write a program to print all prime numbers from 1 to 100 in java code example

Example 1: Java program to print prime numbers from 2 to n

// Java program to print prime numbers from 2 to n
import java.util.Scanner;
public class PrimeNumberFrom2Ton
{
   public static void main(String[] args) 
   {
      int loop, max;
      System.out.print("Please enter highest (maximum) number: ");
      Scanner sc = new Scanner(System.in);
      max = sc.nextInt();
      for(loop = 2; loop < max; ++loop)
      {
         if(findPrime(loop))
         {
            System.out.println(loop);
         }
      }
      sc.close();
   }
   public static boolean findPrime(int number)
   {
      int a;
      boolean boolPrime = true;
      for(a = 2; a < number / 2; a++)
      {
         if(number%a == 0)
         {
            boolPrime = false;
            break;
         }
      }
      return boolPrime;
   }
}

Example 2: Java program to display prime numbers from 1 to 100

public class PrimeNumbersFrom1To100
{
   public static void main(String[] args)
   {
      int maxNumber = 100;
      boolean prime = true;
      String primeNumbers = "";
      for(int a = 1; a <= maxNumber; a++)
      {
         prime = checkPrime(a);
         if(prime)
         {
            primeNumbers = primeNumbers + a + " ";
         }
      }
      System.out.println("Display prime numbers from 1 to " + maxNumber + ": ");
      System.out.println(primeNumbers);
   }
   public static boolean checkPrime(int number)
   {
      int remainder;
      for(int a = 2; a <= number / 2; a++)
      {
         remainder = number % a;
         // if remainder is equal to 0 then number is not prime
         if(remainder == 0)
         {
            return false;
         }
      }
      return true;
   }
}