code for BAEL-747 after incorporating review comments (#1560)

core-java/src/main/java/com/baeldung/primechecker/BigIntegerPrimeChecker.java

@@ -1,13 +0,0 @@
-package com.baeldung.primechecker;
-
-import java.math.BigInteger;
-
-public class BigIntegerPrimeChecker implements PrimeChecker{
-
-    @Override
-    public boolean isPrime(int number) {
-        BigInteger bigInt = BigInteger.valueOf(number);
-        return bigInt.isProbablePrime(100);
-    }
-
-}

core-java/src/main/java/com/baeldung/primechecker/BruteForcePrimeChecker.java

@@ -1,13 +0,0 @@
-package com.baeldung.primechecker;
-
-import java.util.stream.IntStream;
-
-public class BruteForcePrimeChecker implements PrimeChecker{
-
-    @Override
-    public boolean isPrime(int number) {
-        return IntStream.range(2, number).filter(n -> (number % n == 0)).count() == 0;
-    }
-
-    
-}       

core-java/src/main/java/com/baeldung/primechecker/OptimisedPrimeChecker.java

@@ -1,15 +0,0 @@
-package com.baeldung.primechecker;
-
-import java.util.stream.IntStream;
-
-public class OptimisedPrimeChecker implements PrimeChecker{
-
-    @Override
-    public boolean isPrime(int number) {
-        return IntStream.range(2, (int)Math.sqrt(number) + 1)
-            .filter(n -> (number % n == 0))
-            .count() == 0;
-    }
-
-    
-}

core-java/src/main/java/com/baeldung/primechecker/PrimeChecker.java

@@ -1,6 +0,0 @@
-package com.baeldung.primechecker;
-
-public interface PrimeChecker {
-    
-    public boolean isPrime( int number );
-}

core-java/src/main/java/com/baeldung/primechecker/PrimesPrimeChecker.java

@@ -1,12 +0,0 @@
-package com.baeldung.primechecker;
-
-import org.apache.commons.math3.primes.Primes;
-
-public class PrimesPrimeChecker implements PrimeChecker{
-
-    @Override
-    public boolean isPrime(int number) {
-        return Primes.isPrime(number);
-    }
-
-}