关于java数组输出的问题

Question

public class Arraysanwei
{
public static void main(String [] args)
{
int num[][][]={{{53,45,234,1},{6234,34,34,7},{34,23,123,34}},{{56,34,3,2},

{9,3,6,4},{8,5,5,3}}};
int i,j,k,sum=0;
System.out.print("三维数组：");
for( i=0;i<num.length;i++)
{
for(j=0;j<num[i].length;j++)
{
for(k=0;k<num[j].length;k++)
{
System.out.print(num[i][j][k]+" ");
sum+=num[i][j][k];
}
}
}
System.out.println();
System.out.println("三维数组和："+sum);
}
}

怎么说有异常？![图片说明](https://img-ask.csdn.net/upload/201510/28/1445961765_727316.png)

Answer 1

 for(k=0;k<num[i][j].length;k++)