uk14

import java.util.Scanner;
public class Main {
static class NumberIsZeroException extends Exception {
public NumberIsZeroException(String message) {
super(message);
}
}
public static boolean isPrime(int number) {
if (number < 2) {
return false;
}
for (int i = 2; i <= Math.sqrt(number); i++) {
if (number % i == 0) {
return false;
}
}
return true;
}
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter a number: ");
int number = scanner.nextInt();
try {
if (number == 0) {
throw new NumberIsZeroException("Number is 0");
}
if (isPrime(number)) {
System.out.println(number + " is a prime number.");
} else {
System.out.println(number + " is not a prime number.");
}
} catch (NumberIsZeroException e) {
System.out.println(e.getMessage());
}
}
}
Q2) Write a Java program to create a Package “SY” which has a class SYMarks
(members – ComputerTotal, MathsTotal, and ElectronicsTotal). Create another
package TY which has a class TYMarks (members – Theory, Practicals). Create ‘n’
objects of Student class (having rollNumber, name, SYMarks and TYMarks). Add
the marks of SY and TY computer subjects and calculate the Grade (‘A’ for >= 70,
‘B’ for >= 60 ‘C’ for >= 50, Pass Class for > =40 else‘FAIL’) and display the result
of the student in proper format.
SOLUTION:
Program 1:
package Assignment2.SY;
import java.io.BufferedReader;
import java.io.;
public class SYClass {
public int ct,mt,et;
public void get() throws IOException{
System.out.println("Enter marks of students for computer, maths and
electronics subject out of 200 ");
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
ct=Integer.parseInt(br.readLine());
mt=Integer.parseInt(br.readLine());
et=Integer.parseInt(br.readLine());
}
}
Program 2:
package Assignment2.TY;
import java.io.;
public class TYClass {
public int tm,pm;
public void get() throws IOException{
System.out.println("Enter the marks of the theory out of 400 and practicals out
of 200: ");
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
tm=Integer.parseInt(br.readLine());
pm=Integer.parseInt(br.readLine());
}
}
Program 3:
package Assignment2;
import Assignment2.SY.;
import Assignment2.TY.;
import java.io.*;
class StudentInfo{
int rollno;
String name,grade;
public float gt,tyt,syt;
public float per;
public void get() throws IOException{
System.out.println("Enter roll number and name of the student: ");
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
rollno=Integer.parseInt(br.readLine());
name=br.readLine();
}
}
public class StudentMarks {
public static void main(String[] args) throws IOException{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter the number of students:");
int n=Integer.parseInt(br.readLine());
SYClass sy[]=new SYClass[n];
TYClass ty[]=new TYClass[n];
StudentInfo si[]=new StudentInfo[n];
for(int i=0;i<n;i++)
{
si[i]=new StudentInfo();
sy[i]=new SYClass();
ty[i]=new TYClass();
si[i].get();
sy[i].get();
ty[i].get();
si[i].syt=sy[i].ct+sy[i].et+sy[i].mt;
si[i].tyt=ty[i].pm+ty[i].tm;
si[i].gt=si[i].syt+si[i].tyt;
si[i].per=(si[i].gt/1200)*100;
if(si[i].per>=70) si[i].grade="A";
else if(si[i].per>=60) si[i].grade="B";
else if(si[i].per>=50) si[i].grade="C";
else if(si[i].per>=40) si[i].grade="Pass";
else si[i].grade="Fail";
}
System.out.println("Roll
No\tName\tSyTotal\tTyTotal\tGrandTotal\tPercentage\tGrade");
for(int i=0;i<n;i++)
{
System.out.println(si[i].rollno+"\t"+si[i].name+"\t"+si[i].syt+"\t"+si[i].tyt+"\t"+si[
i].gt+"\t\t"+si[i].per+"\t\t"+si[i].grade);
}
}
}