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[QUOTE="Martin York, post: 3494858"]
Just to chime in and write the C++ in a more C++ style.

#include <iostream>
#include <cstdlib>
#include <ctime>
#include <string>
#include <algorithm>
#include <vector>

using namespace std;

const int len = 50000000;

struct myRandom
{
	char operator()() const { return std::rand() % 26 + 'a';}
};

int main( int argc, char *argv[])
{
	std::vector<char>	data(len);

clock_t start	= clock();
	std::generate_n(&data[0],len,myRandom());
	std::string	str(data.begin(),data.end());
	clock_t end	= clock();

std::cout <<"Time: " <<
			double(end-start)/CLOCKS_PER_SEC * 1000 << " ms" << std::endl;
}
import java.util.*;

public class Find{

public static void main(String[] arg)
  {
         final int len = 50000000;

long start = System.currentTimeMillis();
         String s = randomString(len);
         long end = System.currentTimeMillis();

System.out.println("Time: " + (end - start) + " ms");
	}

//returns a String of length l with lowercase letters from a to z
  static String randomString(int len)
  {
          char[] cr = new char[len];
          Random rd = new Random();
          for (int i = 0; i < len; i++){
             int num =  rd.nextInt(26) + 97;
              cr [i] = (char) num;
         }

return new String(cr);

}
Time: 3654 ms
Time: 873.487 ms[/i]
[/QUOTE]

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