How to Generate Random Numbers in Java?

Working with Random Numbers in Java

Generating random numbers plays a vital role in various applications. Java provides the Random class and Math.random() method for this purpose. Let's dive into how these approaches work.

Using java.util.Random:

The Random class is a more versatile option for generating random numbers. To use it, you can create an instance and call the nextInt() method with the desired range as an argument. For example, if you want a number between 1 and 50, you would do:

<code class="java">Random rand = new Random();
int n = rand.nextInt(50);
n += 1; // Add 1 to get the required range</code>

Using Math.random():

Math.random() generates a double value between 0 (inclusive) and 1 (exclusive). To bound this value, you can multiply it by the desired range and add the minimum value. For the same example, you could use:

<code class="java">double random = Math.random() * 49 + 1;</code>

or

<code class="java">int random = (int)(Math.random() * 50 + 1);</code>

By utilizing these techniques, you can efficiently generate random numbers within a specified range in Java.

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