Java--recursive static method Question?

Question

Consider the following recursive static method:

  public static String scramble( String s ) 
  { 
    int n = s.length(); 
    if ( n < 2 ) 
      return s; 

    if ( n % 2 == 0 ) 
      return s.substring( 0, 1 ) + scramble ( s.substring( 1 ) ); 
    else 
      return scramble( s.substring( 1 ) ) + s.substring( 0, 1 ); 
  } 
What is the output when the statement:

System.out.println( scramble( "all shook up" ) );

is executed?

I believe that the result would be "alsokup oh l"

Since I don't have Java installed on my laptop, there's no way for me to make sure of the result.

SpicyKiwi · Accepted Answer

You're correct, I tried your program and it displays "alsokup oh l".
Good work, happy learning :)

? · Answer

Hey, xxabmxx

It looks like you've been getting some good answers in this forum, and everybody's happy to help. That's what Yahoo! Answers is all about!

But I hope you don't mind if I make a suggestion:

You seem to be doing well in your Java class -- your code has been pretty much correct so far. Most of your questions have simply been to ask for verification, because you don't have Java installed on your laptop.

So I think it will be easier and faster for you to complete these projects if you actually do install the JDK, along with a Java IDE. It's free, and there are many good IDEs out there. 

For example, you might consider NetBeans or Eclipse (check out the links below). But there are other good options, too.

As I say, they're free and I can't think of any reason not to have them installed on your machine! Good luck.

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Java--recursive static method Question?

2 Answers