Java Program to generate custom random number -1 or 1

To generate custom random number 1 or -1, you need to use nextBoolean(). At first take a loop and create a Random object on each iteration −

for (int i = 0; i < 5; i++) {
   Random rand = new Random();
}

Now, use nextBoolean() to generate 1 on TRUE condition, ekse -1 −

for (int i = 0; i < 5; i++) {
   Random rand = new Random();
   if (rand.nextBoolean())
      System.out.println(1);
   else
      System.out.println(-1);
}

Example

 Live Demo

import java.util.Random;
public class Demo {
   public static void main(String[] args) {
      for (int i = 0; i < 5; i++) {
         Random rand = new Random();
         if (rand.nextBoolean())
            System.out.println(1);
         else
            System.out.println(-1);
      }
   }
}

Output

1
-1
-1
-1
-1

Karthikeya Boyini

Published on 23-Apr-2019 09:00:28

• Related Questions & Answers
• Java Program to generate random number with restrictions
• C++ program to generate random number
• Java program to generate random numbers
• MySQL update with random number between 1 - 3
• Java Program to generate a random number from an array
• Python Program to Generate Random Numbers from 1 to 20 and Append Them to the List
• Java Program to generate random numbers string
• Generate Random Float type number in Java
• Generate Random double type number in Java
• Program to find sum of series 1 + 1/2 + 1/3 + 1/4 + .. + 1/n in C++
• Java Program to generate n distinct random numbers
• Python Program to Compute the Value of Euler's Number e. Use the Formula: e = 1 + 1/1! + 1/2! + …… 1/n!
• How to return a random number between 1 and 200 with JavaScript?
• MySQL UPDATE the corresponding column with random number between 1-3?
• Java Program to generate random numbers with no duplicates