Package algs41

# Class EulerianPath

java.lang.Object
algs41.EulerianPath

public class EulerianPath extends Object
The EulerianPath class represents a data type for finding an Eulerian path in a graph. An Eulerian path is a path (not necessarily simple) that uses every edge in the graph exactly once.

This implementation uses a nonrecursive depth-first search. The constructor runs in O(E + V) time, and uses O(E + V) extra space, where E is the number of edges and V the number of vertices All other methods take O(1) time.

To compute Eulerian cycles in graphs, see EulerianCycle. To compute Eulerian cycles and paths in digraphs, see DirectedEulerianCycle and DirectedEulerianPath.

For additional documentation, see Section 4.1 of Algorithms, 4th Edition by Robert Sedgewick and Kevin Wayne.

Author:
Robert Sedgewick, Kevin Wayne, Nate Liu
• ## Constructor Summary

Constructors
Constructor
Description
Computes an Eulerian path in the specified graph, if one exists.
• ## Method Summary

Modifier and Type
Method
Description
boolean
Returns true if the graph has an Eulerian path.
static void
main(String[] args)
Unit tests the EulerianPath data type.
Returns the sequence of vertices on an Eulerian path.

### Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
• ## Constructor Details

• ### EulerianPath

public EulerianPath(Graph G)
Computes an Eulerian path in the specified graph, if one exists.
Parameters:
G - the graph
• ## Method Details

• ### path

public  path()
Returns the sequence of vertices on an Eulerian path.
Returns:
the sequence of vertices on an Eulerian path; null if no such path
• ### hasEulerianPath

public boolean hasEulerianPath()
Returns true if the graph has an Eulerian path.
Returns:
true if the graph has an Eulerian path; false otherwise
• ### main

public static void main(String[] args)
Unit tests the EulerianPath data type.
Parameters:
args - the command-line arguments