In this HackerRank Prime Checker problem in java programming language You are given a class Solution and its main method in the editor. Your task is to create a class Prime. The class Prime should contain a single method checkPrime.


HackerRank Prime Checker solution in java


HackerRank Prime Checker problem solution in java programming.

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
import java.lang.reflect.*;

import static java.lang.System.in;

class Prime {
    void checkPrime(int... numbers) {
        for (int num : numbers) {
            if (isPrime(num)) {
                System.out.print(num + " ");
            }
        }
        System.out.println();
    }
    
    boolean isPrime(int n) {
        if (n < 2) {
            return false;
        } else if (n == 2) {
            return true;
        } else if (n % 2 == 0) {
            return false;
        }
        int sqrt = (int) Math.sqrt(n);
        for (int i = 3; i <= sqrt; i += 2) {
            if (n % i == 0) {
                return false;
            }
        }
        return true;
    }     
}

public class Solution {

    public static void main(String[] args) {
        try{
        BufferedReader br=new BufferedReader(new InputStreamReader(in));
        int n1=Integer.parseInt(br.readLine());
        int n2=Integer.parseInt(br.readLine());
        int n3=Integer.parseInt(br.readLine());
        int n4=Integer.parseInt(br.readLine());
        int n5=Integer.parseInt(br.readLine());
        Prime ob=new Prime();
        ob.checkPrime(n1);
        ob.checkPrime(n1,n2);
        ob.checkPrime(n1,n2,n3);
        ob.checkPrime(n1,n2,n3,n4,n5);  
        Method[] methods=Prime.class.getDeclaredMethods();
        Set<String> set=new HashSet<>();
        boolean overload=false;
        for(int i=0;i<methods.length;i++)
        {
            if(set.contains(methods[i].getName()))
            {
                overload=true;
                break;
            }
            set.add(methods[i].getName());
            
        }
        if(overload)
        {
            throw new Exception("Overloading not allowed");
        }
        }
        catch(Exception e)
        {
            System.out.println(e);
        }
    }
    
}


The solution in Java 8 programming.

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
import java.lang.reflect.*;
import static java.lang.System.*;

class Prime {
 static void checkPrime(int...arr) {
  for (int i = 0; i < arr.length; i++) {
   boolean flag = false;
   for (int j = 2; j <= Math.sqrt(arr[i]); j++) {
    if (arr[i] % j == 0) {
     flag = true;
     break;
    }
   }
   if (arr[i] > 1 && (!flag || arr[i] == 2)) {
    System.out.print(arr[i] + " ");
   }
  }
  System.out.println();
 }
}

public class Solution {

  public static void main(String[] args) {
    try{
    BufferedReader br=new BufferedReader(new InputStreamReader(in));
    int n1=Integer.parseInt(br.readLine());
    int n2=Integer.parseInt(br.readLine());
    int n3=Integer.parseInt(br.readLine());
    int n4=Integer.parseInt(br.readLine());
    int n5=Integer.parseInt(br.readLine());
    Prime ob=new Prime();
    ob.checkPrime(n1);
    ob.checkPrime(n1,n2);
    ob.checkPrime(n1,n2,n3);
    ob.checkPrime(n1,n2,n3,n4,n5);  
    Method[] methods=Prime.class.getDeclaredMethods();
    Set<String> set=new HashSet<>();
    boolean overload=false;
    for(int i=0;i<methods.length;i++)
    {
      if(set.contains(methods[i].getName()))
      {
        overload=true;
        break;
      }
      set.add(methods[i].getName());
      
    }
    if(overload)
    {
      throw new Exception("Overloading not allowed");
    }
    }
    catch(Exception e)
    {
      System.out.println(e);
    }
  }
  
}