import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.ArrayUtil;

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

public class TableTest {

    public static void main(String[] args) {


        List<String> list=new ArrayList<>();
        list.add("1");
        list.add("1");
        list.add("2");

        list=list.stream().distinct().collect(Collectors.toList());
        for (String s : list) {
            System.out.println(s);
        }
    }


}