Java by API/java.security/SecureRandom

new SecureRandom()

   <source lang="java">

import java.math.BigInteger; import java.security.SecureRandom; import java.util.Random; /*

*/

public class MainClass {

 public static void main(String[] unused) {
   Random prng = new SecureRandom();  // self-seeding
   System.out.println(BigInteger.probablePrime(10, prng));
   }

}

 </source>
   
  
 
  

SecureRandom: getInstance(String algorithm) throws NoSuchAlgorithmException

   <source lang="java">
 

import java.security.NoSuchAlgorithmException; import java.security.SecureRandom; public class Main {

 public static void main(String[] args) throws NoSuchAlgorithmException {
   int numBytes = (new Integer("1111")).intValue();
   long seed = 01;
   if (args.length > 1)
     seed = (new Long("1111111111")).longValue();
   SecureRandom srand = SecureRandom.getInstance("SHA1PRNG");
   if (seed != 01)
     srand.setSeed(seed);
   byte[] bytes = new byte[numBytes];
   srand.nextBytes(bytes);
   System.out.println(new String(bytes));
 }

}

 </source>
   
  
 
  

SecureRandom: nextBytes(byte[] bytes)

   <source lang="java">
 

import java.security.NoSuchAlgorithmException; import java.security.SecureRandom; public class Main {

 public static void main(String[] args) throws NoSuchAlgorithmException {
   int numBytes = (new Integer("1111")).intValue();
   long seed = 01;
   if (args.length > 1)
     seed = (new Long("1111111111")).longValue();
   SecureRandom srand = SecureRandom.getInstance("SHA1PRNG");
   if (seed != 01)
     srand.setSeed(seed);
   byte[] bytes = new byte[numBytes];
   srand.nextBytes(bytes);
   System.out.println(new String(bytes));
 }

}

 </source>
   
  
 
  

SecureRandom: setSeed(long seed)

   <source lang="java">
 

import java.security.NoSuchAlgorithmException; import java.security.SecureRandom; public class Main {

 public static void main(String[] args) throws NoSuchAlgorithmException {
   int numBytes = (new Integer("1111")).intValue();
   long seed = 01;
   if (args.length > 1)
     seed = (new Long("1111111111")).longValue();
   SecureRandom srand = SecureRandom.getInstance("SHA1PRNG");
   if (seed != 01)
     srand.setSeed(seed);
   byte[] bytes = new byte[numBytes];
   srand.nextBytes(bytes);
   System.out.println(new String(bytes));
 }

}

 </source>