Explain JAVA code

Posted by MIW on Stack Overflow See other posts from Stack Overflow or by MIW
Published on 2010-03-20T01:45:54Z Indexed on 2010/03/20 1:51 UTC
Read the original article Hit count: 341

Filed under:

homework

|

mutation

I need some help to explain the meaning from line 5 to line 9. Thanks

String words = "Rain Rain go away";
String mutation1, mutation2, mutation3, mutation4;
mutation1 = words.toUpperCase();
System.out.println ("** " + mutation1 + " Nursery Rhyme **");
mutation1 = words.concat ("\nCome again another day");
mutation2 = "Johnny Johnny wants to play";
mutation3 = mutation2.replace (mutation2.charAt(5), 'i');
mutation4 = mutation3.substring (7, 27);
System.out.print ("\'" + mutation1 + "\n" + mutation4 + "\'\n");

10.System.out.println ("Title length: " + words.length());

© Stack Overflow or respective owner

Related posts about homework

parsing a list and producing a structure of that

as seen on Stack Overflow - Search for 'Stack Overflow'
;; structure representing homework points ;; nr: number - the number of the homework ;; points: number - the number of points reached (define-struct homework (nr points)) ;; parse-homework: (list of number pairs) -> (list of homework) ;; The procedure takes a list of number pairs and produces… >>> More
Scheme homework help

as seen on Stack Overflow - Search for 'Stack Overflow'
Okay so I have started a new language in class. We are learning Scheme and i'm not sure on how to do it. When I say learning a new language, I mean thrown a homework and told to figure it out. A couple of them have got me stumped. My first problem is: Write a Scheme function that returns true (the… >>> More
Unix [Homework]: Get a list of /home/user/ directories in /etc/passwd

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm very new to Unix, and currently taking a class learning the basics of the system and its commands. I'm looking for a single command line to list off all of the user home directories in alphabetical order from the /etc/passwd directory. This applies only to the home directories, and not the contents… >>> More
sequential search homework question

as seen on Stack Overflow - Search for 'Stack Overflow'
Consider a disk file containing 100 records a. How many comparisons would be required on the average to find a record using sequential search, if the record is known to be in the file? I figured out that this is 100/2 = 50. b. If the record has a 68% probability of being in the file, how many comparisons… >>> More
[Homework] Online programming editor

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, For a school project i need to write or use a online programming editor. It is a part of a bigger project. I thought of a java application, php/html/javascript or flash. I have a couple of things i could do: Find a good working application and edit it so it works with the rest of the project Find… >>> More

Related posts about mutation

Why do Lazy Languages not have mutation?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi to everyone, I'm studying about programming language's theory and I can't figure out a solid reason to why lazy languages doesn't have mutation? Does anyone know the reason? >>> More
Why don't lazy languages support mutation?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm studying programming language theory and I can't figure out a solid reason why lazy languages don't have mutation. Anyone know the reason? >>> More
Why not allow mutation of the this binding?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi Everyone, I'm building a interpreter/compiler for a school project (well now its turning into a hobby project) and an instructor warned me not to allow mutation of the 'this' binding (he said it was gross and made a huge deal about it) but I never learned why this is so... dangerous or bad. I'm… >>> More
Mutation Problem - Clojure

as seen on Stack Overflow - Search for 'Stack Overflow'
having trouble changing an element of my function represented as a list. code for random function: (defn makerandomtree-10 [pc maxdepth maxwidth fpx ppx] (if-let [output (if (and (< (rand) fpx) (> maxdepth 0)) (let [head (nth operations (rand-int (count operations))) children… >>> More
mutation...........

as seen on Stack Overflow - Search for 'Stack Overflow'
Hey everybody, I'm kinda confused..... (define m (list 1 2 3 '(5 8))) (let ((l (cdr m))) (set! l '(28 88))) ==>(1 2 3 (5 8)) (define o (list 1 2 3 '(5 8))) (let ((l (cdr o))) (set-car! l '(28 88))) ==> (1 (28 88) 3 (5 8)) Why does (set! l '(28 88))) not update m? >>> More