StudentRecord.java

public class StudentRecord {
    
    // Declare instance variables.
    private String name;
    private double mathGrade;
    private double englishGrade;
    private double scienceGrade;
    private double average;
    
    // Declare static variables.
    private static int studentCount = 0;
    
    // Default constructor
    public StudentRecord() {
    }
    
    // Constructor that gets single parameter
    public StudentRecord(String name){
        this.name = name;
    }
    
    // Constructor that gets two parameters
    public StudentRecord(String name, double mGrade){
        this(name);
        mathGrade = mGrade;
    }
    
    // Constructor that gets three parameters
    public StudentRecord(String name, double mGrade, double eGrade){
        this(name, mGrade);
        englishGrade = eGrade;
    }
    
    // Constructor that gets four parameters
    public StudentRecord(String name, double mGrade, double eGrade,
            double sGrade){
        this(name, mGrade, eGrade);
        scienceGrade = sGrade;
    }
    
    /**
     * Returns the name of the student
     */
    public String getName(){
        return name;
    }
    
    /**
     * Changes the name of the student
     */
    public void setName(String temp ){
        name =temp;
    }
    
    /**
     * Computes the average of the english,math and science
     * grades
     */
    public double getAverage(){
        double result =0;
        result =(getMathGrade()+getEnglishGrade()+getScienceGrade() )/3;
        return result;
    }
    
    /**
     * Returns the number of instances of StudentRecords
     */
    public static int getStudentCount(){
        return studentCount;
    }
    
    /**
     * Returns the number of instances of StudentRecords.
     * This is a static method.
     */
    public static void increaseStudentCount(){
        studentCount++;
    }
    
    // Instance methods
    public double getMathGrade() {
        return mathGrade;
    }
    
    public void setMathGrade(double mathGrade) {
        this.mathGrade = mathGrade;
    }
    
    public double getEnglishGrade() {
        return englishGrade;
    }
    
    public void setEnglishGrade(double englishGrade) {
        this.englishGrade = englishGrade;
    }
    
    public double getScienceGrade() {
        return scienceGrade;
    }
    
    public void setScienceGrade(double scienceGrade) {
        this.scienceGrade = scienceGrade;
    }
}