class Box $\{$ public int size; public Box$($int size$)\{$ this.size $=$ size; $\}$ public void increaseSize$($int increment$)\{$ this.size $+=$ increment; $\}\}...$Box box$1=$ new Box$(8),$ box$2=$ new Box$(8)$;box$1=$ box$2$; box$2.$increaseSize$(4)$; System.out.println$($box$1.$size$)$;