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+// The Exception for BigInt %0Apublic class BigIntFormatException extends RuntimeException %7B%0A%09public BigIntFormatException(String s) %7B%0A%09%09super(s);%0A%09%7D%0A%09public BigIntFormatException()%7B%0A%09%09this(%22Please try again! You may have wrong format form.%22);%0A%09%7D%0A%7D%0A

Create BigIntFormatException.java