remove_bad_code.java

try(FileInputStream is = new FileInputStream("bla/bla/src/main/java/FooBarBad.java")) {
    CompilationUnit cu = JavaParser.parse(is);
    (new VoidVisitorAdapter() {
        @Override
        public void visit(final FieldDeclaration f, Object arg) {
            super.visit(f, arg);
            (new VoidVisitorAdapter() {
                @Override
                public void visit(VariableDeclaratorId v, Object arg) {
                    super.visit(v, arg);
                    System.out.printf("%s: %s >> remove code: %s\n", f.getType(), v.getName(), f.getRange());
                }
            }).visit(f, null);
        }
    }).visit(cu, null);
}

/*
double: foo >> remove code: (line 2,col 5)-(line 2,col 23)
int: bar >> remove code: (line 3,col 5)-(line 3,col 20)
String: bad >> remove code: (line 4,col 5)-(line 4,col 23)
*/