Question

Java 怎么去掉字符串中的重复数据

Java 怎么去掉字符串中的重复数据String a="06-104,07-104,06-104,07-104,03-103,04-103,03-103,04-103,05-102,";

怎么去掉重复的，然后打印出来是
06-104,07-104,03-103,04-103,05-102

Answer 1

  import java.util.*;
  class This {

public static void main(String[] args) {
String a="06-104,07-104,06-104,07-104,03-103,04-103,03-103,04-103,05-102,";
a = a.replaceAll("^,*|,*$",",");
String reg = "(,[^,]+,).*\\1+";
while(a.matches("^.*" + reg + ".*$")){
    a = a.replaceAll(reg,"$1");
}
a = a.replaceAll("^,+|,+$","");
System.out.println(a);
}

}

追问

正解！而且顺序不变

Answer 2

放在set数组里面