just after execution I goat a exception that is Exception in thread "main" java.lang.IllegalArgumentException: Usage: java org.apache.commons.codec.cli.Digest [algorithm] [FILE|DIRECTORY|string] ... at org.apache.commons.codec.cli.Digest.(Digest.java:66) at org.apache.commons.codec.cli.Digest.main(Digest.java:53) What will be the solution of this exception
