Create an ASTParser (CompilationUnit) for the JDT using a char[]

createParser

public CompilationUnit createParser(char[] contents) {
	
	// Create the ASTParser which will be a CompilationUnit
	ASTParser parser = ASTParser.newParser(AST.JLS4);
	parser.setKind(ASTParser.K_COMPILATION_UNIT);
	parser.setSource(contents);
	parser.setResolveBindings(true);
	CompilationUnit parse = (CompilationUnit) parser.createAST(null);
	
	return parse;
}