Bagaimana untuk membuat kelas tidak berubah dalam java? jelaskan dengan contoh

    public final class ImmutablePoint {
        private final int x;
        private final int y;

        public ImmutablePoint(int x, int y) {
            this.x = x;
            this.y = y;
        }

        public int getX() {
            return x;
        }

        public int getY() {
            return y;
        }

        // Example of returning a new instance instead of modifying the current one
        public ImmutablePoint move(int deltaX, int deltaY) {
            return new ImmutablePoint(this.x + deltaX, this.y + deltaY);
        }
    }

    public class Main {
        public static void main(String[] args) {
            ImmutablePoint point1 = new ImmutablePoint(1, 2);
            System.out.println("Point1: (" + point1.getX() + ", " + point1.getY() + ")");

            // Moving the point creates a new instance
            ImmutablePoint point2 = point1.move(3, 4);
            System.out.println("Point2: (" + point2.getX() + ", " + point2.getY() + ")");
            System.out.println("Point1 remains unchanged: (" + point1.getX() + ", " + point1.getY() + ")");
        }
    }