Java中set集合

Question

两个集合{"a","b","c","d","e"},{"d","e","f","g","h"}合并成一个集合,并且去掉重复的

Answer 1

Set可以自动去重，所以使用Set直接添加数据就可以。

public static void main(String[] args) {
    List<String> strList1 = new ArrayList<>(Arrays.asList("a", "b", "c", "d", "e"));
    List<String> strList2 = new ArrayList<>(Arrays.asList("d", "e", "f", "g", "h"));
    // 创建set并将strList1集合数据赋给set
    Set<String> set = new HashSet<>(strList1);
    // 将strList2集合合并到set
    for (String str : strList2) {
        set.add(str);
    }
    System.out.println("合并后：" + set);
}