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Your application build path would need to contain those dependencies and all of your application code, so it makes sense to include that implicitly. The IntelliJ GUI does refer to your explicit "Dependencies" and let you edit them. IntelliJ will construct your classpath to include both your application and any dependencies (whether folders or Jars etc.) and passes that to the JVM when you run your application. You can also use the -classpath option when running your application, which would not affect other Java applications running on your system. The -classpath option is preferred because youĬan set it individually for each application without affecting otherĪpplications and without other applications modifying its value. JDK tool (the preferred method) or by setting the CLASSPATHĮnvironment variable. Path") can be set using either the -classpath option when calling a

The class search path (more commonly known by the shorter name, "class

As you say, the CLASSPATH is an environment variable, so it would affect all applications referencing that variable: