Behaviour of Java String.split() when some answers are the empty string

Can you guess the output of this program?

class SplitTest
{
    static void split( String s )
    {
        System.out.println( s.split( ";" ).length );
    }

    public static void main( String[] args )
    {
        split("");
        split(";");
        split("x;");
        split(";y");
    }
}

Here it is:

$ javac SplitTest.java && java SplitTest
1
0
1
2

Wow. Docs: String.split.

Side note: It’s not easy to fit Java examples into tweets.

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