mouredev#49 - Java

Author: ASJordi

Roadmap/49 - EL ALMACÉN DE PAPÁ NOEL/java/asjordi.java

@@ -0,0 +1,70 @@
+import java.security.SecureRandom;
+import java.util.Random;
+import java.util.Scanner;
+
+public class Main {
+
+    private final Random r = new SecureRandom();
+    private final Scanner sc = new Scanner(System.in);
+    private final String ALPHABET = "ABC123";
+    private final int CODE_LENGTH = 4;
+    private final String secretCode;
+
+    public static void main(String[] args) {
+        Main m = new Main();
+        m.start();
+    }
+
+    public Main() {
+        this.secretCode = generateSecretCode();
+    }
+
+    private String generateSecretCode() {
+        StringBuilder sb = new StringBuilder();
+        while (sb.length() < CODE_LENGTH) {
+            char c = ALPHABET.charAt(r.nextInt(ALPHABET.length()));
+            if (sb.indexOf(String.valueOf(c)) == -1) sb.append(c);
+        }
+
+        return sb.toString();
+    }
+
+    public void start() {
+        int attempts = 0;
+
+        while (attempts < 10) {
+            System.out.println("Enter a code:");
+            String code = sc.nextLine();
+            checkCode(code.toUpperCase());
+            attempts++;
+        }
+
+    }
+
+    public void checkCode(String code) {
+        if (code.isBlank()) {
+            System.out.println("Please enter a code");
+            return;
+        }
+
+        if (code.length() != CODE_LENGTH) {
+            System.out.println("The code must be 4 characters long");
+            return;
+        }
+
+        if (code.equals(secretCode)) {
+            System.out.println("Congratulations! You have guessed the secret code.");
+            System.exit(0);
+        }
+
+        for (int i = 0; i < CODE_LENGTH; i++) {
+            char current = code.charAt(i);
+
+            if (current == secretCode.charAt(i)) System.out.println("Character " + current + " is in the correct position");
+            else if (secretCode.indexOf(current) != -1) System.out.println("Character " + current + " is in the secret code, but in the wrong position");
+            else System.out.println("Character " + current + " is not in the secret code");
+        }
+
+    }
+
+}