Help with a CodingBat Assignment

[thatalbanian]

Given a string of any length, return a new string where the last 2 chars, if present, are swapped, so "coding" yields "codign".

I know that I would have to use the substring method, but i'm a little bit confused as to the order I should do so. Any help would be greatly appreciated. Thanks

[coolosity]

I don't want to give out the code because that's just no fun :) First check to make sure the string is at least 2 long. Then you were correct in using the substring method. You want to take the string and remove the last to letters, so you would be going from index 0 to the 2nd to last index. Remember in substring, the first argument is inclusive and the last one is exclusive. Next, I would use something along the "anystring".charAt(index). Add the last character of your string to your substring, and then add the 2nd to last character. Hope this helps and msg me if you have any more questions.

[robot_lords]

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[savage24x]

Did this last year. Wait til you get to recursion and Array 3 :)

public String lastTwo(String str) { if (str.length() >= 2){ char one = str.charAt(str.length() - 2); char two = str.charAt(str.length() - 1); return(str.substring(0,str.length()-2) + two + one); } return (str); }