Hello,  I try to check hexadecimal character codes according to this specification : "Only allow characters which hexadecimal code is between 20 and 7E".  I tried this : myString.matches("[\\x20-\\7E]"); but it doesn't work.  Any idea ?  

Greetings - I've been tasked with coming up with an expression that would do password validation for our application. After doing a search for ideas I came across this site and this is the solution I was able to come up with: Language: Java Problem: A valid password is a minimum of eight characters and a maximum of sixteen. It contatins at ...