OCJP_题库详解OCJP_题库详解.doc

幻灯片1 SCJP 6.0 Albert Chu 幻灯片2 001 AD 35. String #name = Jane Doe; 36. int $age = 24; 37. Double _height = 123.5; 38. double ~temp = 37.5; Which two statements are true? (Choose two.) A. Line 35 will not compile. B. Line 36 will not compile. C. Line 37 will not compile. D. Line 38 will not compile. 幻灯片3 002 D 1. public class TestString1{ 2. public static void main(String[ ] args){ 3. String str = 420; 4. str += 42; 5. System.out.print(str); 6. } 7. } What is the output? A. 42 B. 420 C. 462 D. 42042 E. Compilation fails. F. An exception is thrown at runtime. 幻灯片4 003 D 1. public class Test{ 2. public static void main(String[ ] args){ 3. int x = 5; 4. boolean b1 = true; 5. boolean b2 = false; 6. 7. if((x==4) !b2) 8. System.out.print(1 ); 9. System.out.print(2 ); 10. if((b2=true) b1) 11. System.out.print(3 ); 12. } 13. } What is the result? A. 2 B. 3 C. 1 2 D. 2 3 E. 1 2 3 F. Compilation fails. G. An exception is thrown at runtime. 幻灯片5 004 C 22. public void go(){ 23. String o = ; 24. z: 25. for(int x=0; x3; x++){ 26. for(int y=0; y2; y++){ 27. if(x == 1) break; 28. if(x==2 y==1) break z; 29. o = o + x + y; 30. } 31. } 32. System.out.println(o); 33. } What is the result when the go() method is invoked? A. 00 B. 0001 C. 000120 D.E. Compilation fails. F. An exception is thrown at runtime. 幻灯片6 005 B 10. int x = 0; 11. int y = 10; 12. do{ 13. y--; 14. ++x; 15. }while(x 5); 16. System.out.print(x + , + y); What is the result? A. 5,6 B. 5,5 C. 6,5 D. 6,6 幻灯片7 006 G 1. public class Breaker{ 2. static String o = ; 3. public static void main(String[ ] args){ 4. z: 5. o = o + 2; 6. for(int x=3; x8; x++){ 7. if(x == 4) break; 8. if(x == 6) break z; 9. o = o + x; 10. } 11. System.out.println(o); 12. } 13. } What is the result? A. 23 B. 234 C. 235 D. 2345 E. 2357 F. 23457 G. Compilation fails. 幻灯片8 007 B 1. public class Breaker2{ 2. static String o = ; 3. publ