What exception type$($s$)$ do the following program segments throw, if any? Explain the difference.

I.

public class Test $\{$

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

Object o $=$ null;

System.out.println$($o$.$toString$())$;

$\}$

$\}$

II$.$

public class Test $\{$

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

Object o $=$ null;

System.out.println$($o$)$;

$\}$

$\}$