This rule is defined by the following XPath expression:
//AllocationExpression/ClassOrInterfaceType [@Image='StringBuffer'] /../Arguments/ArgumentList/Expression/PrimaryExpression /PrimaryPrefix/ Literal [starts-with(@Image, "'")] [ends-with(@Image, "'")]
Example:
class Foo { StringBuffer sb1 = new StringBuffer('c'); //Bad StringBuffer sb2 = new StringBuffer("c"); //Better }