public class examples

$\{$

public static void main$($String args$[])$

$\{$

practice one $=$ new practice$()$;

practice two $=$ new practice$()$;

one.number $=8$;

two.number $=5$;

one.work$($two$)$;

System.out.println$($practice$.$calc$($one$,$ two$))$;

$\}$

$\}$

class practice

$\{$

int number;

public void work$($practice p$)$

$\{$

this.number $+=$ p$.$number$++$;

$\}$

public static int calc$($practice p$,$ practice p$2)$

$\{$

return p$.$number $+$ p$2.$number;

$\}$

$\}$