Regexp does not remove zeros at the beginning

[TarasOsiris]

    private String extractAppIdFromAppKey(String appId) {
        // take the second half of the 40 characters
        String working = appId.substring(20);

        // this removes leading 0's
        working = working.replaceFirst("^0+(?!$)", "");
        return working;
    }

This is the method that removes zeros from the beginning of the string, in Objective C it does not.

1) testAppIdExactly40SymbolsAndZerosInTheMiddle(im.getsocial.sdk.core.AppIdTest)
java.lang.AssertionError: 
Expected: "103456789"
     but: was "0103456789"

Version j2objc-0.9.8.2.1