. }  Which two code fragments, inserted independently at line 12, will allow the class to compile?()

  • A、 foreach(x) System.out.println(z);
  • B、 for(int z : x) System.out.println(z);
  • C、 while( x.hasNext()) System.out.println( x.next());
  • D、 for( int i=0; i< x.length; i++ ) System.out.println(x[i]);

相似考题
更多“10. public class&ensp”相关问题
  • 第1题:

    1. public class A {  2. public void doit() {  3. }  4. public String doit() {  5. return “a”;  6. }  7. public double doit(int x) {  8. return 1.0;  9. }  10.}  What is the result?() 

    • A、 An exception is thrown at runtime.
    • B、 Compilation fails because of an error in line 7.
    • C、 Compilation fails because of an error in line 4.
    • D、 Compilation succeeds and no runtime errors with class A occur.

    正确答案:C

  • 第2题:

    1. public class X {  2. public object m ()  {  3. object o = new float (3.14F);  4. object [] oa = new object [1]; 5. oa[0]= o;  6. o = null;  7. oa[0] = null;  10. return o;  9. }  10. }  When is the float object created in line 3, eligible for garbage collection?()  

    • A、 Just after line 5.
    • B、 Just after line 6.
    • C、 Just after line 7.
    • D、 Just after line 8(that is, as the method returns).

    正确答案:C

  • 第3题:

    多选题
    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


    正确答案: E,B
    解析: 暂无解析

  • 第4题:

    单选题
    10. interface Foo { int bar(); }  11. public class Sprite {  12. public int fubar( Foo foo) { return foo.bar(); }  13. public void testFoo() {  14. fubar(  15. // insert code here  16.);  17. }  18. }  Which code, inserted at line 15, allows the class Sprite to compile?()
    A

     Foo { public int bar() { return 1; } }

    B

     new Foo { public int bar() { return 1; } }

    C

     newFoo() { public int bar(){return 1; } }

    D

     new class Foo { public int bar() { return 1; } }


    正确答案: A
    解析: 暂无解析

  • 第5题:

    单选题
    1. public class SimpleCalc {  2. public int value;  3. public void calculate() { value += 7; }  4. } And:  1. public class MultiCalc extends SimpleCalc {  2. public void calculate() { value -= 3; }  3. public void calculate(int multiplier) {  4. calculate();  5. super.calculate();  6. value *=multiplier;  7. }  8. public static void main(String[] args) {  9. MultiCalc calculator = new MultiCalc();  10. calculator.calculate(2);  11. System.out.println(”Value is: “+ calculator.value);  12. }  13. }  What is the result?()
    A

     Value is: 8

    B

     Compilation fails.

    C

     Value is: 12

    D

     Value is: -12

    E

     The code runs with no output.

    F

     An exception is thrown at runtime.


    正确答案: A
    解析: 暂无解析

  • 第6题:

    单选题
    1. interface A { public void aMethod(); }  2. interface B { public void bMethod(); }  3. interface C extends A,B { public void cMethod(); }  4. class D implements B {  5. public void bMethod() { }  6. }  7. class E extends D implements C {  8. public void aMethod() { }  9. public void bMethod() { }  10. public void cMethod() { }  11. }  What is the result?()
    A

     Compilation fails because of an error in line 3.

    B

     Compilation fails because of an error in line 7.

    C

     Compilation fails because of an error in line 9.

    D

     If you define D e = new E(), then e.bMethod() invokes the version of bMethod()defined in Line 5.

    E

     If you define D e = (D)(new E()),then e.bMethod() invokes the version of bMethod() defined in Line 5.

    F

     If you define D e = (D)(new E()), then e.bMethod() invokes the version of bMethod() defined in Line 9.


    正确答案: E
    解析: 暂无解析

  • 第7题:

    单选题
    1. public class X {  2. public static void main (String[]args)   {  3. int [] a = new int [1]  4. modify(a);  5. System.out.printIn(a[0]);  6. }  7.    8. public static void modify (int[] a)  {  9.   a[0] ++;  10.    } 11. }       What is the result?()
    A

     The program runs and prints “0”

    B

     The program runs and prints “1”

    C

     The program runs but aborts with an exception.

    D

     An error “possible undefined variable” at line 4 causes compilation to fail.

    E

     An error “possible undefined variable” at line 9 causes compilation to fail.


    正确答案: E
    解析: 暂无解析

  • 第8题:

    单选题
    1. public class test (  2. public static void main(string args[]) {  3. int 1= 0;  4. while (i)  {  5. if (i==4) {  6. break;  7. }  8. ++i;  9. }  10.    11. }  12. )   What is the value of i at line 10?()
    A

     0

    B

     3

    C

     4

    D

     5

    E

     The code will not compile.


    正确答案: D
    解析: 暂无解析

  • 第9题:

    单选题
    10. public class ClassA {  11. public void methodA() {  12. ClassB classB = new ClassB();  13. classB.getValue();  14. }  15. }  And:  20. class ClassB {  21. public ClassC classC;  22.  23. public String getValue() {  24. return classC.getValue();  25. }  26. }  And:  30. class ClassC {  31. public String value;  32.  33. public String getValue() {  34. value = “ClassB”;  35. return value;  36. }  37. }  Given:  ClassA a = new ClassA();  a.methodA();  What is the result?()
    A

     Compilation fails.

    B

     ClassC is displayed.

    C

     The code runs with no output.

    D

     An exception is thrown at runtime.


    正确答案: C
    解析: 暂无解析

  • 第10题:

    单选题
    1.public class Test {  2.public static void main (String args[]) {  3.class Foo {  4.public int i = 3;  5.}  6.Object o = (Object) new Foo();  7.Foo foo = (Foo)o;  8.System.out.printIn(foo. i); 9. }  10.}   What is the result?()
    A

     Compilation will fail.

    B

     Compilation will succeed and the program will print “3”

    C

     Compilation will succeed but the program will throw a ClassCastException at line 6.

    D

     Compilation will succeed but the program will throw a ClassCastException at line 7.


    正确答案: A
    解析: 暂无解析

  • 第11题:

    1. public class X {  2. public static void main (String[]args)   {  3. int [] a = new int [1]  4. modify(a);  5. System.out.printIn(a[0]);  6. }  7.    8. public static void modify (int[] a)  {  9.   a[0] ++;  10.    } 11. }       What is the result?()

    • A、 The program runs and prints “0”
    • B、 The program runs and prints “1”
    • C、 The program runs but aborts with an exception.
    • D、 An error “possible undefined variable” at line 4 causes compilation to fail.
    • E、 An error “possible undefined variable” at line 9 causes compilation to fail.

    正确答案:B

  • 第12题:

    单选题
    1. public class X {  2. public object m ()  {  3. object o = new float (3.14F);  4. object [] oa = new object [1]; 5. oa[0]= o;  6. o = null;  7. oa[0] = null;  10. return o;  9. }  10. }  When is the float object created in line 3, eligible for garbage collection?()
    A

     Just after line 5.

    B

     Just after line 6.

    C

     Just after line 7.

    D

     Just after line 8(that is, as the method returns).


    正确答案: D
    解析: 暂无解析

  • 第13题:

    单选题
    1. public class A {  2. public void doit() {  3. }  4. public String doit() {  5. return “a”;  6. }  7. public double doit(int x) {  8. return 1.0;  9. }  10.}  What is the result?()
    A

     An exception is thrown at runtime.

    B

     Compilation fails because of an error in line 7.

    C

     Compilation fails because of an error in line 4.

    D

     Compilation succeeds and no runtime errors with class A occur.


    正确答案: C
    解析: 暂无解析

  • 第14题:

    单选题
    1. public class Outer{  2. public void someOuterMethod() {  3. // Line 3  4. }  5. public class Inner{}  6. public static void main( String[]argv ) {  7. Outer o = new Outer();  8. // Line 8  9. }  10. }  Which instantiates an instance of Inner?()
    A

     new Inner(); // At line 3

    B

     new Inner(); // At line 8

    C

     new o.Inner(); // At line 8

    D

     new Outer.Inner(); // At line 8


    正确答案: D
    解析: 暂无解析

  • 第15题:

    单选题
    10. class Line {  11. public class Point { public int x,y; }  12. public Point getPoint() { return new Point(); }  13. }  14. class Triangle {  15. public Triangle() {  16. // insert code here  17. }  18. }  Which code, inserted at line 16, correctly retrieves a local instance of a Point object?()
    A

     Point p = Line.getPoint();

    B

     Line.Point p = Line.getPoint();

    C

     Point p = (new Line()).getPoint();

    D

     Line.Point p = (new Line()).getPoint();


    正确答案: A
    解析: 暂无解析

  • 第16题:

    单选题
    1. class SuperClass {  2. public a geta() {  3. return new a();  4. }  5. }  6. class SubClass extends SuperClass {  7. public b geta() {  8. return new b();  9. }  10. }  Which is true?()
    A

     Compilation will succeed if a extends b.

    B

     Compilation will succeed if b extends a.

    C

     Compilation will always fail because of an error in line 7.

    D

     Compilation will always fail because of an error in line 8.


    正确答案: A
    解析: 暂无解析

  • 第17题:

    单选题
    10. public class ClassA {  11. public void count(int i) {  12. count(++i);  13. }  14. }  And:  20. ClassA a = new ClassA();  21. a.count(3);  Which exception or error should be thrown by the virtual machine?()
    A

     StackOverflowError

    B

     NullPointerException

    C

     NumberFormatException

    D

     IllegalArgumentException

    E

     ExceptionlnlnitializerError


    正确答案: B
    解析: 暂无解析

  • 第18题:

    多选题
    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 Animal

    B

    Cat is-a Jumper

    C

    Dog is-a Animal

    D

    Dog is-a Jumper

    E

    Cat has-a Animal

    F

    Beagle has-a Tail

    G

    Beagle has-a Jumper


    正确答案: G,B
    解析: 暂无解析

  • 第19题:

    单选题
    10. class Nav{  11. public enum Direction { NORTH, SOUTH, EAST, WEST }  12. }  13. public class Sprite{  14. // insert code here  15. }  Which code, inserted at line 14, allows the Sprite class to compile?()
    A

     Direction d = NORTH;

    B

     Nav.Direction d = NORTH;

    C

     Direction d = Direction.NORTH;

    D

     Nav.Direction d = Nav.Direction.NORTH;


    正确答案: A
    解析: 暂无解析

  • 第20题:

    单选题
    1. class Pizza {  2. java.util.ArrayList toppings;  3. public final void addTopping(String topping) {  4. toppings.add(topping); 5. }  6. }  7. public class PepperoniPizza extends Pizza {  8. public void addTopping(String topping) {  9. System.out.println(”Cannot add Toppings”);  10. }  11. public static void main(String[] args) {  12. Pizza pizza = new PepperoniPizza();  13. pizza.addTopping(”Mushrooms”);  14. }  15. }  What is the result?()
    A

     Compilation fails.

    B

     Cannot add Toppings

    C

     The code runs with no output.

    D

     A NullPointerException is thrown in Line 4.


    正确答案: B
    解析: 暂无解析