public class Test $\{$

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

T t $=$ new T$()$;

swap$($t$)$;

System.out.println$("$e$1="+$ t$.$e$1$

$+"$ e$2="+$ t$.$e$2)$;

$\}$

public static void swap$($T t$)\{$

int temp $=$ t$.$e$1$;

t$.$e$1=$ t$.$e$2$;

t$.$e$2=$ temp;

$\}$

$\}$

class T $\{$

int e$1=1$;

int e$2=2$;

$\}$