Credentials Test

src/Main.java

@@ -1,19 +1,32 @@
+import java.io.InputStream;
 import java.util.Scanner;
 
 public class Main {
     public static void main(String[] args) {
-        Scanner s = new Scanner(System.in);
+       if(login(System.in)) {
+           System.out.println("Hello World");
+       }
+    }
+
+    public static boolean login(InputStream in) {
+        Scanner s = new Scanner(in);
+
+
+        for (int i = 0; i < 3; i++) {
             System.out.print("Benutzername: ");
             String login = s.next();
             System.out.print("Passwort: ");
             String passwort = s.next();
-        s.close();
 
             Credentials cred = new Credentials(login, passwort);
+
             if (cred.valid()) {
-            System.out.print("Hello World");
-            System.exit(0);
+                return true;
             }
-        System.out.print("Du kommst hier nicht rein");
+
+            System.out.println("Du kommst hier nicht rein");
+        }
+        s.close();
+        return false;
     }
 }