Buffered reader - remove punctuation

I need help with reader, which will remove punctuation and numbers and will create array of strings out of the input.

For example, on the input, there will be "example.txt" file which will contain something like this:

Hello 123 , I'am new example ... text file!"

I need my reader to create array which will contain this:

String[] example = {"Hello", "I", "am", "new", "example", "text", "file"}

Is there a way how to remove punctuation and numbers and create array of strings with buffered reader?

Thank you in advance, Fipkus.

In the end, I fixed it like this:

char[] alphabet= {'a','á','b','c','č','d','ď','e','é','ě','f','g','h',
            'i','í','j','k','l','m','n','ň','o','ó','p','q','r','ř','s','š','t','ť',
            'u','ú','ů','v','w','x','y','ý','z','ž','A','Á','B','C','Č','D','Ď','E','É',
            'Ě','F','G','H','I','Í','J','K','L','M','N','Ň','O','Ó','P','Q','R','Ř','S','Š','T',
            'Ť','U','Ú','Ů','V','W','X','Y','Ý','Z','Ž',' '};



                String vlozena = userInputScanner.nextLine();
                String fileContentsSingle = "";
                Integer lenght = vlozena.length();
                int j ;
                char cha;

                        /*
                         * kontroluje, zda se jedná o mezeru či písmeno české abecedy
                         * a poté jej přidá, pokud vyhovuje, do věty
                         */
                for (j = 0; j<lenght;j++) {
                    cha = vlozena.charAt(j);
                    for (char z : abeceda) {
                        if (cha == z) {
                            fileContentsSingle = fileContentsSingle + cha;
                        }
                    }
                }

                fileContentsSingle = fileContentsSingle.replaceAll("\\s+", " ");
                fileContentsSingle = fileContentsSingle.toLowerCase();
                String[] vetaNaArraySingle = fileContentsSingle.split("\\s+",-1);