JavaʹÓÃListÈ¥ÖصÄËÄÖз½Ê½

package com.lp.util;
 
import java.util.*;
import java.util.stream.Collectors;
 
/**
 * @author liu pei
 * @date 2023Äê12ÔÂ12ÈÕ ÏÂÎç6:54
 * @Description:
 */
public class Test {
    public static void main(String[] args) {
        List<String> str = new ArrayList<>();
        str.add("2");
        str.add("3");
        str.add("9");
        str.add("99");
        str.add("3");
        str.add("8");
        str.add("8");
 
        //ÎÞÐòÈ¥ÖØ
        System.out.println(new HashSet<String>(str));
        //ÓÐÐòÈ¥ÖØ
        System.out.println(new TreeSet<String>(str));
        //ÎÞÐòÈ¥ÖØ
        System.out.println(new LinkedHashSet<String>(str));
        //stream È¥ÖØ
        System.out.println(str.stream().distinct().collect(Collectors.toList()));
    }
}

[99, 2, 3, 8, 9]
[2, 3, 8, 9, 99]
[2, 3, 9, 99, 8]
[2, 3, 9, 99, 8]