将package shiyan3; public class Test { public static void main(String[] args) { try { Student student = new Student("Alice", "123456", "Computer Science"); System.out.println("Student name: " + student.getUsername()); System.out.println("Student password: " + student.getPassword()); System.out.println("Student major: " + student.getMajor()); Teacher teacher = new Teacher("Bob", "123456", "Mathematics"); System.out.println("Teacher name: " + teacher.getUsername()); System.out.println("Teacher password: " + teacher.getPassword()); System.out.println("Teacher department: " + teacher.getDepartment()); Admin admin = new Admin("Charlie", "123456", "Director"); System.out.println("Admin name: " + admin.getUsername()); System.out.println("Admin password: " + admin.getPassword()); System.out.println("Admin position: " + admin.getPosition()); } catch (Exception e) { System.out.println("An error occurred: " + e.getMessage()); } } }修改这段代码，使他有键盘输入的值

以下是修改后的代码，使用了Scanner类来获取键盘输入的值：

package shiyan3;

import java.util.Scanner;

public class Test {
    public static void main(String[] args) {
        try {
            Scanner scanner = new Scanner(System.in);

            System.out.print("Enter student name: ");
            String studentName = scanner.nextLine();

            System.out.print("Enter student password: ");
            String studentPassword = scanner.nextLine();

            System.out.print("Enter student major: ");
            String studentMajor = scanner.nextLine();

            Student student = new Student(studentName, studentPassword, studentMajor);
            System.out.println("Student name: " + student.getUsername());
            System.out.println("Student password: " + student.getPassword());
            System.out.println("Student major: " + student.getMajor());

            System.out.print("\nEnter teacher name: ");
            String teacherName = scanner.nextLine();

            System.out.print("Enter teacher password: ");
            String teacherPassword = scanner.nextLine();

            System.out.print("Enter teacher department: ");
            String teacherDepartment = scanner.nextLine();

            Teacher teacher = new Teacher(teacherName, teacherPassword, teacherDepartment);
            System.out.println("Teacher name: " + teacher.getUsername());
            System.out.println("Teacher password: " + teacher.getPassword());
            System.out.println("Teacher department: " + teacher.getDepartment());

            System.out.print("\nEnter admin name: ");
            String adminName = scanner.nextLine();

            System.out.print("Enter admin password: ");
            String adminPassword = scanner.nextLine();

            System.out.print("Enter admin position: ");
            String adminPosition = scanner.nextLine();

            Admin admin = new Admin(adminName, adminPassword, adminPosition);
            System.out.println("Admin name: " + admin.getUsername());
            System.out.println("Admin password: " + admin.getPassword());
            System.out.println("Admin position: " + admin.getPosition());

            scanner.close();
        } catch (Exception e) {
            System.out.println("An error occurred: " + e.getMessage());
        }
    }
}