二维数组所有元素求和输出

public class zuoye2 {

    public static void main(String[] args) {

   int arr [][]={{1,6,56,45,},{6,8,4,6,},{6,9,5,9}};
   int sum=0;
   System.out.println("输出二维数组遍历");
   
  
   for(int[]x:arr)
   {
       for(int y:x)
       {
           System.out.print(y+", ");
           sum+=y;
       }
       System.out.println();
   }
   
   System.out.println("所有元素的和为"+sum);


    }

}