TIOBE - Java Coding Standard

Rule: StringandStringBuffer13

Synopsis:	Do not instantiate a StringBuffer with a char
Language:	Java
Severity Level:	2
Category:	StringandStringBuffer

Description:

StringBuffer sb = new StringBuffer('c'); The char will be converted into int to intialize StringBuffer size.

class Foo {
  StringBuffer sb1 = new StringBuffer('c'); //Bad
  StringBuffer sb2 = new StringBuffer("c"); //Better
}