CODEWITHSUNDEEP
javaregex
Kiranaditya
Kiranaditya

Reputation: 459

Find String After Last Dot and Remove Last word which is Starting from Capital letter USing RegEx

String myString = "abc.kiransinh.bapu.abc.events.KiranSinhBorasibBapu";
    Pattern regex = Pattern.compile("[^.]+(?=[^.]*$)[^Bapu]");
    System.out.println(myString);

    Matcher regexMatcher = regex.matcher(myString);

    if (regexMatcher.find()) {
        String ResultString = regexMatcher.group();
        ResultString=ResultString.replaceAll("(.)(\\p{Lu})", "$1_$2").toUpperCase();
        System.out.println(ResultString);
    }

Desire Output is: KIRAN_SINH_BORASIAB

i tried Above code.Want to use only Regex. though i have used replaceAll method.

Desired Output might be possible using only Regex. I am new to regex.Any help woud be too much appreciated. Thanks in Advance :-)

Upvotes: 2

Views: 623

Answers (1)

anubhava
anubhava

Reputation: 785246

You can use this regex to match the string you desire:

String re = "(?<=\\.)(?=[^.]*$)\\p{Lu}\\p{L}*?(?=\\p{Lu}(?=[^\\p{Lu}]*$))";
Pattern pattern = Pattern.compile(re);

RegEx Demo

Use Matcher#find to get your matched text.

Matcher regexMatcher = pattern.matcher( input );

if (regexMatcher.find()) {
   System.out.println( regexMatcher.group() );
}

RegEx Breakup:

(?<=\.)                   # lookbehind to assert preceding char is DOT
(?=[^.]*$)                # lookahead to assert there is no further DOT in text
\p{Lu}                    # match a unicode uppercase letter
\p{L}*?                   # match 0 or more of unicode letters (non-greedy)
(?=\p{Lu}(?=[^\p{Lu}]*$)) # make sure next char is uppercase letter and further
                          # (?=[^\p{Lu}]*$) makes sure there is no uppercase letter after

Upvotes: 1

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