//Undergraduate.java

public class Undergraduate
    extends Student
{
    private int level;
    //1 for freshman, 2 for sophomore, 3 for junior, or 4 for senior.

    public Undergraduate()
    {
        super();
        level = 1;
    }

    public Undergraduate
    (
        String initialName,
        int initialStudentNumber,
        int initialLevel
    )
    {
        super(initialName, initialStudentNumber);
        setLevel(initialLevel); //Checks 1 <= initialLevel <= 4
    }

    public void reset
    (
        String newName,
        int newStudentNumber,
        int newLevel
    )
    {
        reset(newName, newStudentNumber); //StudentŐs reset
        setLevel(newLevel); //Checks 1 <= newLevel <= 4
    }

    public int getLevel()
    {
        return level;
    }

    public void setLevel
    (
        int newLevel
    )
    {
        if ((1 <= newLevel) && (newLevel <= 4))
            level = newLevel;
        else
        {
            System.out.println("Illegal level!");
            System.exit(0);
        }
    }

    public void writeOutput()
    {
        super.writeOutput();
        System.out.println("Student Level: " + level);
    }

    public boolean equals
    (
        Undergraduate otherUndergraduate
    )
    {
        return equals((Student)otherUndergraduate) &&
            (this.level == otherUndergraduate.level);
    }
    /*
    //Alternate version of equals() method
    public boolean equals
    (
        Undergraduate otherUndergraduate
    )
    {
        return super.equals(otherUndergraduate) &&
            (this.level == otherUndergraduate.level);
    }
    */
}