Example with an array of Student objects. Requires Keyboard class.

Student class has private instance variables name, age and gpa which represent data values for individual students. Constuctor

• public Student(String s, int a, double g)  // initializes instance variables in Student object.

Student objects can invoke the following service methods

• public String getName()         // retruns name of a student
• public int getAge()                 // returns age of a student
• public double getGpa()          // retruns gpa of a student
• public void printStudent()       // prints all data (name, age, gpa)  for one student

ArrayOfStudents class has private instance variable x which is an array of Student objects. Array is created to hold at most LIMIT components each one being an object reference refering to a Student type of object. It also has int variable size that corresponds to actual number of students stored in x. The size should never exceed LIMIT.  Finally, there is also a variable gradSize that holds the number of students that are potential graduate students (having  gpa>=3.5).  ArrayOfStudents class has constructor

• ArrayOfStudents()  // initializes size by reading it from the user and creates size student objects again by reading their name, age and gpa from the user.

ArrayOfStudents class also has the following service methods:

• public void printStudentList()                  // prints data for individual students in array x
• public Student[] graduateStudents()   // returns an array with those students from x whose gpa is 3.5 and above.
• public int getGradSize()                     // returns number of potential graduate students

TestArrayOfStudents class has main method. It is designed to test the previous two classes. It creates an object from class ArrayOfStudents, prints student list, creates an array of potential graduate students and prints those students.