java如何定义一个长度为n的数组

Question

n从键盘输入

Answer 1

Scanner scan = new Scanner(System.in);
int i = scan.nextInt();
int[] a = new int[i];本回答被提问者采纳

Answer 2

int n = 0; // n 从键盘输入

int[] arr = new int[n]; //数组为长度输入