I find some bug at "Simple text encryption and decryption" program

Question

Hellow everybody. I find some bug at "Simple text encryption and decryption" program posted by SoloLearn. If you try to change "This is awesome" to String text="____"; for instance the code generates ArrayIndexOutOfBoundsException. In case of String text ="\"\"\"'; the string is ofset only with 4, no 5. This is true about all symbols in the end of tample array.
I thing the loop at row 38 must be change from
if (j <= chars.length - offset) {
to
if (j < chars.length - offset) {
and most immportant the encrypting formula at row 45
plain[i] = chars[j - (chars.length - offset + 1)];
to
plain[i] = chars[j - (chars.length - offset )];
and correspondly the decrypting formula at row 62 from
cipher[i] = chars[(chars.length - offset +1) + j];
to
cipher[i] = chars[(chars.length - offset ) + j];
These changes fix the problem in my view.
Sorry for my not fulent english, I hope that SoloLearn will answer here.

Answer 1

You are a good Bug Hunter

Answer 2

You are a good Bug Hunter

Answer 3

You are a good Bug Hunter