Javaslip1

question 1Write a Program to print all Prime numbers in an array of ‘n’elements. (use command line arguments)

class PrNo

{

public static void main (String[] args)
{
int size = args.length;
int[] array = new int [size];
for(int i=0; i<size; i++)
{
array[i] = Integer.parseInt(args[i]);
}
for(int i=0; i<array.length; i++)
{
boolean isPrime = true;
for (int j=2; j<array[i]; j++)
{
if(array[i]%j==0)
{
isPrime = false;
break;
}
}
if(isPrime)
System.out.println(array[i] + " are the prime numbers in the array ");
}
}
}

question 2 Define an abstract class Staff with protected members id and name. Define a parameterized constructor. Define one subclass OfficeStaff with member department. Create n objects of OfficeStaff and display all details.

import java.util.*;

abstract class Staff

{
protected int id;
protected String name;
public Staff(int id,String name)

{

this.id=id;
this.name=name;
}
}
class OfficeStaff extends Staff
{
String dept;
OfficeStaff(int id,String name,String dept)
{
super(id,name);
this.dept=dept;
}
public void display()
{
System.out.println("ID :"+id+" Name :"+name+" Department :"+dept);
}
public static void main(String args[])
{
int n,id;
String name,dept;
Scanner sc=new Scanner(System.in);
System.out.println("How many staff members?");
n=sc.nextInt();
OfficeStaff ob[]=new OfficeStaff[n];
System.out.println("Enter details of "+n+" staff");
for(int i=0;i<n;i++)
{

System.out.println("Enter id,name, department");
id=sc.nextInt();
name=sc.next();
dept=sc.next();
ob[i]=new OfficeStaff(id,name,dept);
}
System.out.println("Entered Details are\n");
for(int i=0;i<n;i++)
{
ob[i].display();
}
}
}