单项选择题
A. null
B. zero
C. some
D. Compilation fails.
E. An exception is thrown at runtime.
单项选择题 11. public static void main(String[] args) { 12. Integer i = uew Integer(1) + new Integer(2); 13. switch(i) { 14. case 3: System.out.println(”three”); break; 15. default: System.out.println(”other”); break; 16. } 17. } What is the result?()
单项选择题 11. public void testIfA() { 12. if(testIfB(”True”)) { 13. System.out.println(”True”); 14. } else { 15. System.out.println(”Not true”); 16. } 17. } 18. public Boolean testIfB(String str) { 19. return Boolean.valueOf(str); 20. } What is the result when method testIfA is invoked?()
单项选择题 public class Test { public enum Dogs {collie, harrier}; public static void main(String [] args) { Dogs myDog = Dogs.collie; switch (myDog) { case collie: System.out.print(”collie “); case harrier: System.out.print(”harrier “); } } } What is the result?()