单项选择题
int x=0; int y 10; do { y--; ++x; } while (x < 5); System.out.print(x + “,“ + y); What is the result?()
A. 5,6 B. 5,5 C. 6,5 D. 6,6
Float pi = new Float(3.14f); if(pi>3) { System.out.pr...
Float pi = new Float(3.14f); if(pi>3) { System.out.print(”pi is bigger than 3. “); } else { System.out.print(”pi is not bigger than 3. “); } finally { System.out.println(”Have a nice day.”); } What is the result?()
A. Compilation fails. B. pi is bigger than 3. C. An exception occurs at runtime. D. pi is bigger than 3. Have a nice day. E. pi is not bigger than 3. Have a nice day.
public static void main(String[] args) { String str = ...
public static void main(String[] args) { String str = “null‟; if (str == null) { System.out.println(”null”); } else (str.length() == 0) { System.out.println(”zero”); } else { System.out.println(”some”); } } What is the result?()
A. null B. zero C. some D. Compilation fails. E. An exception is thrown at runtime.
11. public static void main(String[] args) { 12. Integ...
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?()
A. three B. other C. An exception is thrown at runtime. D. Compilation fails because of an error on line 12. E. Compilation fails because of an error on line 13. F. Compilation fails because of an error on line 15.