/*
David Vajda, 7828020
Schickhardstrasse 5
D-72072, Tuebingen
https://www.ituenix.de
david@ituenix.de
*/
class RingListExample {
public static void main (String [] args) {
int i;
RingLinList head;
if (args.length != 0)
head = new RingLinList (args [0]);
else
head = new RingLinList ();
for (i = 1; i < args.length; i++)
head.insert (args [i]);
head.print ();
}
static class RingLinList {
RingLinList next;
RingLinList prev;
String val;
RingLinList () {
this.next = this;
this.prev = this;
this.val = null;
}
RingLinList (String val) {
this.next = this;
this.prev = this;
this.val = val;
}
void insert (String val) {
RingLinList ptr = new RingLinList (val);
ptr.prev = this.prev;
ptr.next = this;
this.prev.next = ptr;
this.prev = ptr;
return;
}
void print () {
if ((this.next == this) && (this.prev == this) && (this.val == null))
System.out.println ("This ring list is empty!");
else if ((this.next == this) && (this.prev == this) && (this.val != null)) {
System.out.println (this.val);
}
else {
RingLinList ptr = this;
while (ptr.next != this) {
System.out.println (ptr.val);
ptr = ptr.next;
}
System.out.println (ptr.val);
}
return;
}
}
}
