Question

Suppose that you have the following vector objects:

studentLastName = ["Smith", "Shue", "Cox", "Jordan"]

studentFirstName = ["James", "Sherly", "Chris", "Eliot"]

a. Write a Java statement that outputs the first name of the third student

b. Write a Java statement that outputs the last name of the second student

c. Write a Java statement that outputs the first name followed by the last name separated by a single blank space of the first student

d. Write the necessary Java statements so that the first name and last name of Eliot Jordan are interchanged.

e. Write a Java statement that changes the names James Smith and Sherly Shue to Sherly Smith and James Shue

By changing the vector object studentLastName

By changing the vector studentFirstName

f. Write a for loop that prints all the students" names.

Answer 1

Below are the required Java statements:

        // a. first name of the third student
        System.out.println(studentFirstName.get(2));

        // b. last name of second student
        System.out.println(studentLastName.get(1));

        // c. first name, last name of first student
        System.out.println(studentFirstName.get(0) + " " + studentLastName.get(0));

        // d. interchange first name and last name of Eliot Jordan
        String temp = studentFirstName.get(3);
        studentFirstName.set(3, studentLastName.get(3));
        studentLastName.set(3, temp);

        // e. change the names James Smith and Sherly Shue to Sherly Smith and James Shue
        String temp2 = studentFirstName.get(0);
        studentFirstName.set(0, studentFirstName.get(1));
        studentFirstName.set(1, temp2);

        // f. print all student names
        for (int i = 0; i < studentFirstName.size(); i++) {
            System.out.println(studentFirstName.get(i) + " " + studentLastName.get(i));
        }

Below is the output:

This completes the requirement. Let me know if you have any questions.

Thanks!