compare two numeric String values

Question

I have a simple doubt. Would be great if anyone helps me.

I have two strings:

String string1 = "4"; // and 
String string2 = "04";

Both the values are equal but how to compare them in java? We have equals and equalsIgnoreCase for comparing String alpha values, similarly how to compare numeric values.

Answer 1

Don't forget the BigInteger for very long values.

return new BigInteger(s1).compareTo(new BigInteger(s2));

Answer 2

Use the Integer class to convert the strings to integers.

http://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html#parseInt%28java.lang.String%29

Integer.parseInt(string1) == Integer.parseInt(string2)