public class Cycle extends Object
Cycleclass represents a data type for determining whether an undirected graph has a cycle. The hasCycle operation determines whether the graph has a cycle and, if so, the cycle operation returns one.
This implementation uses depth-first search. The constructor takes time proportional to V + E (in the worst case), where V is the number of vertices and E is the number of edges. Afterwards, the hasCycle operation takes constant time; the cycle operation takes time proportional to the length of the cycle.
For additional documentation, see Section 4.1 of Algorithms, 4th Edition by Robert Sedgewick and Kevin Wayne.
|Constructor and Description|
Determines whether the undirected graph
|Modifier and Type||Method and Description|
Returns a cycle in the graph
Returns true if the graph
Unit tests the
public Cycle(Graph G)
Ghas a cycle and, if so, finds such a cycle.
G- the undirected graph
public boolean hasCycle()
Ghas a cycle.
trueif the graph has a cycle;
Ghas a cycle, and
public static void main(String args)
args- the command-line arguments