171. Given:

 11. String test = "a1b2c3"； 

12. String[] tokens = test.split("\d")； 

13. for(String s : tokens) System.out.print(s + " ")；

 What is the result?
(A) a b c
(B) 1 2 3
(C) a1b2c3
(D) a1 b2 c3
(E) Compilation fails.

166. Given: 1. public class BuildStuff{ 2. public static void main(String[] args){ 3. Boolean test = new Boolean(true)； 4. Integer x = 343； 5. Integer y = new BuildStuff().go(test, x)； 6. System.out.println(y)； 7. } 8. int go(Boolean b, int i){ 9. if(b) return (i/7)； 10. return (i/49)； 11. } 12. } What is the result? (A) 7 (B) 49 (C) 343 (D) Compilation fails. (E) An exception is thrown at runtime.

167. Given: 11. String test = "Test A. Test B.Test C."； 12. //insert code here 34  13. String[] result = test.split(regex)； Which regular expression, inserted at line 12, correctly splits test into "Test A", "Test B", and "Test C"? (A) String regex = ""； (B) String regex = " "； (C) String regex = ".*"； (D) String regex = "\s"； (E) String regex = "\.\s*"；

168. Given: 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.

170. Given: 12. String csv = "Sue,5,true,3"； 13. Scanner scanner = new Scanner(csv)； 14. scanner.useDelimiter(",")； 15. int age = scanner.nextInt(), What is the result? (A) Compilation fails. (B) After line 15, the value of age is 5. (C) After line 15, the value of age is 3. (D) An exception is thrown at runtime.

172. Given: 33. Date d = new Date(0)； 34. String ds = "December 15, 2004"； 35. //insert code here 36. try{ 37. d = df.parse(ds)； 38. } 39. catch(ParseException e){ 40. System.out.println("Unable to parse " + ds)； 41. } 42. //insert code here too What creates the appropriate DateFormat object and adds a day to the Date object? (A) 35. DateFormat df = DateFormat.getDateFormat()； 42. d.setTime((60 * 60 * 24) + d.getTime()； (B) 35. DateFormat df = DateFormat.getDateInstance()； 42. d.setTime((1000 * 60 * 60 * 24) + d.getTime())； (C) 35. DateFormat df = DateFormat.getDateFormat()； 42. d.setLocalTime((1000 * 60 * 60 * 24) + d.getLocalTime())； (D) 35. DateFormat df = DateFormat.getDateInstance()； 42. d.setLocalTime((60 * 60 * 24) + d.getLocalTime())；

173. Given: 11. public class Yikes{ 12. 13. public static void go(Long n){System.out.print("Long ")；} 14. public static void go(Short n){System. outprint("Short ")；} 15. public static void go(int n){System.out.print("int ")；} 16. public static void main(String[] args){ 17. short y = 6； 18. long z = 7； 19. go(y)； 20. go(z)； 21. } 22. } What is the result? (A) int Long (B) Short Long (C) Compilation fails. (D) An exception is thrown at runtime.

174. Given: 12. Date date = new Date()； 13. df.setLocale(Locale.ITALY)； 14. String s = df.format(date)； The variable df is an object of type DateFormat that has been initialized in line 11. What is the result if this code is run on December 14, 2000? (A) The value of s is 14-dic-2000. (B) The value of s is Dec 14, 2000. (C) An exception is thrown at runtime. (D) Compilation fails because of an error in line 13.

複選題175. Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object? (Choose two.) (A) When using versions of Java technology earlier than 5.0. (B) When sharing a StringBuffer among multiple threads. (C) When using the java.io class StringBufferInputStream. (D) When you plan to reuse the StringBuffer to build more than one string. (E) Enitiation of separate design processes to the separation of users

177. Given: 11. String test = "This is a test"； 12. String[] tokens = test.split("s")； 13. System.out.println(tokens.length)； What is the result? (A) 0 (B) 1 (C) 4 (D) Compilation fails. (E) An exception is thrown at runtime.

178. Given: 1. public class Target{ 2. private int i = 0； 3. public int addOne(){ 4. return ++i； 5. } 6. } And: 1. public class Client{ 2. public static void main(String[] args){ 3. System.out.println(new Target().addOne())； 4. } 5. } Which change can you make to Target without affecting Client? (A) Line 4 of class Target can be changed to return i++； (B) Line 2 of class Target can be changed to private int i = 1； (C) Line 3 of class Target can be changed to private int addOne(){ (D) Line 2 of class Target can be changed to private Integer i = 0；