java language

READ THE EXAM RULES FIRSTHL Complete the code given below to have as successfully compiled code. You cannot erase anything. You will just add missing parts! DO NOT FORGET that your design will be part of the evaluation public class Question public static final int UNKNOWN = 0; public static finalint LINUX = 1; public static final int WINDOWS = 2; private DialogBox dig private int operating system; public Question 1(int os_type) { operating system = 05_type 3 public void prepareWindow() throws Unknownostype if (operating system == WINDOWS) dig = new Windows DialogBox(); } else if (operating system -- LINUX) { dig - new LinuxDialogBox(); } else throw new Unknown OsType("Unknown Os Type": dig show Dialogo: 3