• 2022-05-31
    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.
  • D

    内容

    • 0

      11. String test = “Test A. Test B. Test C.”; 12. // insert code here 13. String[] result = test.split(regex); Which regular expression inserted at line 12 will correctly split 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*”; F: String regex = “\\w[ \.] +“;

    • 1

      11. String test = “Test A. Test B. Test C.”;  12. // insert code here  13. String[] result = test.split(regex);  Which regular expression inserted at line 12 will correctly split 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*”; F:  String regex = “\\w[ \.] +“;

    • 2

      String a = “ABCD”;  String b = a.toLowerCase();  b.replace(‘a’, ‘d’);  b.replace(‘b’, ‘c’);  System.out.println(b);   What is the result? () A:  abcd B:  ABCD C:  dccd D:  dcba E:  Compilation fails. F:  An exception is thrown at runtime.

    • 3

      System.out.println(Math.sqrt(-4D));  What is the result?() A:  –2 B:  NaN C:  Infinity D:  Compilation fails. E:  An exception is thrown at runtime.

    • 4

      Given classes defined in two different files: What is the result of executing XMLMessage.main?() A: text B: Compilation fails. C: <msg>text</msg> D: An exception is thrown at runtime.