without using String builder

Write a java program that generates random string called str of $10$ characters from the English alphabet $($lower and upper caseyand then create a new string commstr containing all common, distinct and case sensitive characters from your First name and str$.$

Note:

Your first name should be stored in a string variable called fName in main method.

Ordering the common letters based on their appearance in the fName.

The program should display:

The string str$.$

Your first name

The longest sequence commStr.

Example:

Suppose the generated random String is "AmedMoXMha"

Name is "Mohamed"

Output:

$Str=$ AmedMoxMha

Name $=$ Mohamed

commStr $=$ Mohamed