Random next() method in Java with Examples

Random nextBytes() method in Java with Examples

Last Updated : 07 Jan, 2019

The nextBytes() method of Random class places the generated random bytes into an user-supplied byte array.

Syntax:

public void nextBytes(byte[] bytes)

Parameters: The function accepts a single parameter bytes which is the non-null byte array in which to put the random bytes.

Return Value: This method has no return value.

Exception: The function does not throws any exception.

Program below demonstrates the above mentioned function:

Program 1:

// program to demonstrate the 
// function java.util.Random.nextBytes() 
  
import java.util.*; 
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create random object 
        Random r = new Random(); 
  
        // create byte array 
        byte[] bytes = new byte[10]; 
  
        // put the next byte in the array 
        r.nextBytes(bytes); 
  
        // print random value of array 
        System.out.print("Random bytes = [ "); 
        for (int i = 0; i < bytes.length; i++) { 
            System.out.printf("%d ", bytes[i]); 
        } 
        System.out.print("]"); 
    } 
} 

Output:

Random bytes = [ -90 -126 -75 50 -117 -13 -55 -63 -117 47 ]

Program 2:

// program to demonstrate the 
// function java.util.Random.nextBytes() 
  
import java.util.*; 
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create random object 
        Random r = new Random(); 
  
        // create byte array 
        byte[] bytes = new byte[15]; 
  
        // put the next byte in the array 
        r.nextBytes(bytes); 
  
        // print random value of array 
        System.out.print("Random bytes = [ "); 
        for (int i = 0; i < bytes.length; i++) { 
            System.out.printf("%d ", bytes[i]); 
        } 
        System.out.print("]"); 
    } 
} 

Output:

Random bytes = [ -82 75 -105 41 -34 94 81 10 -107 -46 37 4 -1 100 -119 ]

Random next() method in Java with Examples

T

Twinkl Bajaj

Improve

Article Tags :

Practice Tags :

Java

Similar Reads

SecureRandom nextBytes() method in Java with Examples

The nextBytes() method of java.security.SecureRandom class is used to generate a user-specified number of random bytes. If a call to setSeed had not occurred previously, the first call to this method forces this SecureRandom object to seed itself. This self-seeding will not occur if setSeed was prev

Random next() method in Java with Examples

The next() method of Random class returns the next pseudorandom value from the random number generator's sequence. Syntax: protected int next(int bits) Parameters: The function accepts a single parameter bits which are the random bits. Return Value: This method returns the next pseudorandom number.

Random nextDouble() method in Java with Examples

The nextDouble() method of Random class returns the next pseudorandom, uniformly distributed double value between 0.0 and 1.0 from this random number generator's sequence. Syntax: public double nextDouble() Parameters: The function does not accepts any parameter. Return Value: This method returns th

Random nextFloat() method in Java with Examples

The nextFloat() method of Random class returns the next pseudorandom, uniformly distributed float value between 0.0 and 1.0 from the random number generator's sequence. Syntax: public float nextFloat() Parameters: The function does not accepts any parameter. Return Value: This method returns the nex

Random nextBoolean() method in Java with Examples

The nextBoolean() method of Random class returns the next pseudorandom, uniformly distributed boolean value from the random number generator's sequence. Syntax: public boolean nextBoolean() Parameters: The function does not accepts any parameter. Return Value: This method returns the next pseudorand

Random nextLong() method in Java with Examples

The nextGaussian() method of Random class returns the next pseudorandom, uniformly distributed long value from this random number generator's sequence. Syntax: public long nextLong() Parameters: The function does not accepts any parameter. Return Value: This method returns the next pseudorandom, uni

Scanner nextByte() method in Java with Examples

The nextByte(radix) method of java.util.Scanner class scans the next token of the input as a Byte. If the translation is successful, the scanner advances past the input that matched. If the parameter radix is not passed, then it behaves similarly as nextByte(radix) where the radix is assumed to be t

Random nextGaussian() method in Java with Examples

The nextGaussian() method of Random class returns the next pseudorandom, Gaussian(normally) distributed double value with mean 0.0 and standard deviation 1.0 from the random number generator's sequence. Syntax: public double nextGaussian() Parameters: The function does not accepts any parameter. Ret

Random setSeed() method in Java with Examples

The setSeed() method of Random class sets the seed of the random number generator using a single long seed. Syntax: public void setSeed() Parameters: The function accepts a single parameter seed which is the initial seed. Return Value: This method has no return value. Exception: The function does no

Field setByte() method in Java with Examples

setByte() method of java.lang.reflect.Field used to set the value of a field as a byte on the specified object. When you need to set the value of a field of an object as byte then you can use this method to set value over an Object. Syntax: public void setByte(Object obj, byte b) throws IllegalArgum