import random imports the random module, which contains a variety of things to do with random number generation. Among these is the random() function, which generates random numbers between 0 and 1. Doing the import this way this requires you to use the syntax random.random(). The random function can also be imported from the module … Read more
The need is the possible desire for reproducible results, which may for example come from trying to debug your program, or of course from trying to redo what it does: These two results we will “never” reproduce as I just asked for something “random”: These two, however, are identical because I set the seed: There is … Read more
The most fundamental problem of your test application is that you call srand once and then call rand one time and exit. The whole point of srand function is to initialize the sequence of pseudo-random numbers with a random seed. It means that if you pass the same value to srand in two different applications (with the same srand/rand implementation) then you will get exactly the same sequence of rand() values read after … Read more
The Random class is used to create random numbers. (Pseudo-random that is of course.). Example: If you are going to create more than one random number, you should keep the Random instance and reuse it. If you create new instances too close in time, they will produce the same series of random numbers as the random generator is seeded from … Read more
The first solution is to use the java.util.Random class: Another solution is using Math.random(): or
For example: To generate 8 unique random numbers and store them to an array, you can simply do this: