Thread: Array Problem

int [] oddNumbers = {1,3,5,7,9};


oddNumbers[0]=oddNumbers[1];
oddNumbers[1]=oddNumbers[2];
oddNumbers[2]=oddNumbers[3];
oddNumbers[3]=oddNumbers[4];

This would result in : int [] oddNumbers = {3,5,7,9,9} i.e replacing each element in the array( starting at index 0) with the element to its immediate right in the array.


To achieve the result with a for loop I have tried:

for (int i = 0; i <= oddNumbers.length ;i++)
oddNumbers[i] = oddNumbers[i + 1];

I get the following error:
Exception: line 2. java.lang.ArrayIndexOutOfBoundsException

Any thoughts would be gratefully received.

Exception: line 2. java.lang.ArrayIndexOutOfBoundsException

Did the error message give the value of the index that was out of bounds?
Was the value 5?

Remember the maximum index of an array is the array.length -1;
What does your for loop allow the index to increment to?

The value of the index was not given in the error. The penny dropped with the maximum index of the array.length - 1 ,as the first index is 0. Thankyou.

for(int i = 0; i < oddNumbers.length -1;i++)
oddNumbers[i] = oddNumbers[i + 1];

Gives a result :int [] oddNumbers = {9,9,9,9,9}

What have I missed?

How are you printing out the results?
I get:
System.out.println("oddNumbers=" + Arrays.toString(oddNumbers)); // oddNumbers=[5, 7, 9, 9, 9]

I get the required output.

Thank you Norm.

av8