import java.util.Arrays; public class AskedQuestion { public static void main(String[] args) { String str = "aakdshfkjhsd123hg3gg4214hj214141g1jkkjgdjhgs@>,dfds!223(dsjfhf4849dfhks"; String str1 = str.replaceAll("[^A-Za-z0-9]",""); System.out.println(str1); char arr[] = str1.toCharArray(); Arrays.sort(arr); String str2 = new String(arr); System.out.println(str2); } }