dcsimg
LinkedIn
Twitter
RSS Feed
Download our iPhone app
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX


advertisement
 

Tip: How to Check Whether a Number Is Prime

Learn how to check if a number is prime using the isProbablePrime method in Java.


advertisement

Java has an API called BigInteger and it is easily able to identify if the number under consideration is a prime number or not.

Code snippet:

import java.math.BigInteger;

public class ProbablePrime
{
    public static void main(String[] args) 
   {
      ProbablePrime probablePrime = new ProbablePrime();
      int numberArg = Integer.parseInt(args[0]);
      probablePrime.proceed(numberArg);
   }
   
   private void proceed(int numberArg)
   {
      //numberArg is the number under consideration. The argument 1 for isProbablePrime method is the certainty
      System.out.println(BigInteger.valueOf(numberArg).isProbablePrime(1));
      
   }
}

/*

Expected output:

[root@mypc]# java ProbablePrime 79
true

[root@mypc]# java ProbablePrime 80
false

*/

 

Visit the DevX Tip Bank

 



   
Sridhar M S. is a Java developer from Bangalore, India. He holds a master's degree in Computer Science.
Email AuthorEmail Author
Close Icon
Thanks for your registration, follow us on our social networks to keep up-to-date