Build_Main_Class

src/DescendingHackerThread.java

-package PACKAGE_NAME;
+public class DescendingHackerThread extends Thread {
+    private Vault vault;
 
-public class DescendingHackerThread {
-}
+    public DescendingHackerThread(Vault vault) {
+        this.vault = vault;
+        this.setName("DescendingHacker");
+        this.setPriority(Thread.MAX_PRIORITY);
+    }
+
+    @Override
+    public void run() {
+        System.out.println(this.getName() + " started hacking from 9999 to 0");
+
+        // Try every number from 9999 down to 0
+        for (int guess = 9999; guess >= 0; guess--) {
+            if (vault.isCorrectPassword(guess)) {
+                System.out.println(this.getName() + " cracked the vault! Password: " + guess);
+                System.exit(0);
+            }
+        }
+        System.out.println(this.getName() + " finished but didn't find the password!");
+    }
+}
\ No newline at end of file

src/Main.java

 public class Main {
+    public static void main(String[] args) {
+        System.out.println("Vault Hacking Race Started!");
+        // Create a vault with random password
+        Vault vault = new Vault();
 
+        AscendingHackerThread ascendingHacker = new AscendingHackerThread(vault);
+        DescendingHackerThread descendingHacker = new DescendingHackerThread(vault);
+        PoliceThread police = new PoliceThread();
+
+        System.out.println("Starting all threads...");
+
+        ascendingHacker.start();
+        descendingHacker.start();
+        police.start();
+
+        System.out.println("All threads are running !");
+    }
 }
\ No newline at end of file

src/PoliceThread.java

-package PACKAGE_NAME;
+public class PoliceThread extends Thread {
 
-public class PoliceThread {
-}
+    public PoliceThread() {
+        this.setName("Police");
+    }
+
+    @Override
+    public void run() {
+        System.out.println("Police are on the way! 10 seconds remaining...");
+
+        // Countdown from 10 to 1
+        for (int i = 10; i > 0; i--) {
+            try {
+                // Wait for 1 second (1000 milliseconds)
+                Thread.sleep(1000);
+                System.out.println(i + " seconds remaining...");
+            } catch (InterruptedException e) {
+                System.out.println("Police thread was interrupted!");
+                e.printStackTrace();
+            }
+        }
+
+        // If we reach here, time is up and police arrived
+        System.out.println("Game over for you hackers! Police arrived!");
+        System.exit(0);  // End the entire program
+    }
+
+}
\ No newline at end of file