Use regex to validate a phone number?

if((phone.length() > 10 && 
                    ((phone.contains("+1" + "((\\\\d{3}-)){1,2}\\\\d{4}")) 
                    || (phone.contains("+966" + "d{9}"))))
                    || ((phone.length() == 10) && 
                    !(phone.contains("(") && !(phone.contains(")") &&
                    !(phone.contains("-")))))) //phone doesnt contain special characters if its a saudi no.
                {
                    ....
                }
                else {
                    ....
                }

Hello all :) I'm trying to create a code that validates the following formats of phone numbers and NOTHING else:

1. +9665xxxxxxxx
2. 05xxxxxxxx
3. +1(xxx)xxx-xxxx
4. +1xxxxxxxxxx
5. xxx-xxx-xxxx

I've tried to do this in the code above, where the phone number is represented as String "phone". However I think I've done it incorrectly, especially the regex. Can anyone tell me if there is a simpler way to do this? Or a simplified version of the code? Would it be easier if I used a series of if() statements instead? I'm sorry I'm very new to java so I'm sure I've done something wrong.