数组

有两种方式表示

int a[]=new int[10];  //10个数，int类型，为动态初始化
int [] a=new int[10];
Sting s[]={"1","2","3","4","5"}//直接输入也可,为静态初始化
Sting [] s={"1","2","3","4","5"}

二维 根据[][]的数量即可确定
三维[][][]

数组长度为a.length