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So let say I have an array of size 10 with index range from 0 to 9.
I add a bunch of elements in and stop adding at index 6. So with array.length, I can know that the size of the array is 10, but how do I find which index contain the last value and after that is empty? Am I suppose to do a loop and stop at index == null?
I mimic an arraylist by create a dynamic array that grow when the size is full.
Arg, forgot to tell you guys, if the array is int, then the empty slots will be 0?
Use
java.util.ArrayList. There you no need to think about index and it is resizable-array implementation.At the time of array creation by default all values are null so if you do not insert any value at any index (may be at end or beginning or middle of array) it would be just null. So you should put null check to verify.