if this program run using command prompt/terminal and command line argument
javac -cp ".;../lib/jbcrypt-0.3m.jar" PasswordGenerator.java
java -cp ".;../lib/jbcrypt-0.3m.jar" PasswordGenerator cmd-arg
- ".;../lib/jbcrypt-0.3m.jar" library path for jbcrypt
- cmd-arg -> command line argument(your password)