2021-10-11 正则表达式(替换)

替换：String replaceAll(String regex, String replacement)

public class 替换 {

    public static void main(String[] args) {

        String str = "das1231354654dasdassa47654456568";
        // 将字符串中的数组替换成#
        replaceAllDemo(str, "\\d{5,}", "#");

        String str1 = "erkkjklasldjyyttrvcbz";
        // 将字符串中的叠词替换成$. //将叠词替换成单个字母 zzzz->z
        replaceAllDemo(str1, "(.)\\1+", "$1");

    }

    public static void replaceAllDemo(String str, String regex, String newStr) {
        str = str.replaceAll(regex, newStr);
        System.out.println(str);
    }

}