Random Number Guess Program in Java

import java.util.Random;
import java.util.Scanner;

public class GuessNum {

public GuessNum() {        

        int numRandom = 0;  
        int numGuess;  
        int life = 5;  
        String want = "";  
        Random rand = new Random();  
        Scanner scan = new Scanner(System.in);

        do {
            int lifeLeft = 5;
            numRandom = rand.nextInt(9)+1;
           // System.out.print("the number:"+numRandom);
            System.out.print("\nGuess the Number [1..10]\n");
            System.out.print("===================\n");
            System.out.print("You have " + lifeLeft + " chances.\n");

            do {
                do {
                    System.out.print("What number do I have in mind: ");
                    numGuess = scan.nextInt();

                    if (numGuess < 1 || numGuess > 10)  
                        System.out.println("Invalid input. Range is 1-10.");  
                } while (numGuess < 1 || numGuess > 10);

                if (numGuess != numRandom && lifeLeft != 0)
                    System.out.println("Wrong! You only have " + --lifeLeft + " chances left.");

            } while (numGuess!=numRandom && lifeLeft > 0);

            if (numGuess == numRandom)
                System.out.println("Correct! -- in " + (life - lifeLeft) + " guess(es).");

            if (lifeLeft == 0) {
                System.out.println("You have no more lives..");
                System.out.println("This is the number: " + numRandom);
            }

            System.out.print("\nEnter 'y' if you want to play again or any other character to exit: ");
                want = scan.nextLine();
        } while (want.equals("y") || want.equals("Y"));
    }

    public static void main(String[] args) {          
        new GuessNum();
    }
}

Prime number program in Java

Prime number function using Static function


import java.io.*;

public class Prime
{
  public static void main (String[] arqs)
  {
Console console = System.console();

String sPrimenumber=console.readLine();

    int iPrimenumber=Integer.parseInt(sPrimenumber);

    if(primeNumber(iPrimenumber))
    {
     System.out.println("prime");
    }
    else
    System.out.println("not prime");
  }
 static boolean primeNumber(int number)
  {
     for(int i=2;i     {
       if(number%i==0)
       {

       return false;

       }
     }
     return true;

  }


}

====================================================
Prime number using class's function



import java.io.*;

public class Prime
{
  public static void main (String[] arqs)
  {
Console console = System.console();

String sPrimenumber=console.readLine();

    int iPrimenumber=Integer.parseInt(sPrimenumber);

    Number objNumber=new Number();

    if(objNumber.testNumber(iPrimenumber))
    {
     System.out.println("prime");
    }
    else
    System.out.println("not prime");
  }



}

class Number
{
public boolean testNumber(int number)
{
for(int i=2;i     {
      if(number%i==0)
      {

      return false;

      }
    }
         return true;
}

}

============================================