二维数组

静态初始化

动态初始化

练习 

public class test1 {public static void main(String[]args){int arr[][]={{22,66,44},{77,33,88},{25,45,65},{11,66,99}};int sum=0;for(int i=0;i<arr.length;i++){int a=0;for(int j=0;j<arr[i].length;j++){sum+=arr[i][j];a+=arr[i][j];}System.out.println("第"+(i+1)+"季度的总营业额是"+a);}System.out.println("全年的总营业额是"+sum);}
}