EJ-42 Use Varargs Judiciously

Ref: Effective Java by Joshua Bloch


A simple use of varargs:

	static int sum(int... args) {
	int sum = 0;
	for (int arg : args)
	sum += arg;
	return sum;
	}

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The WRONG way to use varargs to pass one or more arguments

	static int min(int... args) {
	if (args.length == 0)
	throw new IllegalArgumentException("Too few arguments");
	int min = args[0];
	for (int i = 1; i < args.length; i++)
	if (args[i] < min)
	min = args[i];
	return min;
	}

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The right way to use varargs to pass one or more arguments

	static int min(int firstArg, int... remainingArgs) {
	int min = firstArg;
	for (int arg : remainingArgs)
	if (arg < min)
	min = arg;
	return min;
	}

view raw varargs3.java hosted with ❤ by GitHub