split vs substring

[fahad siddiqui]

Which would give me a better performance advantage?
for substring, i would be first checking the indexOf and then subtringing in 2 parts.

The string would break to a max of 2 parts.

[Jeanne Boyarsky]

Neither is likely to be time consuming enough to be a bottleneck. Go with the one that is clearer and easier to maintain - in this case split().

[rajesh bala]

split() internally creates Pattern.compile which is an expensive operation. so I would say, use split() in an efficient way. Or use Pattern.compile(regex).split(this, limit); directly.

~Rajesh.B

[Ilja Preuss]

I'm with Jeanne here - simply use split() until it is proven to be a bottleneck for you application.

[rajesh bala]

FYI...

This is the snippet from String.java.

public String[] split(String regex, int limit) {
return Pattern.compile(regex).split(this, limit);
}

If you already know what you are trying to split, its always better to compile the regex and compile the pattern only once.

~Rajesh.B