Java – find words that contain only the given characters: regex

I have a set of words For example,

abc,adb,acb,cab,abcc,abk,bacc

If I want to find only

So, what I need is

abc,bacc

I need to find it using regular expressions Can someone help me

Solution

The following regular expression will only find all your words, including ABC characters

Pattern regex = Pattern.compile("\\b[abc]+\\b");
    Matcher regexMatcher = regex.matcher(subjectString);
    while (regexMatcher.find()) {
        // matched text: regexMatcher.group()
        // match start: regexMatcher.start()
        // match end: regexMatcher.end()
    }