java - 如何用空对象填充字符串数组？

Question

因此，我创建了一个用于保存 cd 集合的数组。唯一的问题是最大数组大小为 50，如果有 50 个对象，如何用空对象填充数组？:

public static void main(String[] args) throws IOException 
  {
    final int MAX_ARRAY_SIZE = 50;
    final String FILENAME = "Collection.txt";

    CDOutput out = new CDOutput();
    CDInput in = new CDInput();

    int count = 0;  // Counter to keep track of number of elements in the array
    int choice = 0; // Menu choice

    String[] songArray = new String[MAX_ARRAY_SIZE]; // Create array to hold song collection

    {
    songArray[0] = new String("");// Fill array with empty objects ????????
    songArray[1] = new String("");
    songArray[2] = new String("");
    songArray[3] = new String("");
    songArray[4] = new String("");
    songArray[5] = new String("");
    songArray[6] = new String("");
    songArray[6] = new String("");
    songArray[7] = new String("");
    songArray[8] = new String("");
    songArray[9] = new String("");
    songArray[10] = new String("");
    songArray[11] = new String("");
    songArray[12] = new String("");
    songArray[13] = new String("");
    songArray[14] = new String("");
    songArray[15] = new String("");
    songArray[16] = new String("");
    songArray[17] = new String("");
    songArray[18] = new String(""); //and so on......
    }

我知道这不可能是正确的......

编辑(事后看来这确实很容易):

String[] songArray = new String[50];
for (int i = 0; i < 50; i++)
    songArray[i] = new String("");

Answer 1

Arrays.fill() 也许可以帮助你:http://docs.oracle.com/javase/7/docs/api/java/util/Arrays.html

此外，如果您使用 Apache Commons Lang，则可以使用 ArrayUtils.nulltoEmpty()