changed the file structure

Code/Steiner/oop_theorie_1/src/App.java

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+// App.java
+public class App {
+    public static void main(String[] args) {
+        Date my_birthday = new Date();
+
+        // Input birthday using the Date class method
+        my_birthday.inputBirthday();
+
+        // Print the entered birthday
+        System.out.println("Your birthday: " + my_birthday.day + " " + my_birthday.month + " " + my_birthday.year);
+
+        // Calculate and print the age
+        int age = my_birthday.calculateAge();
+        System.out.println("Your age is: " + age);
+    }
+}

Code/Steiner/oop_theorie_1/src/Date.java

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+import java.time.LocalDate;
+import java.time.Period;
+import java.time.Month;
+import java.util.Locale;
+import java.util.Scanner;
+
+public class Date {
+    public int day;
+    public String month;
+    public int year;
+
+    // Method to get the current date as a formatted string
+    public String getCurrentDate() {
+        LocalDate now = LocalDate.now(); // Get current date only
+        return now.toString();
+    }
+
+    // Method to calculate the age based on the birthday
+    public int calculateAge() {
+        int monthNumber = getMonthNumber();
+        if (monthNumber == -1) {
+            throw new IllegalArgumentException("Invalid month name: " + month);
+        }
+
+        LocalDate birthDate = LocalDate.of(year, monthNumber, day);
+        LocalDate currentDate = LocalDate.now();
+        return Period.between(birthDate, currentDate).getYears();
+    }
+
+    // Method to convert the month name to a month number
+    private int getMonthNumber() {
+        try {
+            Month monthEnum = Month.valueOf(month.toUpperCase(Locale.ENGLISH));
+            return monthEnum.getValue();
+        } catch (IllegalArgumentException e) {
+            return -1;
+        }
+    }
+
+    // Method to input and set the date fields (day, month, year)
+    public void inputBirthday() {
+        Scanner scan = new Scanner(System.in);
+
+        // Input for day
+        System.out.println("Enter your birth day (e.g., 16):");
+        this.day = scan.nextInt();
+
+        // Input for month with validation loop
+        scan.nextLine(); // Consume the newline
+        boolean validMonth = false;
+        while (!validMonth) {
+            System.out.println("Enter your birth month (e.g., November):");
+            this.month = scan.nextLine();
+
+            if (getMonthNumber() != -1) {
+                validMonth = true;
+            } else {
+                System.out.println("Invalid month name. Please try again.");
+            }
+        }
+
+        // Input for year
+        System.out.println("Enter your birth year (e.g., 2005):");
+        this.year = scan.nextInt();
+    }
+}

Code/Steiner/oop_theorie_1/src/Time.java

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+import java.time.LocalDateTime;
+
+public class Time {
+    public static void main(String[] args) {
+        // Get the current date and time
+        LocalDateTime now = LocalDateTime.now();
+
+        // Format the current date and time
+
+        // Print the formatted date and time
+        System.out.println("Current date and time: " + now);
+    }
+}