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?()
A. True
B. Not true
C. An exception is thrown at runtime.
D. Compilation fails because of an error at line 12.
E. Compilation fails because of an error at line 19.
相关考题
-
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?()
A. collie
B. harrier
C. Compilation fails.
D. collie harrier
E. An exception is thrown at runtime. -
单项选择题
public class Test { public enum Dogs {collie, harrier, shepherd}; public static void main(String [] args) { Dogs myDog = Dogs.shepherd; switch (myDog) { case collie: System.out.print(”collie “); case default: System.out.print(”retriever “); case harrier: System.out.print(”harrier “); } } } What is the result?()
A. harrier
B. shepherd
C. retriever
D. Compilation fails.
E. retriever harrier
F. An exception is thrown at runtime. -
单项选择题
public class Bootchy { int bootch; String snootch; public Bootchy() { this(”snootchy”); System.out.print(”first “); } public Bootchy(String snootch) { this(420, “snootchy”); System.out.print(”second “); } public Bootchy(int bootch, String snootch) { this.bootch = bootch; this.snootch = snootch; System.out.print(”third “); } public static void main(String[] args) { Bootchy b = new Bootchy(); System.out.print(b.snootch +“ “ + b.bootch); } } What is the result?()
A. snootchy 420 third second first
B. snootchy 420 first second third
C. first second third snootchy 420
D. third second first siiootchy 420
E. third first second snootchy 420
F. first second first third snootchy 420
