Which of the following is not a wrapper class?

Boolean

i write boolean .. but answer is wrong .please tell me correct answer...

i wrote boolean but the answer is wrong please tell me the write answer

I wrote the answer as Boolean but i got it wrong

Ans. is A)String.

plz see http://www.ibiblio.org/obp/thinkCSjav/app01.htm

String is not a wrapper class

Integer

String class is not a wrapper class

Answer should be Character, it's not a data type even, check below examples.

String s=new String(); //compiling
Integer s=new Integer(); //compiling
Boolean s=new Boolean(false); //compiling

Character s=new Character(); // Never Compile.