@@ -0,0 +1,598 @@
+package musician101.common.java.util;%0A%0Apublic class Utils%0A%7B%0A    public boolean isInteger(String string)%0A    %7B%0A        if (string == null)%0A            return false;%0A%0A        int length = string.length();%0A        if (length == 0)%0A            return false;%0A%0A        int i = 0;%0A        if (string.charAt(0) == '-')%0A        %7B%0A            if (length == 1)%0A                return false;%0A%0A            i = 1;%0A        %7D%0A%0A        for (; i %3C length; i++)%0A        %7B%0A            char c = string.charAt(i);%0A            if (c %3C '0' %7C%7C c %3E '9')%0A                return false;%0A        %7D%0A%0A        return true;%0A    %7D%0A%7D%0A

Create general utility class.