The StringBuilder class is provided in the Java library. Provide your own implementation (name the new class MyStringBuilder2) with three data fields, array of characters, size, capacity, and the following methods:

 public MyStringBuilder2(String s);

 public MyStringBuilder2 append(MyStringBuilder2 s); 4 points

 public int length();

 public char charAt(int index);

 public MyStringBuilder2 toLowerCase();

 public MyStringBuilder2 substring(int begin, int end); 2 points

*Do not use any method from String, StringBuilder, or StringBuffer

In the lab, which of the following displayed a list of all installed services and included a description of the service, the current state, and whether the service started automatically or manually? a. the services manager b. the applications summary c. the recommended services d. list the safe services list

Jake really works well with numbers and is skilled with computers but doesn't work well with others. which of the jobs discussed in this unit might be best for jake? why?

Write a grading program for a class with the following grading policies: a. there are two quizzes, each graded on the basis of 10 points. b. there is one midterm exam and one final exam, each graded on the basis of 100 points. c. the final exam counts for 50% of the grade, the midterm counts for 25%, and the two quizzes together count for a total of 25%. (do not forget to normalize the quiz scores. they should be converted to a percentage before they are averaged in.) any grade of 90 or more is an a, any grade of 80 or more (but less than 90) is a b, any grade of 70 or more (but less than 80) is a c, any grade of 60 or more (but less than 70) is a d, and any grade below 60 is an f. the program will read in the student’s scores and output the student’s record, which consists of two quiz and two exam scores as well as the student’s average numeric score for the entire course and final letter grade. define and use a structure for the student reco