import org.jgrapht.*;
import org.jgrapht.graph.*;

// 创建有向图
Graph<String, DefaultEdge> directedGraph = new DefaultDirectedGraph<>(DefaultEdge.class);

// 添加顶点
directedGraph.addVertex("v1");
directedGraph.addVertex("v2");

// 添加边
directedGraph.addEdge("v1", "v2");

import org.neo4j.driver.*;

Driver driver = GraphDatabase.driver("bolt://localhost:7687", 
    AuthTokens.basic("username", "password"));

try (Session session = driver.session()) {
    Result result = session.run("MATCH (n) RETURN n LIMIT 10");
    while (result.hasNext()) {
        Record record = result.next();
        System.out.println(record);
    }
}

import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
import org.apache.tinkerpop.gremlin.structure.Graph;
import org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerGraph;

Graph graph = TinkerGraph.open();
GraphTraversalSource g = graph.traversal();

g.addV("person").property("name", "Alice").next();
g.addV("person").property("name", "Bob").next();
g.V().has("name", "Alice").addE("knows").to(g.V().has("name", "Bob")).next();