单选题1. public class a {  2. public void method1() {  3. try {  4. B b=new b();  5. b.method2();  6. // more code here  7. } catch (TestException te) {  8. throw new RuntimeException(te);  9. }  10. }  11. }  1. public class b {  2. public void method2() th

题目
单选题
1. public class a {  2. public void method1() {  3. try {  4. B b=new b();  5. b.method2();  6. // more code here  7. } catch (TestException te) {  8. throw new RuntimeException(te);  9. }  10. }  11. }  1. public class b {  2. public void method2() throws TestException {  3. // more code here  4. }  5. }  1. public class TestException extends Exception {  2. }  Given:  31. public void method() {  32. A a=new a();  33. a.method1();  34. }  Which is true if a TestException is thrown on line 3 of class b?()
A

 Line 33 must be called within a try block.

B

 The exception thrown by method1 in class a is not required to be caught.

C

 The method declared on line 31 must be declared to throw a RuntimeException.

D

 On line 5 of class a, the call to method2 of class b does not need to be placed in a try/catch block.


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更多“单选题1. public class a {  2. public void method1() {  3. try {  4. B b=new b();  5. b.method2();  6. // more code here  7. } catch (TestException te) {  8. throw new RuntimeException(te);  9. }  10. }  11. }  1. public class b {  2. public void method2() th”相关问题
  • 第1题:

    1. public class a {  2. public void method1() {  3. try {  4. B b=new b();  5. b.method2();  6. // more code here  7. } catch (TestException te) {  8. throw new RuntimeException(te);  9. }  10. }  11. }  1. public class b {  2. public void method2() throws TestException {  3. // more code here  4. }  5. }  1. public class TestException extends Exception {  2. }  Given:  31. public void method() {  32. A a=new a();  33. a.method1();  34. }  Which is true if a TestException is thrown on line 3 of class b?()

    • A、 Line 33 must be called within a try block.
    • B、 The exception thrown by method1 in class a is not required to be caught.
    • C、 The method declared on line 31 must be declared to throw a RuntimeException.
    • D、 On line 5 of class a, the call to method2 of class b does not need to be placed in a try/catch block.

    正确答案:B

  • 第2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:A

  • 第3题:

    1. public class A {  2. public void method1() {  3. B b=new B();  4. b.method2();  5. // more code here  6. }  7. }  1. public class B {  2. public void method2() {  3.C c=new C();  4. c.method3();  5. // more code here  6. }  7. }  1. public class C {  2. public void method3() {  3. // more code here  4. }  5. }  Given:  25. try {  26. A a=new A();  27. a.method1();  28. } catch (Exception e) {  29. System.out.print(”an error occurred”);  30. }  Which two 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 code on line 5 of class B will execute.
    • E、 The exception will be propagated back to line 27.

    正确答案:B,E

  • 第4题:

    Given classes defined in two different files:  1. package util;  2. public class BitUtils {  3. public static void process(byte[]) { /* more code here */ }  4. }  1. package app;  2. public class SomeApp {  3. public static void main(String[] args) {  4. byte[] bytes = new byte[256];  5. // insert code here  6. }  7. }  What is required at line 5 in class SomeApp to use the process method of BitUtils?() 

    • A、 process(bytes);
    • B、 BitUtils.process(bytes);
    • C、 util.BitUtils.process(bytes);
    • D、 SomeApp cannot use methods in BitUtils.
    • E、 import util.BitUtils.*; process(bytes);

    正确答案:C

  • 第5题:

    现有:  1. interface Animal {  2. void eat();  3. }  4.  5. // insert code here  6.  7. public class HouseCat extends Feline {  8. public void eat() { }  9. }   和五个声明:  abstract class Feline implements Animal { }  abstract class Feline implements Animal { void eat(); }  abstract class Feline implements Animal { public void eat(); }  abstract class Feline implements Animal { public void eat() { } }  abstract class Feline implements Animal { abstract public void eat(); }  分别插入到第5行,有几个可以通过编译?() 

    • A、0
    • B、1
    • C、2
    • D、3

    正确答案:D

  • 第6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: A
    解析: 暂无解析

  • 第7题:

    单选题
    1. public class Exception Test {  2. class TestException extends Exception {}  3. public void runTest() throws TestException {}  4. public void test() /* Point X */ {  5. runTest();  6. }  7. }  At Point X on line 4, which code is necessary to make the code compile?()
    A

     No code is necessary.

    B

     throws Exception

    C

     catch ( Exception e )

    D

     throws RuntimeException

    E

     catch ( TestException e)


    正确答案: E
    解析: 暂无解析

  • 第8题:

    单选题
    1. class MyThread implements Runnable {  2. public void run() {  3. System.out.print("go ");  4. }  5.  6. public static void main(String [] args) {  7. // insert code here  8. t.start(); 9. }  10. }  和如下四句:  Thread t = new MyThread(); MyThread t = new MyThread();  Thread t = new Thread(new Thread());  Thread t = new Thread(new MyThread());  分别插入到第5行,有几个可以通过编译?()
    A

    0

    B

    1

    C

    2

    D

    3


    正确答案: A
    解析: 暂无解析

  • 第9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10题:

    单选题
    现有:  1. interface Animal {  2. void eat();  3. }  4.  5. // insert code here  6.  7. public class HouseCat extends Feline {  8. public void eat() { }  9. }   和五个声明:  abstract class Feline implements Animal { }  abstract class Feline implements Animal { void eat(); }  abstract class Feline implements Animal { public void eat(); }  abstract class Feline implements Animal { public void eat() { } }  abstract class Feline implements Animal { abstract public void eat(); }  分别插入到第5行,有几个可以通过编译?()
    A

    0

    B

    1

    C

    2

    D

    3


    正确答案: D
    解析: 暂无解析

  • 第11题:

    单选题
    1. public class enclosingone (  2. public class insideone{}  3. )  4. public class inertest(  5. public static void main (string[]args)(  6. enclosingone eo= new enclosingone ();  7. //insert code here  8. )  9. )    Which statement at line 7 constructs an instance of the inner class?()
    A

     InsideOnew ei= eo.new InsideOn();

    B

     Eo.InsideOne ei = eo.new InsideOne();

    C

     InsideOne ei = EnclosingOne.new InsideOne();

    D

     EnclosingOne.InsideOne ei = eo.new InsideOne();


    正确答案: C
    解析: 暂无解析

  • 第12题:

    多选题
    Class TestException  1. public class TestException extends Exception {  2. } Class a:  1. public class a {  2.  3. public String sayHello(String name) throws TestException {  4.  5. if(name == null) {  6. throw new TestException();  7. }  8.  9. return “Hello “+ name;  10. }  11.  12. }  A programmer wants to use this code in an application: 45. A a=new A();  46. System.out.println(a.sayHello(”John”));  Which two are true?()
    A

    Class a will not compile.

    B

    Line 46 can throw the unchecked exception TestException.

    C

    Line 45 can throw the unchecked exception TestException.

    D

    Line 46 will compile if the enclosing method throws a TestException.

    E

    Line 46 will compile if enclosed in a try block, where TestException is caught.


    正确答案: D,E
    解析: 暂无解析

  • 第13题:

    1. public class A {  2. void A() {  3. System.out.println(“Class A”);  4. }  5. public static void main(String[] args) {  6. new A();  7. }  8. }  What is the result?()  

    • A、 Class A
    • B、 Compilation fails.
    • C、 An exception is thrown at line 2.
    • D、 An exception is thrown at line 6.
    • E、 The code executes with no output.

    正确答案:E

  • 第14题:

    1. public class Exception Test {  2. class TestException extends Exception {}  3. public void runTest() throws TestException {}  4. public void test() /* Point X */ {  5. runTest();  6. }  7. }  At Point X on line 4, which code is necessary to make the code compile?()  

    • A、 No code is necessary.
    • B、 throws Exception
    • C、 catch ( Exception e )
    • D、 throws RuntimeException
    • E、 catch ( TestException e)

    正确答案:B

  • 第15题:

    1. public class Test { 2. public static String output =””; 3.  4. public static void foo(int i) { 5. try { 6. if(i==1) { 7. throw new Exception(); 8. } 9. output += “1”; 10. } 11. catch(Exception e) { 12. output += “2”; 13. return; 14. } 15. finally { 16. output += “3”;17. } 18. output += “4”; 19. } 20.  21. public static void main(String args[]) { 22. foo(0); 23. foo(1); 24.  25. }26. } What is the value of the variable output at line 23?()


    正确答案:13423

  • 第16题:

    1. public class enclosingone (  2. public class insideone{}  3. )  4. public class inertest(  5. public static void main (string[]args)(  6. enclosingone eo= new enclosingone ();  7. //insert code here  8. )  9. )    Which statement at line 7 constructs an instance of the inner class?()  

    • A、 InsideOnew ei= eo.new InsideOn();
    • B、 Eo.InsideOne ei = eo.new InsideOne();
    • C、 InsideOne ei = EnclosingOne.new InsideOne();
    • D、 EnclosingOne.InsideOne ei = eo.new InsideOne();

    正确答案:D

  • 第17题:

    1. class Exc0 extends Exception { }  2. class Exc1 extends Exc0 { }  3. public class Test {  4. public static void main(String args[]) {  5. try {  6. throw new Exc1();  7. } catch (Exc0 e0) {  8. System.out.println(“Ex0 caught”);  9. } catch (Exception e) {  10. System.out.println(“exception caught”);  11. }  12. }  13. }  What is the result?()  

    • A、 Ex0 caught
    • B、 exception caught
    • C、 Compilation fails because of an error at line 2.
    • D、 Compilation fails because of an error at line 6.

    正确答案:A

  • 第18题:

    单选题
    1. public interface A {  2. public void doSomething(String thing);  3. }  1. public class AImpl implements A {  2. public void doSomething(String msg) { }  3. }  1. public class B {  2. public A doit() {  3. // more code here  4. }  5.  6. public String execute() { 7. // more code here  8. }  9. }  1. public class C extends B {  2. public AImpl doit() {  3. // more code here  4. }  5.  6. public Object execute() {  7. // more code here  8. }  9. }  Which statement is true about the classes and interfaces in the exhibit?()
    A

     Compilation will succeed for all classes and interfaces.

    B

     Compilation of class C will fail because of an error in line 2.

    C

     Compilation of class C will fail because of an error in line 6.

    D

     Compilation of class AImpl will fail because of an error in line 2.


    正确答案: A
    解析: 暂无解析

  • 第19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: D
    解析: 暂无解析

  • 第20题:

    单选题
    What is wrong with the following code?()   class MyException extends Exception {}   public class Qb4ab {   public void foo() {  try {  bar();  } finally {  baz();   } catch (MyException e) {}  }   public void bar() throws MyException {   throw new MyException();  }   public void baz() throws RuntimeException {   throw new RuntimeException();   }   }
    A

    Since the method foo() does not catch the exception generated by the method baz(), it must      declare the RuntimeException in its throws clause.

    B

    A try block cannot be followed by both a catch and a finally block.

    C

    An empty catch block is not allowed.

    D

    A catch block cannot follow a finally block.

    E

    A finally block must always follow one or more catch blocks.


    正确答案: B
    解析: 暂无解析

  • 第21题:

    多选题
    1. public class A {  2. public void method1() {  3. B b=new B();  4. b.method2();  5. // more code here  6. }  7. }  1. public class B {  2. public void method2() {  3.C c=new C();  4. c.method3();  5. // more code here  6. }  7. }  1. public class C {  2. public void method3() {  3. // more code here  4. }  5. }  Given:  25. try {  26. A a=new A();  27. a.method1();  28. } catch (Exception e) {  29. System.out.print(”an error occurred”);  30. }  Which two 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 code on line 5 of class B will execute.

    E

    The exception will be propagated back to line 27.


    正确答案: D,C
    解析: 暂无解析

  • 第22题:

    单选题
    Given classes defined in two different files:  1. package util;  2. public class BitUtils {  3. public static void process(byte[]) { /* more code here */ }  4. }  1. package app;  2. public class SomeApp {  3. public static void main(String[] args) {  4. byte[] bytes = new byte[256];  5. // insert code here  6. }  7. }  What is required at line 5 in class SomeApp to use the process method of BitUtils?()
    A

     process(bytes);

    B

     BitUtils.process(bytes);

    C

     util.BitUtils.process(bytes);

    D

     SomeApp cannot use methods in BitUtils.

    E

     import util.BitUtils.*; process(bytes);


    正确答案: E
    解析: 暂无解析

  • 第23题:

    单选题
    1. public class A {  2. void A() {  3. System.out.println(“Class A”);  4. }  5. public static void main(String[] args) {  6. new A();  7. }  8. }  What is the result?()
    A

     Class A

    B

     Compilation fails.

    C

     An exception is thrown at line 2.

    D

     An exception is thrown at line 6.

    E

     The code executes with no output.


    正确答案: E
    解析: 暂无解析