Java Random nextDouble() Method

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

Parameters

Return Value

The nextDouble() method returns the next pseudorandom double number between 0.0 and 1.0.

Example 1

import java.util.Random;

public class JavaRandomNextDoubleExample1 {
public static void main(String[] args) {
        Random random = new Random();
//return the next pseudorandom double value
Double val = random.nextDouble();
System.out.println("Random Double value : "+val);
        Double val1 = random.nextDouble();
System.out.println("Random Double value : "+val1);
    }
}

Test it Now

Output:

Random Double value : 0.9331473599874305
Random Double value : 0.3410043816871041

Example 2

import java.util.Random;

public class JavaRandomNextDoubleExample2 {
public static void main(String[] args) {
        Random random = new Random();
for (double i=0;i<5;i++) {
//return the next pseudorandom double value
Double val =random.nextDouble();
System.out.println(val+" ");
        }
    }
}

Test it Now

Output:

0.7826712054759732 
0.9263394699584369 
0.4685457032740772 
0.40580525304253123 
0.9551940609374556

Example 3

import java.util.Random;
import java.util.Scanner;
import java.util.concurrent.ArrayBlockingQueue;

public class JavaRandomNextDoubleExample3 {
static  int j=1;
public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
System.out.print("Enter number of students.");
int capacity = scanner.nextInt();
ArrayBlockingQueue<String> queue = new ArrayBlockingQueue<String>(capacity);
System.out.println("Enter name of "+capacity+" students.");
for (int i=0;i<capacity;i++){
System.out.print(j++ +" ");String str = scanner.next();
queue.add(str);
        }
j=1;
        Random random = new Random();
for (String xyz :queue) {
            Double val = random.nextDouble();
System.out.println(j+++". " +xyz+"'s id  : "+val);
        }
    }
}

Test it Now

Output:

Enter number of students.2
Enter name of 2 students.
1 Reema
2 Saloni
1. Reema'sid  : 0.1132984792177768
2. Saloni'sid  : 0.8604571338175745

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Java Random Class

Java Random nextDouble() Method

Syntax

Parameters

Return Value

Example 1

Example 2

Example 3

Help Others, Please Share

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Training For College Campus