public class ArrayDemo{

	public static void main(String[] args){

		//数组的定义  数据类型[] 数组名 = new 数据类型[数组个数]

		//第一种

		int[] arrInt0 = new int[5];

		System.out.println(arrInt0.length);//打印出数组的个数

		//第二种

		int[] arrInt1 = new int[]{1, 2, 3};

		System.out.println(arrInt1.length);

		//第三种

		int[] arrInt2 = {1, 2, 4, 6};

		System.out.println(arrInt2.length);

		//=======================================================

		//数组的取值

		int num = arrInt0[2];

		System.out.println(num);

		//=======================================================

		//数组的赋值

		arrInt0[2] = 8;

		System.out.println(arrInt0[2]);

	}

}