java - How to concatenate Images? -

java - How to concatenate Images? -

this should lastly post of 3 made personal project (*)

the other 2 can acess these links(**) :

java screen capture app - how to? select, re-create , paste images (is here):

@yohaneskhosiawan许先汉 gave me advice. said me should utilize list of rectangles store selected images , when pressed (ok) button programme concatenate in single horizontal line (at same file). had new idea: create new button when pressed starts save nexts rectangles (images) in lists , when pressed [ (ok) button or button 1 time again ] programme concatenate file under first horizontal line (all @ same file).

i think i'll have compare heigth of images of horizontal line above. illustration first image of horizontal line below drawimage(img, 0, biggest_height, null);

i tried declare list on tradicional way didnt work because has limited length. tried utilize code:

arraylist<rectangle> al = new arraylist<rectangle>(); al.add(new rectangle(x, y, w, h));

but didn't work again. why ? how can create ?

(*) project help me study. study @ public highschool in sao paulo, brazil. school dont have books have download mines (pdf). app help me resume text-book.

(**) have @madprogrammer back upwards beggining. credits of app goes him , @yohaneskhosiawan许先汉

java image list compare concatenation