How to find the String that contains only alphabets

Today we will see how to  find list of Strings that contains only alphabets. In this post I did this with and without using regular expression and using java 8 streams.

package com.interviewCodes.string;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import java.util.stream.Collectors;

public class AlphaString {

       public static void main(String[] args) {

              List<String> strlist = Arrays.asList("abc12#", "abc", "def", "gh$45", "ghi");

              // find the string that contains only alphabets

              System.out.println("List of Strings :: " + strlist);

              System.out.println("Without using reg exp :: " + alphaStrings(strlist));

              System.out.println("Using reg exp :: " + alphaStringsUsingRegExp(strlist));

              System.out.println("Using Java 8 :: " + alphaStringsUsingJava8(strlist));

       }

       // Without using REG EXP

       public static List<String> alphaStrings(List<String> list) {

              List<String> alphaStrlist = new ArrayList<>();

              for (String str : list) {

                     char[] chars = str.toCharArray();

                     for (char c : chars) {

                           if (!Character.isLetter(c))

                                  continue;

                           if (str.endsWith(Character.toString(c)))

                                  alphaStrlist.add(str);

                     }

              }

              return alphaStrlist;

       }

       // Using REG EXP

       public static List<String> alphaStringsUsingRegExp(List<String> list) {

              List<String> alphaStrList = new ArrayList<>();

              for (String str : list) {

                     if (str.matches("[a-zA-Z]*$"))

                           alphaStrList.add(str);

              }

              return alphaStrList;

       }

       // Using Java8

      public static List<String> alphaStringsUsingJava8(List<String> list) {

              return list.stream()

                         .filter(i -> i.chars().allMatch(Character::isLetter))

                         .collect(Collectors.toList());

       }

}

Please let me know if there any other better way to do this and also correct me if any mistakes in this post.

Thanks for reading :)