This is a pretty simple Java (though probably applicable to all programming) question: Math.random() returns a number between zero and one. If I want to return an integer between zero and hundred...
I would like to get a random value between 1 to 50 in Java. How may I do that with the help of Math.random();? How do I bound the values that Math.random() returns?
Min + (int)(Math.random() * ((Max - Min) + 1)) The Java Math library function Math.random () generates a double value in the range [0,1). Notice this range does not include the 1. In order to get a specific range of values first, you need to multiply by the magnitude of the range of values you want covered.
What method returns a random int between a min and max? Or does no such method exist? What I'm looking for is something like this: NAMEOFMETHOD (min, max) (where min and max are ints), that ret...
In my code I use random numbers in different classes. How to define random seed? Can I define this seed for all the classes in the main code? double rnd = Math.random();
You cannot use Math.random () to generate a random integer within a range of numbers, as seen in the docs. But you may use the Random class comming in the java.util package, and use the method .nextInt() or more specifically .nextInt(int maximum) where maximum will be 53, not 52 because as docs state, the method is exclusive.
Math.random () is basically a convenience method that uses a single instance of Random. If you want more flexibility, you should use a Random instance instead. But as James_D mentioned, setting a minimum range is usually done by adding the minimum to the random number.
Does Java have any functionality to generate random characters or strings? Or must one simply pick a random integer and convert that integer's ASCII code to a character?
The best way to generate a random floating-point value in Java (assuming you don't need a specific seed and you don't need to be cryptographically secure) is the ThreadLocalRandom class. For example, if you want a method that generates random numbers between two other numbers, you could write it like this:
