Membuat Barisan Bilangan Prima Antara Dua Bilangan dengan Java

BilanganPrima

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 * @Developer    : Erik Gunawan
 * @Nickname     : EXz
 * @Phone        : 0896 5332 0577
 * @EMail        : admin@erikgunawan.com
 * @Gmail        : erik.gunawan44@gmail.com
 * @Website      : www.erikgunawan.com
 * @Facebook     : facebook.com/revolutionist.exz
 * @Twitter      : twitter.com/_EXz
 */

public class BilanganPrima {
    
    private static BufferedReader br = null;
            
    public static void main(String[] args) {
        System.out.println("==============================");
        System.out.println("Membuat Barisan Bilangan Prima");
        System.out.println("==============================");
        System.out.println();
        
        br = new BufferedReader(new InputStreamReader(System.in));
        try {
            System.out.print("Masukkan batas bilangan pertama: ");
            int a = Integer.parseInt(br.readLine());
            
            System.out.print("Masukkan batas bilangan terakhir: ");
            int b = Integer.parseInt(br.readLine());
            
            System.out.println("\nBarisan Bilangan Prima antara " + a + " dan " + b + ": ");
            getPrima(a, b);
        } 
        catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }
    
    private static void getPrima(int batasAwal, int batasAkhir) {
        String prima = "";
        for (int i=batasAwal; i<=batasAkhir; i++) {
            if (checkPrima(i))
                prima += i + ", ";
        }
        System.out.println(prima.substring(0, prima.length()-2));
    }
    
    private static Boolean checkPrima(int angka) {
        int i;
        for (i=2; i<=angka-1; i++) {
            if (angka % i == 0)
                return false;
        }

        if (angka==i)
            return true;
        
        return false;
    }
}