java 404AB Lab

package gpa;
public class Main {
      public static void main(String[] args) {
    Gpa obj= new Gpa();
    int JAVA= 0;
    int DE= 60;
    int MATH = 40;
    int TESTING = 30;

    double cgpa=obj.cgpa(JAVA,DE,MATH,TESTING);

    System.out.println("CGPA: "+obj.gpa(60));

}
}

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package gpa;

public class Gpa {
        private double gpa=0.0;
        public double gpa(int a){

            if (40>a)
                gpa =0.0;
            else if (50<=a && 60>a)
                gpa =2.0;
            else if (60<=a && 70>a)
                gpa =3.0;
            else if (70<=a && 80>a)
                gpa=3.5;
            else if (80<=a)
                gpa = 4.0;
            return gpa;
        }

    public double cgpa (int a,int b,int c,int d) {
        return (this.gpa(a)*4+this.gpa(b)*4+this.gpa(c)*3+this.gpa(d)*3)/14;

    }
}