Java程序，字符串

Question

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Answer 1

这可以通过使用正则表达式(\\w)\\1+来解决

public class RemoveReplicateLetter {

    public static void main(String[] args) {
        //For input: boooooob
        System.out.println(removeReplicateLetter("boooooob"));
        //For input: boobaabbiibbuuuuub
        System.out.println(removeReplicateLetter("boobaabbiibbuuuuub"));
    }

    public static String removeReplicateLetter(String word) {
        /*
         REGEX: 
         (\\w)\\1+ 
         - \\w  : matches any word character (letter, digit, or underscore)
         - \\1+ : matches whatever was in the first set of parentheses, one or more times.
         */
        return word.replaceAll("(\\w)\\1+", "$1");
        //Here $1 means return letter with match in word by regex.
    }
}

输出:

bob
bobabibub