- System.arraycopy(arrays[i], 0, newArray, appendIndex, arrays[i].length);
- appendIndex += arrays[i].length;
- }
+ if (arrays.length == 0)
+ throw new IllegalArgumentException("Cannot concatenate 0 arrays.");
+
+ int length = 0;
+ for (T[] array : arrays)
+ length += array.length;
+
+ T[] newArray = Arrays.copyOf(arrays[0], length);
+ int appendIndex = arrays[0].length;
+ for (int i = 1; i < arrays.length; i++)
+ {
+ System.arraycopy(arrays[i], 0, newArray, appendIndex, arrays[i].length);
+ appendIndex += arrays[i].length;
+ }