In this exercise, you will create a new Thread subclass that can be used in conjunction with a Java class called Morse:
class Morse {
public static void main(String[] args) {
DotDash d1, d2, d3;
d1 = new DotDash('.');
d2 = new DotDash('-');
d3 = new DotDash(' ');
d1.start();
d2.start();
d3.start();
}
}