building a parser for BNF representation of java

need a  bison (yacc) to generate a parser (syntax checker) for a subset of the BNF representation of Java , subset should include specifications of: while, do and forstatements, if and if else statements. For the expressions, use arithmetic expressions and operators.and also need example Java code (4 conforming examples) to show the capabilities of the parser for checking the constructs  implemented. Add (2) examples where an error is detectedans also 6 examples with Java code as inputs, running through the parser, and output.