[Solved] Dutch National Flag case study

Complete the Dutch National Flag case study. You will need to develop the following classes:a. A main class that extends JFrame to contain the flag and a control button (Sort).b. A class to represent the flag; an extension of JPanel is suggested. This class will contain the array of threads and the sort method.c. A class to represent a thread. Each thread should have a color and a method to draw the thread.