boolean esta = true;
if (arr1 ==null || arr2 == null){
return (arr1 == null && arr2 == null);
}
if (arr1.length ==0 || arr2.length == 0){
return (arr1.length == 0 && arr2.length == 0);
}
if(arr1.length != arr2.length || arr1[0].length != arr2[0].length){
return false;
}
else{
if(arr1[0].length != arr2[0].length){
return false;
}
for(int i = 0; i
esta = false;
}
}
}
return esta;
}
}
为什么判断是否为null和空值的时候需要返回的是:return (arr1 == null && arr2 == null);
和 return (arr1.length == 0 && arr2.length == 0);