Recursion in Java ..

[Java01]

need help on recursion, i don't know how to add a character into a string. for example:

adding 'a' into position 5 for example.. into the string "bcdefg" so it would go after f.. I know you can use CharAt but all i need is a start, im having trouble starting the code

any help?

[Java01]

any help? i got to have it working within 20 mins!

[Eranga]

What you have done so far, can you show your code here.

[Java01]

i havn't done much, i need help starting it off, i have a few notes here and there.. like :

public String rev3 (String str1, String str2, int num) {
if ((str1.length()) == 0) return str2;

im just really stuck lol, if you can help start me off i can get it hopefully!

[Eranga]

This is not related with recursion. I don't know from where you came with that word.

Here is a simple way to do it.

        String str = "bcdefg";
        str = str.substring(0, 4) + "a" + str.substring(4);
        System.out.println(str);

[Java01]

oh ok, we got taught that way in lectures, we used a method called rev3, recursion but thanks!

[Eranga]

That's why best to use a descriptive name for method defining.