How to fix “cannot find symbol error” for my program?

Question

I am struggling to find why I keep receiving this message:

Integer.java:13: error: cannot find symbol
         num = Integer.parseInt(numStr);
                           


        

Answer 1

You should rename your class to another name, perhaps call it "IntegerMachine" and not "Integer". Java already has a native class with the name "Integer", and by naming your own class the same would mean that instead of calling java.lang.Integer.parseInt(string), which you intended, you are calling .Integer.parseInt(), for which the latter does not exist.