1. package foo; 2.  3. import java.util.Vector; 4.  5. protected class MyVector Vector { 6. init i = 1; 7. public MyVector() { 8. i = 2; 9. } 10. } 11.  12. public class MyNewVector extends MyVector { 13. public MyNewVector() { 14. i = 4; 15. } 16. public static void main(String args[]) { 17. MyVector v = new MyNewVector(); 18. } 19. } What is the result?()  A、 Compilation succeeds.B、 Compilation fails because of an error at line 5.C、 Compilation fails because of an error at line 6.D、 Compilation fails because of an error at line 14.E、 Compilation fails because of an error at line 17.

1. package foo; 2.  3. import java.util.Vector; 4.  5. protected class MyVector Vector { 6. init i = 1; 7. public MyVector() { 8. i = 2; 9. } 10. } 11.  12. public class MyNewVector extends MyVector { 13. public MyNewVector() { 14. i = 4; 15. } 16. public static void main(String args[]) { 17. MyVector v = new MyNewVector(); 18. } 19. } What is the result?()  

  • A、 Compilation succeeds.
  • B、 Compilation fails because of an error at line 5.
  • C、 Compilation fails because of an error at line 6.
  • D、 Compilation fails because of an error at line 14.
  • E、 Compilation fails because of an error at line 17.

相关考题:

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package com.sun.sjcp;public class Commander{public static void main(String[]args){//more code here}}Assume that the class fileis located in /foo/com/sun/sjcp/,the current directory is/foo/,and that the classpath contains.(current directory).Which command line correctly runs Commander?()A.java CommanderB.java com.sim.sjcp.CommanderC.java com/sun/sjcp/CommanderD.java-cpcom.sun.sjcp CommanderE.java-cpcom/sun/sjcp Commander

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Assume a tag handler extends TagSupport. Which is used within the tag handler to get an attribute “foo” that is in the application scope?()A、 pageContext.getAttribute(“foo”);B、 getPageContext().getAttribute(“foo”);C、 pageContext.getApplicationScope(“foo”);D、 pageContext.getAttribute(“foo”,pageContext.APPLICATION_SCOPE).getAttribute(“foo”);E、 getPageContext().getScope(pageContext.APPLICATION_SCOPE).getAttribute(“foo”);

Which the three are valid declarations of a float?()A、 float foo = -1;B、 float foo = 1.0;C、 float foo = 42el:D、 float foo = 2.02f:E、 float foo = 3.03d:

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()”

Given an EL function foo, in namespace func, that requires a long as a parameter and returns a Map,which two are valid invocations of function foo?()A、${func(1)}B、${foo:func(4)}C、${func:foo(2)}D、${foo(5):func}E、${func:foo("easy")}F、${func:foo("3").name}

class Foo {  private int x;  publicFoo(intx) {this.x=x; }  public void setX( int x) { this.x = x; }  public int getX() { return x; }  }   public class Gamma {  static Foo fooBar( Foo foo) {  foo = new Foo( 100);  return foo;  }  public static void main( String[] args) {  Foo foo = new Foo( 300);  System.out.print( foo.getX() + “-“);  Foo fooFoo = fooBar( foo);  System.out.print( foo.getX() + “-“);  System.out.print( fooFoo.getX() + “-“);  foo = fooBar( fooFoo);  System.out.print( foo.getX() + “-“);  System.out.prmt( fooFoo.getX());  }  }  What is the output of this program?()A、 300-100-100-100-100B、 300-300-100-100-100C、 300-300-300-100-100D、 300-300-300-300-100

Which three are valid declarations of a float? () A、 Float foo = -1;B、 Float foo = 1.0;C、 Float foo = 42e1;D、 Float foo = 2.02f;E、 Float foo = 3.03d;F、 Float foo = 0x0123;

foo对象有att属性,那么获取att属性的值,以下哪些做法是可以的?()A、foo.attB、foo(“att”)C、foo[“att”]D、foo{“att”}E、foo[“a”+“t”+“t”]

下面选项中哪一个是和$("#foo")等价的写法()。A、$(“foo#”)B、$(“foo”)C、$(“.foo”)D、jquery(“#foo”)

console.log(foo);varfoo="foo!";console.log(foo);执行上面代码,控制台会输出()。A、undefined undefinedB、foo! undefinedC、undefined foo!D、foo! fool!

1. class SuperFoo {  2. SuperFoo doStuff(int x) {  3. return new SuperFoo(); 4. }  5. }  6.  7. class Foo extends SuperFoo {  8. //insert code here  9. }   下面哪三项分别插入到第8行,可以编译?()A、int doStuff() { return 42; }B、int doStuff(int x) { return 42; }C、Foo doStuff(int x) { return new Foo(); }D、SuperFoo doStuff(int x) { return new Foo(); }

Given a correctly compiled class whose source code is:  package com.sun.sjcp;  public class Commander {  public static void main(String[] args) {  // more code here  }  }  Assume that the class file is located in /foo/com/sun/sjcp/, the current directory is /foo/, and that the classpath contains “.“ (current directory). Which command line correctly runs Commander?() A、 java CommanderB、 java com. sim. sjcp.CommanderC、 java com/sun/sjcp/CommanderD、 java -cp com.sun.sjcp CommanderE、 java -cp com/sun/sjcp Commander

String foo = “blue”;    Booleanbar = 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: 1.% int[] nums = {42,420,4200}; 2.request.setAttribute("foo", nums); % 3.${5 + 3 lt 6} 4.${requestScope[’foo’][0] ne 10 div 0} 5. ${10 div 0} What is the result?()A、True trueB、False trueC、False true 0D、True true InfinityE、False true Infinity

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单选题String foo = “blue”;    Booleanbar = 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.

单选题package com.sun.sjcp; public class Commander{ public static void main(String[]args){ //more code here } } Assume that the class fileis located in /foo/com/sun/sjcp/,the current directory is/foo/,and that the classpath contains“.“(current directory). Which command line correctly runs Commander?()Ajava CommanderBjava com.sim.sjcp.CommanderCjava com/sun/sjcp/CommanderDjava-cpcom.sun.sjcp CommanderEjava-cpcom/sun/sjcp Commander

多选题Which the three are valid declarations of a float?()Afloat foo = -1;Bfloat foo = 1.0;Cfloat foo = 42el:Dfloat foo = 2.02f:Efloat foo = 3.03d:

单选题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()”

单选题Given an EL function foo, in namespace func, that requires a long as a parameter and returns a Map, which two are valid invocations of function foo?()A ${func(1)}B ${foo:func(4)}C ${func:foo(2)}D ${foo(5):func}E ${func:foo(“easy”)}F ${func:foo(“3”).name}

单选题package foo;  public class Outer {  public static class Inner {  }  }   Which statement is true?()A Compilation fails.B An instance of the Inner class can be constructed with “new Outer.Inner()”.C An instance of the Inner class cannot be constructed outside of package foo.D An instance of the Inner class can be constructed only from within the Outer class.E From within the package foo, and instance of the Inner class can be constructed with “new Inner()”.

多选题Which three are valid declarations of a float? ()AFloat foo = -1;BFloat foo = 1.0;CFloat foo = 42e1;DFloat foo = 2.02f;EFloat foo = 3.03d;FFloat foo = 0x0123;

单选题Given a correctly compiled class whose source code is:  package com.sun.sjcp;  public class Commander {  public static void main(String[] args) {  // more code here  }  }  Assume that the class file is located in /foo/com/sun/sjcp/, the current directory is /foo/, and that the classpath contains “.“ (current directory). Which command line correctly runs Commander?()A java CommanderB java com. sim. sjcp.CommanderC java com/sun/sjcp/CommanderD java -cp com.sun.sjcp CommanderE java -cp com/sun/sjcp Commander

多选题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?()Apublic void foo() { }Bpublic int foo() { return 3; }Cpublic Two foo() { return this; }Dpublic One foo() { return this; }Epublic Object foo() { return this; }

单选题下面选项中哪一个是和$("#foo")等价的写法()。A$(“foo#”)B$(“foo”)C$(“.foo”)Djquery(“#foo”)