![]() Run this code on your computer and you will see that the console displays real numbers from 0 to any number less than 1. “Up to 1 exclusive” means that Math.random cannot generate the number 1. ![]() By default, Math.random() generates real numbers from the interval [0 1), i.e. And since there is a small chance to predict which number will be generated, such numbers are called pseudorandom, instead of just random. Is it possible to predict which number will be generated? In theory, it is possible, but it’s really hard to do. So, a random number is generated every time you summon Math.random() by means of the special algorithm (on the particular instruction). And inside the Math class is the random() method. In the Java class library, there is a package called "java.lang" and inside of it is the Math class. In this article, we will cover generation by means of Math.random(). Here is a basic code snippet which will take a class, instantiate it and fills its fields with random data. There are several waysto generate a random number. Java’s reflection mechanism offers an easy method to create POJOs filled with random data.
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