Hi, It is an issue with version of JDK. Would suggest not to have multiple versions of JDK on your box and run the following commands to see the actual version of Java used at runtime: - javac -version java -version
The output of both should be same version and minimum JDK.1.7 Thanks, Sumit On Thursday, 23 April 2015 23:08:05 UTC+5:30, Hank Taylor wrote: > > Hi Peter, > > I'm forwarding your message on to our Google Group who should be able to > address it better than I can here. Best of luck! > > Hank > > ---------- Forwarded message ---------- > From: <[email protected] <javascript:>> > Date: Thu, Apr 23, 2015 at 7:56 AM > Subject: Question about your example "EmbeddedNeo4j.java" from your webpage > To: [email protected] <javascript:> > > > Hello, > > > > I downloaded and installed the neo4j community edition. > > My current aim is, to get a simple example on how to use neo4j with > embedded java to run. > > Therefore, I am looking on your documentation and especially the > “HelloWorld” example (Program name: EmbeddedNeo4j.java) ( > http://neo4j.com/docs/stable/tutorials-java-embedded-hello-world.html ). > > I want to compile and run this small example on the command line (cmd) > using a JDK and including your libraries. > > I have some questions: > > > > · Setting up the environment > > I want to identify the needed libs (jar-files) and include them in my > javac / java call. > > According to > http://neo4j.com/docs/stable/tutorials-java-embedded-setup.html I have to > include the libraries from a lib directory. > > But in the community edition 2.2.1 I do not find any lib directory. I > searched for .jar and found > > c:\Program Files (x86)\Neo4j Community\.install4j\i4jruntime.jar > > c:\Program Files (x86)\Neo4j Community\.install4j\ user.jar > > c:\Program Files (x86)\Neo4j Community\bin\neo4j-desktop-2.2.1.jar > > > > They all do not include the class org.neo4j.graphdb.Direction, which is > imported in the example. > > > > I looked, which jar has class Direction included, and found different > versions neo4j-kernel-“version”.jar, especially neo4j-kernel-2.2.1.jar; > > > > javac -classpath > d:\jars_neo4j\neo4j-kernel-2.2.1.jar;D:\Programme\Java\java_ee_sdk-7u1\glassfish4\glassfish\lib\javaee.jar;d:\jars_neo4j\neo4j-io-2.2.1.jar > > EmbeddedNeo4j.java > > > > > > Generates the following error: > > > > D:\devneo4j> > > javac -classpath > d:\jars_neo4j\neo4j-kernel-2.2.1.jar;D:\Programme\Java\java_ee_sdk-7u1\glassfish4\glassfish\lib\javaee.jar;d:\jars_neo4j\neo4j-io-2.2.1.jar > > EmbeddedNeo4j.java > > EmbeddedNeo4j.java:25: cannot access org.neo4j.graphdb.Direction > > bad class file: > d:\jars_neo4j\neo4j-kernel-2.2.1.jar(org/neo4j/graphdb/Direction.class) > > class file has wrong version 51.0, should be 49.0 > > Please remove or make sure it appears in the correct subdirectory of the > classpath. > > import org.neo4j.graphdb.Direction; > > > > I extracted the kernel jar to a directory / subfolder and > included directly the classed needed , no change. > > > > · Your Example code, especially starting transactions > > In your example ( > > You write: > > try ( Transaction tx = graphDb.beginTx() ) > > { > > // Database operations go here > > tx.success(); > > } > > Both of my jdks (1.7, 1.8) do not like that, I changed > this part to the program code of a previous version, (see the yellow part > change/insertion). > > > > Transaction tx = graphDb.beginTx(); > > try > > { > > …. > > // START SNIPPET: transaction > > tx.success(); > > } > > finally { > > tx.finish(); > > } > > > > In case your comment means, one has to change the example code – I find > that misleading. People you be able to start with programs easily. > > > > I hope, my changes are not the reason for the above > error? I think, my changes are right? > > > > My main questions is: how can I get the example to compile and run? I > looked on the web, and found that other Java programmer get the error “class > file has wrong version 51.0, should be 49.0”. > > They changed the JDK or used javac –target 1.x commands. In my case it > does not work. > > Please give me some advice, on how to get the example to run. > > > > Thank you in advance for your help! > > > > Kind regards, > > Peter > > > > *Dr. Peter Leven* > Advanced Visual Solutions > ::Virtual Engineering > Daimler Protics GmbH (ITM/PRO) > 628-U058 > 89081 Ulm/Germany > > Im Auftrag der/on behalf of Daimler AG > RD/FNT > 71059 Sindelfingen/Germany > > Phone > > +49 176 30 90 69 84 > > E-Mail > > [email protected] <javascript:> > > > > > Daimler Protics GmbH > Sitz und Registergericht/Domicile and Register Court: Stuttgart, > HRB-Nr./Commercial Register No.: 23635 > Geschäftsführer/Management: Dr. Klaus Grebner (CEO), Ralph Krückel (CFO), > Winfried Rembold (COO) > > > > If you are not the addressee, please inform us immediately that you have > received this e-mail by mistake, and delete it. We thank you for your > support. > > > -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
