Example of Encryption and Decryption of text.
http://www.code2learn.com/2011/06/encryption-and-decryption-of-data-using.html

regular expression example how to find phon no from string. String line = "8149449343 "; String exactPhonePattern = "\\d{12}|\\d{10}$"; String phonePattern = "(.*?)(\\d{12}|\\d{10})(.*)"; // Create a Pattern object Pattern r = Pattern.compile(phonePattern); Pattern macthNo = Pattern.compile(exactPhonePattern); // Now create matcher object. Matcher m = r.matcher(line); if ( m.matches() ) { for(int i = 0 ; i < m.groupCount() ; i++){ if(macthNo.matcher(m.group(i)).matches()){ System.out.println("Found value: "+i+" - " + m.group(i) ); } } } else { System.out.println("NO MATCH"); }
Email address regular expression
^[a-zA-Z][\\w\\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\\w\\.-]*[a-zA-Z0-9]\\.[a-zA-Z][a-zA-Z\\.]*[a-zA-Z]$