Compilation fails.
Compilation succeeds with errors.
Compilation succeeds with warnings.
Compilation succeeds without warnings or errors.
第1题:
class A { public String toString () { return “4”; } } class B extends A { 8. public String toString () { return super.toString() + “3”; } } public class Test { public static void main(Stringargs) { System.out.printIn(new B()); } } What is the result?()
第2题:
class A { public A() { System.out.println(“hello from a”); } } class B extends A { public B () { System.out.println(“hello from b”); super(); } } public class Test { public static void main(String args[]) { A a = new B(); } } What is the result when main is executed?()
第3题:
class A
{public int getNumber(int a){return a+1;}}
class B extends A
{public int getNumber(int a, char c){return a+2;}public static void main(String[] args){B b=new B();System.out.println(b.getNumber(0));}}
what is the result?()
A.compilation succeeds and 1 is printed
B.compilation succeeds and 2 is printed
C.compilation succeeds and 3 is printed
D.An error at this program cause compilation to fail
第4题:
public class Test { public static void main( String[] args) { String foo = args[1]; String bar = args[2]; String baz = args[3]; System.out.println(“baz = “ + baz); } } And the command line invocation: java Test red green blue What is the result?()
第5题:
public class Test { public static void main(String[] args) { String str = NULL; System.out.println(str); } } What is the result?()
第6题:
public class Test { public static void main(String [] args) { boolean assert = true; if(assert) { System.out.println(”assert is true”); } } } Given: javac -source 1.3 Test.java What is the result?()
第7题:
public class Alpha{ public static void main( string[] args ){ if ( args.length == 2 ) { if ( args.[0].equalsIgnoreCase(“-b”) ) System.out.println( new Boolean( args[1] )); } } } And the code is invoked by using the command: java Alpha –b TRUE What is the result?()
第8题:
A.Compilationfails.
B.Compilationsucceedswitherrors.
C.Compilationsucceedswithwarnings.
D.Compilationsucceedswithoutwarningsorerrors.
第9题:
public class Test { public static void aMethod() throws Exception { try { throw new Exception(); } finally { System.out.println(“finally”); } } public static void main(String args[]) { try { aMethod(); } catch (Exception e) { System.out.println(“exception”); } System.out.println(“finished”); } } What is the result?()
第10题:
11. public class Test { 12. public void foo() { 13. assert false; 14. assert false; 15. } 16. public void bar(){ 17. while(true){ 18. assert false; 19. } 20. assert false; 21. } 22. } What causes compilation to fail?()