The Java Program: BodyMain3.java
1 class Body {
2 long idNum;
3 String nameFor;
4 Body orbits;
5
6 static long nextID = 0;
7
8 Body () {
9 idNum = nextID++;
10 }
11
12 Body (String n) {
13 idNum = nextID++;
14 nameFor = n;
15 orbits = null;
16 }
17
18 Body (String n, Body o) {
19 idNum = nextID++;
20 nameFor = n;
21 orbits = o;
22 }
23
24 }
25
26 class BodyMain3 {
27
28 public static void main (String args[]) {
29
30 Body sun = new Body("Sol", null);
31 Body earth = new Body("Earth", sun);
32
33 }
34
35 }