implement Main.java

src/main/java/Main.java

@@ -37,12 +37,38 @@ public class Main {
             // TODO:
             // Students may print helpful debug information here,
             // for example which chunk is assigned to which worker thread.
+            System.out.println(
+                    "new thread " + workerThread.getName() + " created for chunk " + chunk.getChunkId()
+            );
         }
 
         // 4. Create and start monitor thread
         ProgressMonitor monitor = new ProgressMonitor(config, chunks);
         Thread monitorThread = new Thread(monitor, "Progress-Monitor");
 
+        monitorThread.start();
+
+        for (Thread thread : workerThreads) {
+
+            thread.start();
+        }
+
+        try {
+            for (Thread thread : workerThreads) {
+                thread.join();
+            }
+        } catch (InterruptedException e) {
+            System.out.println("Download manager was interrupted. Stopping all workers...");
+            monitorThread.interrupt();
+
+            for (Thread worker : workerThreads) {
+                worker.interrupt();
+            }
+
+            Thread.currentThread().interrupt();
+            return;
+        }
+
         // TODO:
         // Start the monitor thread before starting the workers
         // so that progress can be displayed while downloading happens.