$7.$ Consider the following code where a String variable is passed to a method. The method changes the

value of its parameter then returns. Is the String changed when you return from the method call? If not,

why not?

String str$1=$ "Hello";

changeString$($str$1)$;

System.out.println$($str$1)$;

$...$

public void changeString$($String str$1)$

$\{$

str$1=$"Goodbye";

$\}$

$8.$ Consider the following code where a reference to a Button object is passed to a method. The method

changes the label of the button then returns. Is the Label of the Button changed when you return from

the method call? If not, why not?

JButton btn$1=$new JButton$("$Hello$")$;

changeLabel$($btn$1)$;

System.out.println$($btn$1.$getText$())$;

$...$

public void changeLabel$($JButton btn$1)$

$\{$

btn$1.$setText$("$Goodbye$")$;

$\}$

$9.$ The following code produces an exception. What would you do to fix it$?$

String$[]$ array$1$;

array$1[0]=$"Hello";

array$1[1]=$"Goodbye";