第177題

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.

答案：D
參考：11-5 規則運算式與相關類別