Interactive program

Hi Friend,

Try the following code:

import java.util.*;

public class StudentResult{
    String studentID;
    String name;
    double hindi;
    double maths;
    double science;
    double total;
    String grade;
public void setStudentID(String studentID){
    this.studentID=studentID;
}
public String getStudentID(){
    return studentID;
}
public void setName(String name){
this.name=name;
}
public String getName(){
    return name;
}
public void setHindi(double hindi){
this.hindi=hindi;
}
public double getHindi(){
    return hindi;
}
public void setMaths(double maths){
this.maths=maths;
}
public double getMaths(){
    return maths;
}
public void setScience(double science){
this.science=science;
}
public double getScience(){
    return science;
}
public void setTotal(double total){
this.total=total;
}
public double getTotal(){
    return total;
}
public void setGrade(String grade){
this.grade=grade;
}
public String getGrade(){
    return grade;
}
public static void main(String[]args){
    Scanner input=new Scanner(System.in);
    System.out.print("No of students in a class: ");
    int menu = input.nextInt();
    System.out.println();

StudentResult data[]=new StudentResult[menu];
for (int i=0; i<data.length; i++) {
    int j=i+1;
 System.out.println();
System.out.println("********Student "+j+"*********");
System.out.println("Enter Registration No:");
            String no=input.next();
            System.out.println("Enter Name: ");
            String n=input.next();
            System.out.println("Marks in Hindi:");
            double m1=input.nextDouble();
            System.out.println("Marks in Maths:");
            double m2=input.nextDouble();
            System.out.println("Marks in Science");
            double m3=input.nextDouble();
            double tmarks=m1+m2+m3;
            double tm=tmarks/3;
            data[i] = new StudentResult();
data[i].setStudentID(no);
data[i].setName(n);
data[i].setHindi(m1);
data[i].setMaths(m2);
data[i].setScience(m3);
data[i].setTotal(tmarks);

continue.........

if(tm<40){
data[i].setGrade("Fail");
}
if(tm>40&&tm<60){
    data[i].setGrade("D");
}
if(tm>60&&tm<70){
    data[i].setGrade("C");
}
if(tm>70&&tm<90){
    data[i].setGrade("B");
}
if(tm>90){
    data[i].setGrade("A");
}
}
 System.out.println();
String g1="",g2="",g3="";
for(int i=0;i<menu;i++){
      StudentResult show = data[i];
      String ide=show.getStudentID();
      String nn=show.getName();
        double mar1=show.getHindi();
          double mar2=show.getMaths();
            double mar3=show.getScience();
                 double tot=show.getTotal();
                 String g = show.getGrade();
      System.out.println("Result of Student "+(i+1));
      System.out.print("Registration Number: "+ide+"\n");
      System.out.print("Student Name: "+nn+"\n");
      if(mar1<40){
    g1="Fail";
}
if(mar1>=40&&mar1<=60){
    g1="D";
}
if(mar1>60&&mar1<=70){
    g1="C";
}
if(mar1>70&&mar1<=90){
    g1="B";
}
if(mar1>90){
    g1="A";
}

 if(mar2<40){
    g2="Fail";
}
if(mar2>40&&mar2<60){
    g2="D";
}
if(mar2>60&&mar2<70){
    g2="C";
}
if(mar2>70&&mar2<90){
    g2="B";
}
if(mar2>90){
    g2="A";
}

 if(mar3<40){
    g3="Fail";
}
if(mar3>40&&mar3<60){
    g3="D";
}
if(mar3>60&&mar3<70){
    g3="C";
}
if(mar3>70&&mar3<90){
    g3="B";
}
if(mar3>90){
    g3="A";
}
      System.out.print("Marks in Hindi: "+mar1+"\n");
      System.out.print("Grade in Hindi: "+g1+"\n");
      System.out.print("Marks in Maths: "+mar2+"\n");
      System.out.print("Grade in Maths: "+g2+"\n");
      System.out.print("Marks in Science: "+mar3+"\n");
      System.out.print("Grade in Science: "+g3+"\n");
      System.out.print("Total Marks: "+tot+"/300\n");
      System.out.print("Final Grade: "+g+"\n");
      System.out.println();
      }
    }
}

Thanks