Some Memos - tenji/ks GitHub Wiki

备忘录

01. convert int[] into List

Java 16 之前：

int[] ints = {1, 2, 3};
List<Integer> list = Arrays.stream(ints).boxed().collect(Collectors.toList());

Java 16 之后：

List<Integer> list = Arrays.stream(ints).boxed().toList();

02. ArrayList 初始化

匿名内部内进行初始化

List<Integer> list = new ArrayList<Integer>(){{
    add(1);
    add(2);
}};

Arrays.asList

List<Integer> list = Arrays.asList(1, 2);

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