Method implementation

[kathyla18]

hi i wanted to know how can i implement the following methods



public String reverse(String string) - a method that will recursively take the String received, reverse its characters, and return the reversed String. You may only use the methods charAt, concat, and length from the class String. You may create as many helper methods as you need.


for this method this is what i have

import java.util.Scanner;

public class P5{

public static void main (String[] args){

Scanner scanner = new Scanner (System.in);

System.out.println("Enter text to reverse: ");
String string = scanner.nextLine();
System.out.print(reverse(string));

}


public static String reverse(String string){

if (string.length() == 1){
return string;
}

else{

return reverse(string.substring(1)) + string.charAt(0);

}
}


}

i did it with the substring method but im not supposed to use i dont how to change it to use only the other methods

public String reverse(String string, int start, int end) - a method that will recursively take the String received, reverse the characters within substring specified, and return the new String containing the reversed subset (the non-reversed and reversed portions together). You may only use the methods charAt, concat, and length from the class String. You may create as many helper methods as you need.

[emceenugget]

in order to implement this, you must try. (and in order for us to help you, we need a specific problem)

[Eranga]

kathyla18, how long you are working on Java. Do you know about method/constructor declarations in Java?

Defining Method Java

[fonso gfx]

@kathyla18

I advise you take read more about the "StringBuffer" class and method " reverse()" which is very easy to implement .

[mtyoung]

@fonso gfx

only use the methods charAt, concat, and length from the class String.

[fonso gfx]

@mtyoung
I know, but the problem is that it will be more difficult to write the program.

[mtyoung]

in general, do not following instruction, deduct some of marks or zero mark

use reverse, mean do nothing, java do it for you...
when studying, it is important to implement something by ourselves, just like we may implement linked List in learning instead of direct using ArrayList Class

recursive function just like for/while loop
first try to use for loop to implement method reverse(String string)