這是為了實現去除字符串中重復字符的功能public class MaxStringLength {public static void main(String[] args) {String s="abcabcb";//答案為3int size = 0;String req = "(?d)(.)(?=.*\\1)";s=s.replaceAll(req, "");for(int i= 0;i < s.length();i++){size += 1;System.out.print(s.charAt(i));}System.out.println();System.out.println(size);}}
請詳細講解一下java正則表達式(?d)(.)(?=.*\\1)？
慕工程0101907
2018-10-28 13:09:14
