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单选题
public class Delta {  static boolean foo(char c) {  System.out.print(c);  return true;  }  public static void main( String[] argv ) {  int i =0;  for ( foo(‘A’); foo(‘B’)&&(i<2); foo(‘C’)){  i++ ;  foo(‘D’);  }  }  }  What is the result?()
A

 ABDCBDCB

B

 ABCDABCD

C

 Compilation fails.

D

 An exception is thrown at runtime.


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更多 “单选题public class Delta {  static boolean foo(char c) {  System.out.print(c);  return true;  }  public static void main( String[] argv ) {  int i =0;  for ( foo(‘A’); foo(‘B’)(i2); foo(‘C’)){  i++ ;  foo(‘D’);  }  }  }  What is the result?()A  ABDCBDCBB  ABCDABCDC  Compilation fails.D  An exception is thrown at runtime.” 相关考题
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考题 单选题10. interface Foo {}  11. class Alpha implements Foo {}  12. class Beta extends Alpha {}  13. class Delta extends Beta {  14. public static void main( String[] args) {  15. Beta x = new Beta();  16. // insert code here  17. }  18. }  Which code, inserted at line 16, will cause a java.lang.ClassCastException?()A  Alpha a = x;B  Foo f= (Delta)x;C  Foo f= (Alpha)x;D  Beta b = (Beta)(Alpha)x;

考题 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()”.

考题 单选题public class test (      private static int j = 0;  private static boolean methodB(int k) (  j += k;  return true;  )  public static void methodA(int  i)(  boolean b:     b = i  10 | methodB (4);  b = i  10 || methodB (8);  )  public static void main (String args[])(   methodA (0);  system.out.printIn(j);  )  )   What is the result?()A  The program prints “0”B  The program prints “4”C  The program prints “8”D  The program prints “12”E  The code does not complete.

考题 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.

考题 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

考题 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; }

考题 单选题public class Foo {  static int[] a;  static { a[0]=2; }  public static void main( String[] args) {}  }  Which exception or error will be thrown when a programmer attempts to run this code?()A  java.lang. StackOverflowErrorB  java.lang.IllegalStateExceptionC  java.lang.ExceptionlnlnitializerErrorD  java.lang.ArraylndexOutOfBoundsException