generating random numbers java code example
Example 1: java random number
import java.util.Random;
Random rand = new Random();
// Obtain a number between [0 - 49].
int n = rand.nextInt(50);
// Add 1 to the result to get a number from the required range
// (i.e., [1 - 50]).
n += 1;
Example 2: how to create a random number in java
import java.util.Random;
class scratch{
public static void main(String[] args) {
Random rand = new Random();
System.out.println( rand.nextInt(5) );
//prints a random Int between 0 - 4 (including 0 & 4);
}
}
Example 3: how to generate a random number in java
import java.util.Random;
Random rand = new Random();
int maxNumber = 10;
int randomNumber = rand.nextInt(maxNumber) + 1;
System.out.println(randomNumber);
Example 4: generate random number java
// JAVA - WITH A RANGE
(Math.random() * ((max - min) + 1)) + min
Example 5: random number generator java
import java.util.Random;
class GenerateRandom {
public static void main( String args[] ) {
Random rand = new Random(); //instance of random class
int upperbound = 25;
//generate random values from 0-24
int int_random = rand.nextInt(upperbound);
double double_random=rand.nextDouble();
float float_random=rand.nextFloat();
System.out.println("Random integer value from 0 to" + (upperbound-1) + " : "+ int_random);
System.out.println("Random float value between 0.0 and 1.0 : "+float_random);
System.out.println("Random double value between 0.0 and 1.0 : "+double_random);
}
}