The JAR file is located at $JAVA_HOME/jre/classes/myLib.jar.
The JAR file is located at $JAVA_HOME/jre/lib/ext/myLib.jar..
The JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/myLib.jar/Paper.class.
The JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/myLib.jar.
The JAR file is located at /foo/myLib.jar and the Book class is compiled using javac -cp /foo/myLib.jar/Paper Book.java.
The JAR file is located at /foo/myLib.jar and the Book class is compiled using javac -d /foo/myLib.jar Book.java
The JAR file is located at /foo/myLib.jar and the Book class is compiled using javac -classpath /foo/myLib.jar Book.java