step 4

src/hackingrace/DescendingHackerThread.java

@@ -6,6 +6,7 @@ public class DescendingHackerThread extends HackerThread
         super(vault,"Descending Hacker");
     }
     @Override
+    //// Attempts to guess the password starting from 9999, decrementing down to 0
     public void run(){
         for(int guess=10000; guess>=0;guess --)
         {

src/hackingrace/PoliceThread.java

@@ -6,22 +6,25 @@ public class PoliceThread extends  Thread{
         super("Police");
     }
 @Override
+// Counts down from 10 seconds (time available before police arrive)
 public void run(){
         for(int i = 10; i>=0;i--)
     if (i > 0) {
         System.out.printf("Police arrive in %d seconds...\n", i);
     } else {
-        // عند الوصول إلى 0، تفوز الشرطة [cite: 23, 31]
+
         System.out.println("\n**************************************************");
         System.out.println("Game over for you hackers! Police have arrived.");
         System.out.println("**************************************************");
-        // يُنهي البرنامج بالكامل [cite: 23, 57]
+      // Terminate the entire program
         System.exit(0);
     }
         try{
+            // Waits for one second (1000 milliseconds) for each count
             Thread.sleep(1000);
 
         } catch (InterruptedException e){
+            // If this thread is interrupted, it means a hacker won, so we stop the countdown
                     return;
         }