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import java.util.Random;
public class SListIteratorTester
{
public static void main(String[] args)
{
// Construct a list and add entries
int numberOfData = 50000; // number of data to add to the list
int maxDataValue = 10; // number of different values to add to the list
int[] getEntryArray = new int[numberOfData];
int[] iteratorArray = new int[numberOfData];
SListIterator<Integer> list = new SListIterator<Integer>();
Random rand = new Random();
rand.setSeed(System.nanoTime());
System.out.print("Adding data into the list: ");
for(int i = 0; i < numberOfData; i++)
{
list.addToFirst(rand.nextInt(maxDataValue));
}
System.out.println("Done");
System.out.print("Dry run for the method getEntry(): ");
for(int i = 1; i <= 10; i++)
{
list.getEntry(i);
}
System.out.println("Done");
double startTime; // Start time millisecond
double endTime; // End time millisecond
System.out.print("Time the method getEntry(): ");
// Timing the method getEntry()
startTime = System.currentTimeMillis();
for(int i = 1; i <= numberOfData; i++)
{
getEntryArray[i - 1] = list.getEntry(i);
}
endTime = System.currentTimeMillis();
System.out.println("Done");
double getEntryTime = endTime - startTime;
System.out.print("Time the iterator: ");
Iterator<Integer> iterator = list.getIterator();
startTime = System.currentTimeMillis();
int index = 0;
while(iterator.hasNext())
{
iteratorArray[index] = iterator.next();
index++;
}
endTime = System.currentTimeMillis();
System.out.println("Done");
double iteratorTime = endTime - startTime;
for(int i = 0; i < numberOfData; i++)
{
if(getEntryArray[i] != iteratorArray[i])
{
System.out.println("There is something wrong with your iterator.");
}
}
System.out.println("The method getEntry() took " + getEntryTime + " milliseconds.");
System.out.println("Using iterator took " + iteratorTime + " milliseconds.");
}
}
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