Calculate process time

import java.util.*;

public class CalculateProcessTime{
  public static void main(String[] args){
    int repeat = 2000;
    double[] ds = {Double.MAX_VALUE, -3.14e-200D, Double.NEGATIVE_INFINITY, 567.89023D,
123e199D, -0.000456D, -1.234D, 1e55D};
    long[] ls = {2283911683699007717L, -8007630872066909262L, 4536503365853551745L,
548519563869L, 45L, Long.MAX_VALUE, 1L, -9999L, 7661314123L, 0L};
    long time;
    StringBuffer s = new StringBuffer();
    Hashtable<Object,Object> h = new Hashtable<Object,Object>();
    System.out.println("Starting test");
    time = System.currentTimeMillis();
    for(int i = repeat; i > 0; i--){
      s.setLength(0);
      for(int j = ds.length-1; j >= 0; j--){
        s.append(ds[j]);
        h.put(new Double(ds[j]), Boolean.TRUE);
      }
      for(int j = ls.length-1; j >= 0; j--){
        s.append(ls[j]);
        h.put(new Long(ls[j]), Boolean.FALSE);
      }
    }
    time = System.currentTimeMillis() - time;
    System.out.println(" The test took " + time + " milliseconds");
  }
}