Set different actions to different list dialog items

I have 3 list within my list dialog but I want each item to do something different when it is clicked. How can I achieve this? I know the code needs to go in the onClick method, but I don't what needs to do so.

        final CharSequence[] items = { "Item 1", "Item 2", "Item 3"};

        AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
        builder.setTitle("Title");
        builder.setItems(items, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int item) {

        }
    }).show();