Simple commands to handle java/jar file

To compile a java file to generate class

$ javac helloworld.java

To execute of file

$ java helloworld

If you need include another jar file, please do like the following commands:

$ javac -cp ".:./jars/common.jar" helloworld.java 
$ java -cp ".:./jars/common.jar" helloworld

If you need view the contents of a JAR file, please do like the following command:

$ jar -tf helloworld.jar