Set classpath to include .jar file

Question

I'm working with JGraphT API and trying to compile and run this demo ( https://raw.githubusercontent.com/jgrapht/jgrapht/master/jgrapht-demo/src/main/java/org/jgrapht/demo/HelloJGraphT.java ).

My current directory contains the .java file and the directory called jgrapht-0.9.1. jgrapht-0.9.1 contains the folder lib where all the .jar files are.

I've successfully compiled the file using:

javac -cp ./jgrapht-0.9.1/lib/*: HelloJGraphT.java

But I'm having difficulty running the program. I have tried:

java -cp ./jgrapht-0.9.1/lib/*: HelloJGraphT
java -cp "./jgrapht-0.9.1/lib/*:" HelloJGraphT
java -cp "./jgrapht-0.9.1/lib/*:." HelloJGraphT

Yet none of them worked. I am really confused about the syntax of classpath, and really appreciate any help!

Answer 1

First, you must write the full name of the main class:

java -cp "jgrapht-0.9.1/lib/*:." org.jgrapht.demo.HelloJGraphT

Second, I am assuming that the compiled class is in directory structure in the current directory:

org/jgrapht/demo/HelloJGraphT.class

Third, you must use JDK6 or above in order to use wildcard in classpath.