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Java example source code file (VertexSequence.java)

This example Java source code file (VertexSequence.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

igraph, ivertexsequence, nosuchelementexception, override, unsupportedoperationexception, util, vertexsequence

The VertexSequence.java Java example source code

package org.deeplearning4j.graph.graph;

import org.deeplearning4j.graph.api.IGraph;
import org.deeplearning4j.graph.api.Vertex;
import org.deeplearning4j.graph.api.IVertexSequence;

import java.util.NoSuchElementException;

/**A vertex sequence represents a sequences of vertices in a graph
 * @author Alex Black
public class VertexSequence<V> implements IVertexSequence {
    private final IGraph<V,?> graph;
    private int[] indices;
    private int currIdx = 0;

    public VertexSequence(IGraph<V, ?> graph, int[] indices){
        this.graph = graph;
        this.indices = indices;

    public int sequenceLength() {
        return indices.length;

    public boolean hasNext() {
        return currIdx < indices.length;

    public Vertex<V> next() {
        if(!hasNext()) throw new NoSuchElementException();
        return graph.getVertex(indices[currIdx++]);

    public void remove(){
        throw new UnsupportedOperationException();

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