Alphanumeric regular expression for letters and numbers only

Question

I want to match an alphanumeric string containing at least one letter and one number. Is there an easy way to combine the following into a single regular expression?

strValue.matches("[A-Z0-9]+") && strValue.matches(".*[AZ].*") && strValue.matches(".*[0-9].*") 

Answer 1

Use the expression "look ahead."

 strValue.matches("^(?=.*[AZ])(?=.*\\d)[AZ\\d]+$")