Java - 如何將BigInteger設置為BigInteger數組

Question

我有以下代碼：

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.

}

實現這一目標的最有效方法是什么？

Answer 1

您可以嘗試使用Java Collections toArray（）方法 ：

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