Solution must have java language and add comments. Suppose you are given the following code:

class FooBar $\{$

public void foo$()\{$

for $($int i $=0$; i $<$ n; i$++)\{$

print$("$foo$")$;

$\}$

$\}$

public void bar$()\{$

for $($int i $=0$; i $<$ n; i$++)\{$

print$("$bar$")$;

$\}$

$\}$

$\}$

The same instance of FooBar will be passed to two different threads:

thread A will call foo$(),$ while

thread B will call bar$().$

Modify the given program to output "foobar" n times.

Example $1$:

Input: n $=1$

Output: "foobar"

Explanation: There are two threads being fired asynchronously. One of them calls foo$(),$ while the other calls bar$().$

"foobar" is being output $1$ time.

Example $2$:

Input: n $=2$

Output: "foobarfoobar"

Explanation: "foobar" is being output $2$ times.

Constraints:

$1<=$ n $<=1000$