定义ref对象类型 type FileStateStatus = { reset?: () => void; fileList?: RcFile[] } export interface FileState { current?: FileStateStatus , } const fileStat
public class Demo04 { public static void main(String[] args) { //定义数组 int[] arr = {1,2,3,4,5}; System.out.println(arr[0]); System.out.println(arr[1]);