31_ObjectPassing1.java

/*
 * Program on object passing taking input from user
 */
package javaprograms;
import java.io.*;
/**
 *
 * @author Geeky Keshav
 */
public class ObjectPassing1
{
    String name;
    int rollno;
    float perc;
    String grade;
    
    void disp()
    {
        System.out.println("***********************");
        System.out.println("Student name: "+name);
        System.out.println("Student Roll no.: "+rollno);
        System.out.println("Student's Percentage: "+perc);
        System.out.println("Student's Grade: "+grade);
        System.out.println("***********************");
    }
}
class std_marks1
{
    public static void main(String [] args)throws Exception
    {
        DataInputStream obj=new DataInputStream(System.in);
       
        System.out.print("Enter name of the Student: ");
        String n=obj.readLine();
        System.out.print("Enter Roll No.: ");
        int r=Integer.parseInt(obj.readLine());
        System.out.print("Enter Percentage of the Student: ");
        float p=Float.parseFloat(obj.readLine());
        
        ObjectPassing1 obj1=new ObjectPassing1(); 
        obj1.name=n;
        obj1.rollno=r;
        obj1.perc=p;
        
        
        System.out.println("***********************");
        System.out.print("Enter name of the Student: ");
        n=obj.readLine();
        System.out.print("Enter Roll No.: ");
        r=Integer.parseInt(obj.readLine());
        System.out.print("Enter Percentage of the Student: ");
        p=Float.parseFloat(obj.readLine());
        
        ObjectPassing1 obj2=new ObjectPassing1();
        obj2.name=n;
        obj2.rollno=r;
        obj2.perc=p;
        
        
        System.out.println("***********************");
        System.out.print("Enter name of the Student: ");
        n=obj.readLine();
        System.out.print("Enter Roll No.: ");
        r=Integer.parseInt(obj.readLine());
        System.out.print("Enter Percentage of the Student: ");
        p=Float.parseFloat(obj.readLine());
        
        ObjectPassing1 obj3=new ObjectPassing1();
        obj3.name=n;
        obj3.rollno=r;
        obj3.perc=p;
        
        
        std_grade(obj1);
        obj1.disp();
        std_grade(obj2);
        obj2.disp();
        std_grade(obj3);
        obj3.disp();         
    }
    static void std_grade(ObjectPassing1 g)
    {
        if(g.perc>=80)
        {
            g.grade="A";
        }
        else if(g.perc>60 && g.perc<75)
        {
            g.grade="B";
        }
        else if(g.perc>=60 && g.perc<50)
        {
            g.grade="C";
        }
        else 
            g.grade="F";
    }
}

/******OUTPUT****
run:
Enter name of the Student: kk
Enter Roll No.: 1
Enter Percentage of the Student: 95.5
***********************
Enter name of the Student: kkk
Enter Roll No.: 2
Enter Percentage of the Student: 95.0
***********************
Enter name of the Student: kkkk
Enter Roll No.: 3
Enter Percentage of the Student: 60
***********************
Student name: kk
Student Roll no.: 1
Student's Percentage: 95.5
Student's Grade: A
***********************
***********************
Student name: kkk
Student Roll no.: 2
Student's Percentage: 95.0
Student's Grade: A
***********************
***********************
Student name: kkkk
Student Roll no.: 3
Student's Percentage: 60.0
Student's Grade: F
*********************** 
 */