finishing DownloadWorker, ProgressMonitor, and Main

src/main/java/DownloadWorker.java

@@ -22,22 +22,53 @@ public class DownloadWorker implements Runnable {
     @Override
     public void run() {
         // TODO: Record the chunk start time in chunkStatus.
+        chunkStatus.setStartTimeMs(System.currentTimeMillis());
         double downloaded = 0.0;
+        System.out.printf("[%s] Started — Chunk #%d (%.1f MB)%n",
+                Thread.currentThread().getName(),
+                chunkStatus.getChunkId(),
+                chunkStatus.getChunkSizeMB());
 
         // TODO: Print a message that this chunk has started downloading.
 
         while (downloaded < chunkStatus.getChunkSizeMB()) {
+            int delay = config.getMinStepDelayMs()
+                    + random.nextInt(config.getMaxStepDelayMs() - config.getMinStepDelayMs() + 1);
+
             // TODO: Generate a random sleep delay between min and max delay.
             // TODO: Sleep for that delay.
             // TODO: Generate a random download amount for this step.
             // TODO: Increase downloaded, but do not go beyond chunk size.
             // TODO: Save the updated downloaded value into chunkStatus.
             // TODO: Optionally print step-by-step progress.
-        }
+            try {
+                Thread.sleep(delay);
+            } catch (InterruptedException e) {
+                Thread.currentThread().interrupt();
+                return;
+            }
+            double step = config.getMinStepDownloadMB()
+                    + random.nextDouble() * (config.getMaxStepDownloadMB() - config.getMinStepDownloadMB());
+            downloaded = Math.min(downloaded + step, chunkStatus.getChunkSizeMB());
+            chunkStatus.setDownloadedMB(downloaded);
+            System.out.printf("[%s] Chunk #%d → %.2f / %.1f MB (%.1f%%)%n",
+                    Thread.currentThread().getName(),
+                    chunkStatus.getChunkId(),
+                    chunkStatus.getDownloadedMB(),
+                    chunkStatus.getChunkSizeMB(),
+                    chunkStatus.getProgressPercentage());
+            }
 
         // TODO: Mark the chunk as completed.
         // TODO: Record the chunk end time in chunkStatus.
         // TODO: Print a message that this chunk has finished downloading.
-    }
+    chunkStatus.setCompleted(true);
+    chunkStatus.setEndTimeMs(System.currentTimeMillis());
+
+        System.out.printf("[%s] Finished — Chunk #%d in %d ms%n",
+                Thread.currentThread().getName(),
+                chunkStatus.getChunkId(),
+                chunkStatus.getDownloadDurationMs());
+}
 
 }

src/main/java/Main.java

@@ -37,6 +37,7 @@ public class Main {
             // TODO:
             // Students may print helpful debug information here,
             // for example which chunk is assigned to which worker thread.
+            System.out.println("Assigned " + chunk + " to " + workerThread.getName());
         }
 
         // 4. Create and start monitor thread
@@ -48,12 +49,15 @@ public class Main {
         // so that progress can be displayed while downloading happens.
         //
         // Example idea:
-        // monitorThread.start();
+         monitorThread.start();
 
         // 5. Start worker threads
         // TODO:
         // Start each worker thread in workerThreads.
         // Use a loop and call start() on each thread.
+        for (Thread thread : workerThreads) {
+            thread.start();
+        }
 
         // 6. Wait for workers to finish
         // TODO:
@@ -64,6 +68,20 @@ public class Main {
         // for (Thread thread : workerThreads) {
         //     thread.join();
         // }
+        // 6. Wait for workers to finish
+        try {
+            for (Thread thread : workerThreads) {
+                thread.join();
+            }
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        }
+
+        try {
+            monitorThread.join();
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        }
 
         // TODO:
         // After all workers finish, the monitor thread may also need to stop.

src/main/java/ProgressMonitor.java

@@ -57,7 +57,10 @@ public class ProgressMonitor implements Runnable {
 
             // TODO:
             // If all chunks are completed, print a final message and exit the loop
-
+            if (completedChunks == chunks.size()) {
+                System.out.println("[Monitor] All chunks completed. Download finished!");
+                break;
+            }
             try {
                 Thread.sleep(monitorDelayMs);
             } catch (InterruptedException e) {