How to create a method that removes alphabet only in a String

Question

myString = "my lucky numbers are 6, 8, and 19."

I'm calling myString.remove("ra6"), and this should return "my lucky numbes e 6, 8, nd 19".

Here's what I'm trying to do.

public String remove(String arg) {
    if (myString != null) {
        char[] arrayOfChars1 = myString.toCharArray();
        char[] arrayOfChars2 = arg.toCharArray();
        char[] newArray = 
    }
    return null;
}

I'm trying to create an arrayOfChars1 so that I can compare it to the given String which would be another arrayOfChars2.

and a third array to store the comparison. If a char is in both array (arrayOfChar1 and arrayOfChar2) is found it should be removed but only the alphabets not numbers.

myString = "my lucky numbers are 6, 8, and 19."
myString.remove("ra6") //6 should be ignored.

return "my lucky numbe(r)s (a)(r)e 6, 8, and 19."

only char 'a' and 'r' should be removed

Use `replaceAll` using a character class containing those characters: `"[ra6]"`. Replace them all with nothing: `""` — Vince, Apr 11 '21 at 04:04
only the alphabet should be removed if I use replaceAll even then numbers will be replaced — Jethro, Apr 11 '21 at 04:07
Remove the number from the argument first https://stackoverflow.com/questions/17516049/java-removing-numeric-values-from-string — Martheen, Apr 11 '21 at 04:08

score 2 · Answer 1 · edited Apr 11 '21 at 11:10

You can first remove all non letter characters from the String of characters to replace and use String#replaceAll with a character class.

String s = "my lucky numbers are 6, 8, and 19.";
String remove = "ra6";
String res = s.replaceAll("["+
      remove.replaceAll("[^A-Za-z]", "")
     +"]", "");
System.out.println(res);

only char 'a' and 'r' should be removed

You can replace the regex, [ar] with "". The regex, [ar] means one of the characters inside the square bracket and is known as Character Classes.

String myString = "my lucky numbers are 6, 8, and 19.";
myString = myString.replaceAll("[ar]", "");
System.out.println(myString);// my lucky numbes e 6, 8, nd 19.

How to create a method that removes alphabet only in a String

1 Answers1