public class Solution {

public int[] plusOne(int[] digits) {

```
int carry=0;
int length = digits.length;
//对最后一位进行加一操作
int sum = 0;
//对sum进行判断
int[] res = new int [length+1];
for(int i=0;i<length;i++)
{
if(i == 0)
{
sum = digits[length-1-i]+1+carry;
}
else
{
sum = digits[length-1-i]+carry;
}
res[length-i] = sum%10;
carry = sum/10;
}
res[0] = carry;
if(res[0] == 0)
{
int [] ress = new int [length];
for(int j=1;j<length+1;j++)
{
ress[j-1] = res[j];
}
return ress;
}
return res;
}
```

}