The Prime Directive

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Sat Nov 05 2022 05:28:45 GMT+0000 (Coordinated Universal Time)

// Import statement:
import java.util.ArrayList;
class PrimeDirective {
  
  // Add your methods here:
  public static boolean isPrime(int number){
    if(number>1){
      for(int i=2; i < number; i++){
        if (number % i == 0){
          return false;
        }
      }return true;
    }else{
      return false;
    }
  }

  public ArrayList<Integer> onlyPrimes(int[] numbers){
    ArrayList<Integer> primes = new ArrayList<Integer>();
    for(int i : numbers){
      if(isPrime(i) == true){
        primes.add(i);
      }
    }
    return primes;
  }
  
  public static void main(String[] args) {

    PrimeDirective pd = new PrimeDirective();
    int[] numbers = {2,3,47,6, 29, 28, 33, 11, 100, 101, 43, 89};

    System.out.println(isPrime(7));
    System.out.println(isPrime(28));
    System.out.println(isPrime(2));
    System.out.println(isPrime(0));

System.out.println(pd.onlyPrimes(numbers));


  }  

}

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The Prime Directive

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