[不同类型数组复制] 数组复制#不同类型数组复制#Java#Array

ArrayCopy.java

  public static Object goodCopyOf(Object a, int newLength) 
   {
      Class cl = a.getClass();
      if (!cl.isArray()) return null;
      Class componentType = cl.getComponentType();
      int length = Array.getLength(a);
      Object newArray = Array.newInstance(componentType, newLength);
      System.arraycopy(a, 0, newArray, 0, Math.min(length, newLength));
      return newArray;
   }