Java API ------ Boolean valueOf () method

Java API ------ Boolean valueOf () method

// Excerpt from ocjppublic void testIfA () {if (testIfB ("True") {System. out. println ("True");} else {System. out. println ("Not true") ;}} public Boolean testIfB (String str) {return Boolean. valueOf (str);} What is the result when method testIfA is invoked? A. trueB. not trueC. 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. answer:

Analysis:

View API:

// From the Jdk1.6.21 API -- Boolean class. Public static Boolean valueOf (String s) {return toBoolean (s )? TRUE: FALSE;} private static boolean toBoolean (String name) {return (name! = Null) & name. inclusignorecase ("true "));}

It is not hard to see that it is case insensitive.