Java - How to cast BigInteger set to BigInteger array

Question

I have the following code:

public static BigInteger[] Cubes (int m){
    Set<BigInteger> result = new HashSet<BigInteger>();

    for (int i = 1;; i++){
        BigInteger check = BigInteger.valueOf(i).pow(3);
        if (String.valueOf(check).length() == m){
            result.add(check);
        }
        if (String.valueOf(check).length() > m) break;
    }

    // I now have a BigInteger set containing all my values. 
   // I need to cast this to a BigInteger[] over here.
   // Then, I can return a BigInteger array.

}

What is the most efficient way to achieve this?

Tim Biegeleisen · Accepted Answer · 2016-06-02 06:34:59Z

3

You can try using the Java Collections toArray() method:

BigInteger[] output = result.toArray(new BigInteger[result.size()]);

answered Jun 2, 2016 at 6:34

Tim Biegeleisen

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1 Comment

Thev Over a year ago

I had actually tried something similiar, but I forgot to add the () after .size

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