Write a simple line editor. Keep the entire text in an ArrayList object, one line in a separate index position. Start the program by entering the EDIT file, after which a prompt appears along with the line number. If the letter I is entered with a number n following it, then insert the text to be followed on line n. If letter I is not followed by a number, then insert the text on the current line. If D is entered with two numbers n and m, one n, or no number following it, then delete lines n through m, line n, or the current line. Do the same with the command L, which stands for listing lines. If A is entered, then append the text to the existing lines. Entry E signifies exit and saving the text in a file. You can use a LinkedList object instead of ArrayList if you want. I need this in JAVA. I know there are answers to this already, but none work correct. Please do not copy and paste an old answer. Below is a sample of the output needed. I need a UML class diagram as well.

EDIT: textin.txt (user inputs textin.txt)

1> The first line

2>

3> And another line

4> I 3

3> The second line

4> One more line

5> L

1> The first line

2>

3> The second line

4> One more line

5> And another line //This is now line 5; not 3;

5> D 2 // line 5, since L was issued from line 5;

4> L //line 4, since one line was deleted;

1> The first line

2> The second line

3> One more line

4> And another line

5> E