public class Test {
  public static void main(String [] args) {
    new Test().run();
  }

  public void run() {
    int mycards[] = {3, 7, 2, 9, 4};

    int max= mycards[0];

    for (int i = 1; i < 5; i++) {
      if (mycards[i] > max) max = mycards[i];
    }

    System.out.println("Max is: " + max);
  }
}