Level Up - Java: What is Vararg?

I like to remember vararg as "variable-length arguments". You may see them parameterized as "foo(Object... objects)" or "foo(int... ints)" or maybe "main(String... args)". The triple-dot signifies the vararg, and the method that has them uses it as an array.

Example code:

/** Returns input as a comma-separated list. If input if null

  * or empty, then this returns an empty string. */

public static String convertToString(Object... objects) {

    if (objects == null || objects.length == 0) { return ""; }

    StringBuilder sb = new StringBuilder();

    for (Object object : objects) {

        sb.append(object.toString()).append(", ");

    }

   return sb.substring(0, sb.length() - 2).

}

More info: https://docs.oracle.com/javase/1.5.0/docs/guide/language/varargs.html

~ Danial Goodwin ~

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