小编use*_*873的帖子

public class StudentTest{

  public static void main(String args[]){

    UnderGrad uG1 = new UnderGrad();
    uG1.setName("John");
    uG1.setMatric("0192345");

    System.out.println("Undergarduate Student Info");
    uG1.setCourse(new Course("CS1103",3));
    uG1.setCourse(new Course("IT4504",3));
    uG1.displayStudentInfo();

    System.out.println(" ");

    PostGrad pG1 = new PostGrad();
    pG1.setName("Sam");
    pG1.setMatric("G015466");
    pG1.setResearch("Empirical Software Engineering");
    pG1.setResearch("Data Mining");
    System.out.println("Postgrad Student Info");
    pG1.displayStudentInfo();
  }
}

public class Course{
  private String courseName;
  private int crhour;

  public Course(String n, int c){
    courseName = n;
    crhour = c;
  }

  public void setCourseName(String course){
    courseName = course;
  }

  public String getCourseName(){
    return courseName;
  }

  public void …