Java: Int Array, measure the length of the array element

In Java. Let's say you're given the following Array. Or something similar

int[] anArray = {10, 20, 30, 40, 1000};

Is there a way to take the length of the array element at anArra开发者_如何学Cy[4]; ?

I need to know if the array[x] is == 4. As in 2004, or 1000, or 1968.

How can i do this?

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You can convert the element to a string and get the length of the string, or if its integers you can test if it's between 1000 and 9999.

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Convert your array object to string and check is length :

anArray[x].toString().length

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You could convert the element to a string and then find the length of the string.

You could also use repeated division by 10 in a while loop to find your answer.

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if (Integer.toString(anArray[x]).length() == 4) {
    // it's 4 long
}

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Slightly geekier approach:

int lengthOfElement4 = (int) Math.floor((Math.log(anArray[4]) / Math.log(10) + 1);

@Mark's second option will probably be quicker though...