Igor Kromin |   Consultant. Coder. Blogger. Tinkerer. Gamer.

Varargs in Java are very handy and I've been using this feature quite a bit lately, but I did find some shortfalls that unfortunately mean I have to write some ugly code to get around the limitations.

To recap, there is an explanation of varargs here, but basically all this feature is, is a way to wrap an array of arguments to be passed to a method.

So in my server I can define a method like this:
public static void persist(final Object ... os) {

...and in the calling code use it like this:
persist(obj1, obj2, obj3);

Great so far, but what if I have a number of objects to persist plus an array of variable length that holds more objects to persist? I thought I could do this...
Object objarray[] = ...;
persist(obj1, obj2, obj3, objarray);

Unfortunately that doesn't work because java interprets that as a call to persist(Object[] a, Object[] b).

So how to get around it? Well the only way I could think of was to combine the varargs array and the other array I am passing in. This makes for some messy code before the persist() call so I'm open to other suggestions.


A quick disclaimer...

Although I put in a great effort into researching all the topics I cover, mistakes can happen. Use of any information from my blog posts should be at own risk and I do not hold any liability towards any information misuse or damages caused by following any of my posts.

All content and opinions expressed on this Blog are my own and do not represent the opinions of my employer (Oracle). Use of any information contained in this blog post/article is subject to this disclaimer.
Hi! You can search my blog here ⤵
NOTE: (2022) This Blog is no longer maintained and I will not be answering any emails or comments.

I am now focusing on Atari Gamer.