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Thread: Create new Array from old Array

  1. #1
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    Default Create new Array from old Array


    I have a String array with multiple elements in it and I want to create another String array from it but, I don't want to take all the elements from the first array, theres a criteria for it the strings length.

    So Ive got an array with 10 elements in..
    [1] = Eitens
    [2] = Dietrumpream
    [3] = Formal
    [4] = and
    [5] = Weide
    [6] = Forma
    [7] = Spreorphotes
    [8] = the
    [9] = Bly
    [10] = Coming

    and the new array will have the following conditions, each element cant be longer than 3 characters long, so the second array should be of size 3 with the elements "and","the","bly" and of course in the same order as they were?

    This is what I've to so far:
    int number = 0;
    for (int i = 0; i < S1.length; i++) 
            if (S1[i].length() >= key.length())
        String sorted[] = new String[number];
        int j = 0;
        for(int i = 0; i<S1.length;i++)
            if (S1[i].length() <= key.length()){
                sorted[j] = S1[i];

    Where am I going wrong?
    Last edited by helloworld922; February 24th, 2010 at 12:37 PM.

  2. #2
    Super Moderator helloworld922's Avatar
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    Default Re: Create new Array from old Array

    You're putting the elements into the exact same spot as they were in the original array. What you should be doing is using a separate counter to determine where to put the elements. This won't change the fact that you're array will have a bigger size still. There are two possible solutions: use an ArrayList, which will keep track of the size for you, or re-allocate a third array to the number of elements you want to keep after you've found all of them and transfer them over.

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