large numbers in java

/**
 * @author lautturi.com 
 * Java example: larger number in java than long
 */

import java.math.BigInteger;
import java.util.*;

public class Lautturi {
	public static void main(String[] args) {
		BigInteger reallyBig = new BigInteger("1234567890123456890");
		BigInteger notSoBig = new BigInteger("2743561234");
		reallyBig = reallyBig.add(notSoBig);
		System.out.println(notSoBig);
		System.out.println(reallyBig);
	}
}

output:

2743561234
1234567892867018124