Regex doesn't work in String.matches()

Question

I have this small piece of code

String[] words = {\"{apf\",\"hum_\",\"dkoe\",\"12f\"};
for(String s:words)
{
    if(s.matches(\"[a-z]\"))
    {
        Syste         


        

Answer 1

you must put at least a capture () in the pattern to match, and correct pattern like this:

String[] words = {"{apf","hum_","dkoe","12f"};
for(String s:words)
{
    if(s.matches("(^[a-z]+$)"))
    {
        System.out.println(s);
    }
}