# Works on eclipse out of bounds via submission

• ``````    public int[] plusOne(int[] digits) {
res = new int[digits.length];
StringBuilder sb = new StringBuilder();
for (int i : digits) {
sb.append(i);
}
String intermediateString = sb.toString();
System.out.println("=>" +  intermediateString );
Integer val = Integer.valueOf( intermediateString  );
Integer plusOne = val + 1;
char[] almostThere = String.valueOf( plusOne ).toCharArray();
for (int i = 0; i < almostThere.length; i++) {
res[i ] = Integer.valueOf( Character.valueOf( almostThere[i]).toString() );
}

return res;
}``````

• Try testing it with the number 9 passed in. res is defined as having length equal to the length of the input string, so when the number gains a place, almostThere.length is 1 greater than res.length. That means that when i reaches almostThere.length-1, it tries to insert that index. This is res[res.length], which is an out of bounds error.

• revised but still no luck

import org.omg.CORBA.OMGVMCID;

public class NumDigitsPlus1 {
public static class Solution {

``````	public Solution () {

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

StringBuilder sb = new StringBuilder();
for (int i : digits) {
sb.append(i);
}
String intermediateString = sb.toString();
System.out.println("=>" +  intermediateString );
BigInteger val = new BigInteger( intermediateString );

BigInteger plusOne = val.add( new BigInteger("1") );
char[] almostThere = String.valueOf( plusOne ).toCharArray();
int[] res = new int[ almostThere.length ];
for (int i = 0; i < almostThere.length; i++) {
res[i ] = Integer.valueOf( Character.valueOf( almostThere[i]).toString() );
}

return res;
}
}``````

• Still the same error? Or just not being accepted? If same error, make sure you've deleted the print statement.

• its a different error now, this time it says wrong result. when I pass an input of [0] on eclipse I get a single element int array back with 1 but the OJ says the code returns [0]

• It sounds like you're printing intermediateString somewhere. I've run your program and it seems to work, so I think you have that print happening. Leetcode takes the first output you provide, so prints take precedence over returned values.

• that was it, sorry didnt realise how OJ interprets the answer.

• any ideas on how to make this code better? how about the big O of this solution, it seems m*n it me since i am iterating over digits a few times

• This really should be a different question, not an answer to your current question. Make sure to describe your algorithm, and some ideas for how to improve it.

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