Write a program to accept a number, check whether the numbers is prime number or not. If number is prime, then display “PRIME NUMBER” or display “NOT A PRIME NUMBER”.

class PrimeNum
{
  public static void main(String args[])
  {
    int i,f = 0;
    int n  =  Integer.parseInt(args[0]);
    for(i = 2;i<n;i++)
    {
      if(n%i =  = 0)
      {
        f = 1;
        break;
      }
    }
    if(f =  = 0)
      System.out.print ("The given no. "+n+" is a prime number");
    else
      System.out.print ("The given no. "+n+" is not a prime number");
  }
}

Create a list of names of 5 Country’s and then display name alphabetically.

public class CountrySort
{
  public static void main()
  {
    String a[] = {"Germany", "Nepal", "India", "Pakistan", "Iraq"};
    String k;
    int i,j;
    for(i = 0;i<4;i++)
    {
      for(j = 0;j<4-i;j++)
      {
        if(a[j].compareTo(a[j+1])>0)
        {
          k = a[j];
          a[j] = a[j+1];
          a[j+1] = k;
        }
      }
    }
    for(j = 0;j<5;j++)
      System.out.println (a[j]);
  }
}

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