$9\mathrm{.}10\mathrm{.}3$ Show the output of the following code:

public class Test $\{$

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

int $[]a=\{1,2\}$;

swap$(a[0],a[1])$;

System.out.println$("$a$[0]="+$ a$[0]$

$\}$

$+a[1]=+a[1]$;

public static void swap$($int $n1,$ int $n2)\{$

int temp $=n1$;

$n1=n2$;

$n2=$ temp;

$\}$

$\}$

public class Test $\{$

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

int $[]a=\{1,2\}$;

swap$(a)$;

System.out.print$1$n$("$a$[0]=+a[0]$

$\}$

$+a[1]=+a[1]$;

public static void swap$($int$[]$ a$)\{$

int temp $=a[0]$;

$a[0]=a[1]$;

$a[1]=$ temp;

$\}$

$\}$

$($b$)$

public class Test $\{$

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

$Tt1=$ new $T()$;

$T$ t$2=$ new $T()$;

System.out.print$1$n$("$t$1\text{'}$s $i=+$

t$1.i+$ and $j=+t1.j$;

System.out.print$1$n$("$t$2\text{'}$s $i=+$

t$2.i+$ and $j=+t2*j$;

$\}$

$\}$

class $T\{$

static int $i=0$;

int $j=0$;

i$++$;

$j=1$;

$\}$

$\}$