单选题foo and bar are public references available to many other threads. foo refers to a Thread and bar is an Object. The thread foo is currently executing bar.wait(). From another thread, which statement is the most reliable way to ensue that foo will stop executing wait()?A foo.notify();B bar.notify();C foo.notifyAll();D Thread.notify();E bar.notiFYAll();F Object.notify();

单选题
foo and bar are public references available to many other threads. foo refers to a Thread and bar is an Object. The thread foo is currently executing bar.wait(). From another thread, which statement is the most reliable way to ensue that foo will stop executing wait()?
A

 foo.notify();

B

 bar.notify();

C

 foo.notifyAll();

D

 Thread.notify();

E

 bar.notiFYAll();

F

 Object.notify();


参考解析

解析: 暂无解析

相关考题:

Giventhefully-qualifiedclassnames:com.foo.bar.Dogcom.foo.bar.blatz.Bookcom.bar.Carcom.bar.blatz.SunWhichgraphrepresentsthecorrectdirectorystructureforaJARfilefromwhichthoseclassescanbeusedbythecompilerandJYM?()A.JarAB.JarBC.JarCD.JarDE.JarE

Given: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.new Foo() { public int bar() { return 1; }D.new class Foo { public int bar() { return 1; }

11. public void addStrings(List list) {  12. list.add(”foo”);  13. list.add(”bar”);  14. }  What must you change in this method to compile without warnings?() A、 add this code after line 11: list = (List) list;B、 change lines 12 and 13 to: list.add(”foo”); list.add(”bar”);C、 change the method signature on line 11 to: public void addStrings(List extends String list) {D、 change the method signature on line 11 to: public void addStrings(List super String list) {E、 No changes are necessary. This method compiles without warnings.

public class Test {   public static void main (String args) {  string foo = “blue”;  string bar = foo;   foo = “green”;   System.out.printIn(bar);   }   }   What is the result?()  A、 An exception is thrown.B、 The code will not compile.C、 The program prints “null”D、 The program prints “blue”E、 The program prints “green”

public class Base {  public static final String FOO = “foo”;  public static void main(String[] args) {  Base b = new Base();  Sub s = new Sub();  System.out.print(Base.FOO);  System.out.print(Sub.FOO);  System.out.print(b.FOO);  System.out.print(s.FOO);  System.out.print(((Base)s).FOO);  } }  class Sub extends Base {public static final String FOO=bar;}  What is the result?() A、 foofoofoofoofooB、 foobarfoobarbarC、 foobarfoofoofooD、 foobarfoobarfooE、 barbarbarbarbarF、 foofoofoobarbarG、 foofoofoobarfoo

package foo; public class Outer (  public static class Inner (  )  )   Which statement is true? () A、 An instance of the Inner class can be constructed with “new Outer.Inner ()”B、 An instance of the inner class cannot be constructed outside of package foo.C、 An instance of the inner class can only be constructed from within the outer class.D、 From within the package bar, an instance of the inner class can be constructed with “new inner()”

You have read/write permission on an ordinary file foo. You have just run In foo bar. What would happen if you ran rm foo?()A、 foo and bar would both be removed.B、 foo would be removed while bar would remain accessible.C、 foo would be removed, bar would still exist but would be unusable.D、 Both foo and bar would remain accessible.E、 You would be asked whether bar should be removed.

Which code determines the int value foo closest to a double value bar?()  A、 Int foo = (int) Math.max(bar);B、 Int foo = (int) Math.min(bar);C、 Int foo = (int) Math.abs(bar);D、 Int foo = (int) Math.ceil(bar);E、 Int foo = (int) Math.floor(bar);F、 Int foo = (int) Math.round(bar);

class One {   public One foo() { return this; }  }  class Two extends One {  public One foo() { return this; }  }  class Three extends Two {   // insert method here  }  Which two methods, inserted individually, correctly complete the Three class?()A、 public void foo() { }B、 public int foo() { return 3; }C、 public Two foo() { return this; }D、 public One foo() { return this; }E、 public Object foo() { return this; }

Given:  foo and bar are public references available to many other threads, foo refers to a Thread and bar is an Object. The thread foo is currently executing bar.wait().  From another thread, what provides the most reliable way to ensure that foo will stop executing wait()?()A、foo.notify();B、bar.notify();C、foo.notifyAll();D、Thread.notify();E、bar.notifyAll();F、Object.notify();

Which statements concerning the relationships between the following classes are true?()   class Foo {  int num;   Baz comp = new Baz();   }   class Bar {  boolean flag;   }   class Baz extends Foo {   Bar thing = new Bar();   double limit;   }  A、A Bar is a Baz.B、A Foo has a Bar.C、A Baz is a Foo.D、A Foo is a Baz.E、A Baz has a Bar.

String foo = “blue”;  Boolean[]bar = new Boolean [1];  if (bar[0])  {  foo = “green”;  }   What is the result? () A、 Foo has the value of “”B、 Foo has the value of null.C、 Foo has the value of “blue”D、 Foo has the value of “green”E、 An exception is thrown.F、 The code will not compile.

Given the JSP code: % request.setAttribute("foo", "bar"); %and the Classic tag handler code: 5. public int doStartTag() throws JspException { 6. // insert code here 7. // return int 8. } Assume there are no other "foo" attributes in the web application. Which invocation on the pageContextobject,inserted at line 6,assigns "bar" to the variable x?()A、String x = (String) pageContext.getAttribute("foo")B、String x = (String) pageContext.getRequestScope("foo")C、It is NOT possible to access the pageContext object from within doStartTagD、String x = (String) pageContext.getRequest().getAttribute("foo")E、String x = (String) pageContext.getAttribute("foo", PageContext.ANY_SCOPE)

public class Foo {  public int a;  public Foo() { a = 3; }  public void addFive() { a += 5; }  }  and:  public class Bar extends Foo { public int a;  public Bar() { a = 8; }  public void addFive() { this.a +=5; }  }  invoked with:  Foo foo = new Bar();  foo.addFive();  System.out.println(”Value: “+ foo.a);  What is the result?() A、 Value: 3B、 Value: 8C、 Value: 13D、 Compilation fails.E、 The code runs with no output.F、 An exception is thrown at runtime.

Given: foo and bar are public references available to many other threads. foo refers to a Thread and bar is anObject.  The thread foo is currently executing bar.wait().  From another thread,what provides the most reliable wayto ensure that foo will stop executing wait()?A、foo.notify();B、bar.notify();C、foo.notifyAll();D、Thread.notify();E、bar.notifyAll();

单选题public class Foo {  public int a;  public Foo() { a = 3; }  public void addFive() { a += 5; }  }  and:  public class Bar extends Foo { public int a;  public Bar() { a = 8; }  public void addFive() { this.a +=5; }  }  invoked with:  Foo foo = new Bar();  foo.addFive();  System.out.println(”Value: “+ foo.a);  What is the result?()A Value: 3B Value: 8C Value: 13D Compilation fails.E The code runs with no output.F An exception is thrown at runtime.

多选题10. interface Foo {  11. int bar();  12. }  13.  14. public class Beta {  15.  16. class A implements Foo {  17. public int bar() { return 1; }  18. }  19.  20. public int fubar( Foo foo) { return foo.bar(); }  21.  22. public void testFoo() {  23.  24. class A implements Foo {  25. public int bar() { return 2; }  26. }  27.  28. System.out.println( fubar( new A())); 29. }  30.  31. public static void main( String[] argv) {  32. new Beta().testFoo();  33. }  34. }  Which three statements are true?()ACompilation fails.BThe code compiles and the output is 2.CIf lines 16, 17 and 18 were removed, compilation would fail.DIf lines 24, 25 and 26 were removed, compilation would fail.EIf lines 16, 17 and 18 were removed, the code would compile and the output would be 2.FIf lines 24, 25 and 26 were removed, the code would compile and the output would be 1.

多选题Which statements concerning the relationships between the following classes are true?()   class Foo {  int num;   Baz comp = new Baz();   }   class Bar {  boolean flag;   }   class Baz extends Foo {   Bar thing = new Bar();   double limit;   }AA Bar is a Baz.BA Foo has a Bar.CA Baz is a Foo.DA Foo is a Baz.EA Baz has a Bar.

单选题Which code determines the int value foo closest to, but not greater than, a double value bar?()A Int foo = (int) Math.max(bar);B Int foo = (int) Math.min(bar);C Int foo = (int) Math.abs(bar);D Int foo = (int) Math.ceil(bar);E Int foo = (int) Math.floor(bar);F Int foo = (int) Math.round(bar);

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; } }

单选题public class Test {  public static void main (String [] args)  {  string foo = “blue”;  string bar = foo;  foo = “green”;  System.out.printIn(bar);  }  }   What is the result?()A An exception is thrown.B The code will not compile.C The program prints “null”D The program prints “blue”E The program prints “green”

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();   }   }ASince the method foo() does not catch the exception generated by the method baz(), it must declare the RuntimeException in its throws clause.BA try block cannot be followed by both a catch and a finally block.CAn empty catch block is not allowed.DA catch block cannot follow a finally block.EA finally block must always follow one or more catch blocks.

单选题You have read/write permission on an ordinary file foo. You have just run In foo bar. What would happen if you ran rm foo?()A foo and bar would both be removed.B foo would be removed while bar would remain accessible.C foo would be removed, bar would still exist but would be unusable.D Both foo and bar would remain accessible.E You would be asked whether bar should be removed.

单选题Given:  foo and bar are public references available to many other threads, foo refers to a Thread and bar is an Object. The thread foo is currently executing bar.wait().  From another thread, what provides the most reliable way to ensure that foo will stop executing wait()?()Afoo.notify();Bbar.notify();Cfoo.notifyAll();DThread.notify();Ebar.notifyAll();FObject.notify();

单选题Given: foo and bar are public references available to many other threads. foo refers to a Thread and bar is anObject.  The thread foo is currently executing bar.wait().  From another thread,what provides the most reliable wayto ensure that foo will stop executing wait()?Afoo.notify();Bbar.notify();Cfoo.notifyAll();DThread.notify();Ebar.notifyAll();

单选题foo and bar are public references available to many other threads. foo refers to a Thread and bar is an Object. The thread foo is currently executing bar.wait(). From another thread, which statement is the most reliable way to ensue that foo will stop executing wait()?A foo.notify();B bar.notify();C foo.notifyAll();D Thread.notify();E bar.notiFYAll();F Object.notify();

单选题public class Base {  public static final String FOO = “foo”;  public static void main(String[] args) {  Base b = new Base();  Sub s = new Sub();  System.out.print(Base.FOO);  System.out.print(Sub.FOO);  System.out.print(b.FOO);  System.out.print(s.FOO);  System.out.print(((Base)s).FOO);  } }  class Sub extends Base {public static final String FOO=bar;}  What is the result?()A foofoofoofoofooB foobarfoobarbarC foobarfoofoofooD foobarfoobarfooE barbarbarbarbarF foofoofoobarbarG foofoofoobarfoo

单选题Given the JSP code: and the Classic tag handler code: 5. public int doStartTag() throws JspException { 6. // insert code here 7. // return int 8. } Assume there are no other "foo" attributes in the web application. Which invocation on the pageContextobject,inserted at line 6,assigns "bar" to the variable x?()AString x = (String) pageContext.getAttribute(foo)BString x = (String) pageContext.getRequestScope(foo)CIt is NOT possible to access the pageContext object from within doStartTagDString x = (String) pageContext.getRequest().getAttribute(foo)EString x = (String) pageContext.getAttribute(foo, PageContext.ANY_SCOPE)