试述abstract class和interface有什么区别?
public class enclosingone ( public class insideone{} ) public class inertest( public static void main (stringargs)( enclosingone eo= new enclosingone (); //insert code here ) ) Which statement at line 7 constructs an instance of the inner class?()
If you want to learn something, you had better pay()in class.
Given: If an instance of class Beagle is created,then Serialized,then deSerialized, what is the result?()
10. public class ClassA { 11. public void count(int i) { 12. count(++i); 13. } 14. } And: 20. ClassA a = new ClassA(); 21. a.count(3); Which exception or error should be thrown by the virtual machine?()
Fire extinguishing agents used on Class C fires must be().
10. class Foo { 11. static void alpha() { /* more code here */ } 12. void beta() { /* more code here */ } 13. } Which two are true?()
public class ForBar { public static void main(String args) { int i = 0, j = 5; tp: for (;;) { i ++; for(;;) if(i > --j) break tp; } system.out.printIn(“i = ” + i + “, j = “+ j); } } What is the result? ()
package com.company.application; public class MainClass{ public static void main(String[]args){} } And Main Class exists in the/apps/com/company/application directory.Assume the CLASSPATH environment variable is set to“.”(currentdirectory).Which two java commands entered at the command line will run MainClass()
1. class A implements runable ( 2. int i; 3. public void run () ( 4. try ( 5. thread.sleep(5000); 6. i= 10; 7. ) catch(InterruptedException e) {} 8. ) 9. ) 10. 11. public class Test { 12. public static void main (string args) ( 13. try ( 14. A a = new A (); 15. Thread t = new Thread (a); 16. t.start(); 17. 18. int j= a.i; 19. 20. ) catch (Exception e) {} 21. ) 22. ) Which statement al line 17 will ensure that j=10 at line 19?()