Can you help me write a java code for the following:

$1.$ write a java code that would display a given charater $10$ times

$2.$ write a for loop that would calcualte the factorial of $7$

$3.$ write a while loop that would display the integers between $1$ and $25.($Hint: start with int x equal to $1,$ while x is less than or equal to $26)$

$4.$ write a while loop that would test if a given integer is a prime $($Hint: a number $\text{'}$a$\text{'}$ divisible by $\text{'}$b$\text{'}$ will have a$\%$b equal to zero$)$