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What is the SecureRandom.generateSeed() method in Java?

Gutha Vamsi Krishna

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

Overview

The generateSeed() method is used to generate a given number of seed bytes. These seed bytes are computed using the seed generation algorithm. This method is from the SecureRandom class, which consists of methods to generate strong random numbers.

Syntax

secureRandomInstnace.generateSeed(number_of_bytes)

Parameters

This method takes the number_of_bytes as a parameter.

Return value

It returns an array of seed bytes.

Example

import java.security.*;
import java.util.*;

public class main {
	public static void main(String[] argv)
	{
		//create instance of securerandom
		SecureRandom rndm = new SecureRandom();

		//get seed bytes
		byte bytes[] = rndm.generateSeed(15);

		//display the seed bytes array
		System.out.println(Arrays.toString(bytes));
	}
}

Explanation

  • Line 8: We create an instance of the SecureRandom class and assign it to variable, rndm.
  • Line 11: We get the seed bytes for a given number of bytes using the generateSeed() method, which we call on the rndm instance.
  • Line 14: We display the seed bytes array, bytes.

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Gutha Vamsi Krishna
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Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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