java - java中如何将字符串从一个数组转移到另一个数组？

Question

我有两个数组，一个称为单词，另一个称为数据。我无法将字符串从数据转换为单词。到目前为止我已经

    public String[] shiftRightX(String[] words, String[] data)
    {

        for(int i= words.length - 1; i>0; i--)
        {
            words[i]=words[i-1];
            for (int x = 0; x < data.length; x++)
            {
                words [0] = data[x];
            }
        }  
        return words;  
    }

它应该产生这样的结果:

    shiftRightX({"1", "2", "3"}, {"1", "2"}) → {"2", "1", "1"}
    shiftRightX({"1", "2", "3"}, {"1"}) → {"1", "1", "2"}
    shiftRightX({"1", "2"}, {"1", "2"}) → {"2", "1"}

但是，它最后会额外移动一次。

Answer 1

更快的版本:

public String[] shiftRightX(String[] words, String[] data)
{
  if (data.length < words.length)
     System.arraycopy(words, 0, words, data.length, words.length - data.length);
  for (int i = Math.max(0, data.length - words.length); i < data.length; i++)
     words[data.length - i - 1] = data[i];
  return words;
}