String aft = null; String bet = ""; //превращаем лист в строку: for (int i=0; i<list.size(); i++) { aft = list.get(i); bet = bet.concat(aft); } //превращаем строку в массив символов char[] chars = bet.toCharArray(); int a=0; int b=0; int v=0; int g=0; int d=0; int e=0; int ee=0; int zh=0; int z=0; int u=0; int uu=0; int k=0; int l=0; int m=0; int n=0; int o=0; int p=0; int r=0; int s=0; int t=0; int y=0; int f=0; int x=0; int ts=0; int ch=0; int sh=0; int shi=0; int tv=0; int yi=0; int mg=0; int we=0; int yu=0; int ya=0; for (int i=0; i<chars.length; i++) { Character by = chars[i]; if (by.equals('а')) a++; if (by.equals('б')) b++; if (by.equals('в')) v++; if (by.equals('г')) g++; if (by.equals('д')) d++; if (by.equals('е')) e++; if (by.equals('ё')) ee++; if (by.equals('ж')) zh++; if (by.equals('з')) z++; if (by.equals('и')) u++; if (by.equals('й')) uu++; if (by.equals('к')) k++; if (by.equals('л')) l++; if (by.equals('м')) m++; if (by.equals('н')) n++; if (by.equals('о')) o++; if (by.equals('п')) p++; if (by.equals('р')) r++; if (by.equals('с')) s++; if (by.equals('т')) t++; if (by.equals('у')) y++; if (by.equals('ф')) f++; if (by.equals('х')) x++; if (by.equals('ц')) ts++; if (by.equals('ч')) ch++; if (by.equals('ш')) sh++; if (by.equals('щ')) shi++; if (by.equals('ъ')) tv++; if (by.equals('ы')) yi++; if (by.equals('ь')) mg++; if (by.equals('э')) we++; if (by.equals('ю')) yu++; if (by.equals('я')) ya++; } // System.out.println(bet); System.out.println("а" + " " + a); System.out.println("б" + " " + b); System.out.println("в" + " " + v); System.out.println("г" + " " + g); System.out.println("д" + " " + d); System.out.println("е" + " " + e); System.out.println("ё" + " " + ee); System.out.println("ж" + " " + zh); System.out.println("з" + " " + z); System.out.println("и" + " " + u); System.out.println("й" + " " + uu); System.out.println("к" + " " + k); System.out.println("л" + " " + l); System.out.println("м" + " " + m); System.out.println("н" + " " + n); System.out.println("о" + " " + o); System.out.println("п" + " " + p); System.out.println("р" + " " + r); System.out.println("с" + " " + s); System.out.println("т" + " " + t); System.out.println("у" + " " + y); System.out.println("ф" + " " + f); System.out.println("х" + " " + x); System.out.println("ц" + " " + ts); System.out.println("ч" + " " + ch); System.out.println("ш" + " " + sh); System.out.println("щ" + " " + shi); System.out.println("ъ" + " " + tv); System.out.println("ы" + " " + yi); System.out.println("ь" + " " + mg); System.out.println("э" + " " + we); System.out.println("ю" + " " + yu); System.out.println("я" + " " + ya);