Method that accepts String and tokenizes it and puts each word in arraylist and prints in reverse..?

Question

Basically I wrote out the code but I don't know how to write it in reverse. Question asks: Write a method that accepts a String and tokenizes it. put each word into an array and print the array in reverse.

Here's the code

public void tokens(String s)
{
 String tokenArray[] = s.split("X");

 for (String s:tokenArray)
  System.out.println(s);

}  (don't have to do number 8)

new StringBuilder(the_string_variable).reverse().toString() – Mathemats Mar 25 '15 at 00:02 — Mathemats, Mar 25 '15 at 00:02
do you want java for-each reverse? – Esterlinkof Mar 25 '15 at 00:06 — Esterlinkof, Mar 25 '15 at 00:06

score 0 · Accepted Answer · answered Mar 25 '15 at 00:01

0

If I understand correctly, you could use a simple for loop starting at the end of the array like this:

for(int i=tokenArray.length()-1; i>=0; i--)
     System.out.println(tokenArray[i]);

answered Mar 25 '15 at 00:01

DigitalNinja

1,078
9
17

Perfect! Just what I needed. I will accept your answer. Thank you! – Noah Mar 25 '15 at 00:06
@Noah Thanks! Glad to help ;) Hit the little check mark so I get some points! :P – DigitalNinja Mar 25 '15 at 00:07
I got more questions if need any more points so let me know lol – Noah Mar 25 '15 at 00:23
lol, okay well I can probably help you, as you long as you attempt it yourself first, otherwise you won't learn! ;) – DigitalNinja Mar 25 '15 at 00:26

score 0 · Answer 2 · answered Mar 25 '15 at 00:01

0

A for loop can go forward

for ( int i = 0; i < lengthOfSomething; i++ ){....}

and reverse

for ( int i = lengthOfSomething-1; i >= 0; i-- ){...}

answered Mar 25 '15 at 00:01

copeg

8,290
19
28

score 0 · Answer 3 · edited May 23 '17 at 12:28

just use

for( int i = sizeOfTokenArray -1 ; i >= 0 ; i-- )
    System.out.println( tokenArray[i] );

for each

You can also view this page for reverse for-each

recursive functions

you can also use recursive function but not recommended

public static void reversePrint( String [] arges , int index ){
    if( index > arges.length() )
        return;
    reversePrint( arges , ++index );
    System.out.println( arges[ index ] );
}

public static void print( String [] arges , int index ){
    if( index > arges.length() )
        return;
    System.out.println( arges[ index ] );
    print( arges , ++index );
}
// use them
public static void main( String [] arges ){
    print( TokenArray , sizeOfTokenArray );
    reversePrint( TokenArray , 0 );
}

Method that accepts String and tokenizes it and puts each word in arraylist and prints in reverse..?

3 Answers3

for each

recursive functions