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1 files changed, 83 insertions, 0 deletions

diff --git a/labs/lab09_iterator/SListIteratorTester.java b/labs/lab09_iterator/SListIteratorTester.java
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+++ b/labs/lab09_iterator/SListIteratorTester.java
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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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