Please do not use char/charAt or arrays The method longestStreak is intended to determine the longest substring of consecutive identical characters in the parameter str and print the result.

For example, the call longestStreak("CCTTT!") should print the result "A 5" because the longest substring of consecutive identical characters is "".

Complete the method below. Your implementation should conform to the example above.

public static void longestStreak(String str)

8. create an abstract student class for parker university. the class contains fields for student id number, last name, and annual tuition. include a constructor that requires parameters for the id number and name. include get and set methods for each field; the settuition() method is abstract. create three student subclasses named undergraduatestudent, graduatestudent, and studentatlarge, each with a unique settuition() method. tuition for an undergraduatestudent is $4,000 per semester, tuition for a graduatestudent is $6,000 per semester, and tuition for a studentatlarge is $2,000 per semester. write an application that creates an array of at least six objects to demonstrate how the methods work for objects for each student type. save the files as student.java, undergraduatestudent.java, graduatestudent.java, studentatlarge.java, and studentdemo.java.