Question

编写Java程序，在每个紧挨着的重复字母之间插入“＃”。例如给定以下字符串“ Hello world”，输出应为“ Hel＃lo world”

    String str = "Hello java world";

    char a = '#';

    for (int i=0; i<str.length(); i++ ) {
            if (str.charAt(i) == str.charAt(i+1)){
                String temp = str + a;
                System.out.println(temp);
            }
    }

Answer 1

好吧，您可以尝试：

示例1：使用REGEX

public static void main(String[] args) {
        String text = "Hello worlld this is someething cool!";
        //add # between all double letters
        String processingOfText = text.replaceAll("(\\w)\\1", "$1#$1");
        System.out.println(processingOfText);

    }

示例2：使用字符串操作

public static void main(String[] args) {
        String text = "Hello worlld this is someething cool!";
        for (int i = 1; i < text.length(); i++) 
        {
            if (text.charAt(i) == text.charAt(i - 1)) 
            {
                text = text.substring(0, i) + "#" + text.substring(i, text.length());
            }
        }
        System.out.println(text);

    }

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java，在字符串中的重复字符之间插入

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