A big integer input in java

Question

Possible Duplicate:
Large Numbers in Java

I need to take and manipulate an integer input with <= 500 digits. How can it be done in java? Any help would be appreciated.

score 2 · Accepted Answer · answered Sep 30 '12 at 06:40

2

The BigInteger class is a good place to start for big ints.

I'll have to check the documentation to see what the upper bound on BigInteger is, but it should suit your needs.

answered Sep 30 '12 at 06:40

asteri

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No, actually the input data constraint is <=500 digit. My program works fine as long as it is within the limits of a long, but beyond that, I didn't know what to do. – Victor Mukherjee Sep 30 '12 at 06:43
Gotcha. :) Sorry, it just seemed odd to give an upper bound instead of a lower bound when talking about big numbers I guess. – asteri Sep 30 '12 at 06:44

score 2 · Answer 2 · edited Sep 30 '12 at 06:44

2

import java.math.BigInteger;
public class BigIntegerExample 
{
    public static void main(String[] args) 
    {
       BigInteger bigInteger1 = new BigInteger ("123456789");
       BigInteger bigInteger2 = new BigInteger ("112334");
       BigInteger bigIntResult = bigInteger1.multiply(bigInteger2); 
       System.out.println("Result is  ==> " + bigIntResult);
    }
}

You can take as long value in integer using Biginteger class.

edited Sep 30 '12 at 06:44

Michael Petrotta

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answered Sep 30 '12 at 06:43

Abhishekkumar

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Take more care with your indentation please, Abhishekkumar. – Michael Petrotta Sep 30 '12 at 06:45
Thanks sir i will keep in mind this thing in future. – Abhishekkumar Sep 30 '12 at 06:46

A big integer input in java

2 Answers2