java 可拆成数组的字符串，去掉重复元素的一种方法

public class MergeString {

    public static void main(String[] args) {
        String str1 = "02,01,03";
        String str2 = "01,03,04";
        String str3 = str1 +","+ str2;
        String[] arr3 = str3.split(",");
        Set<String> set = new HashSet<>();
        for (String string : arr3) {
            set.add(string);
        }
        for (String str : set) {
            System.out.println(str);
        }
    }
}