I have an integer array with 40 integer values and need to put these randomly on into another integer array. I have a random number that chooses a random value from the first array, but if that specific integer has already been chosen, it has to pick a new random value, but that last part seems to bug for some
Tag: random
java- how to generate a 6 digit random hexadecimal value
I have a scenario in a Android app, where a random hexadecimal value has to be generated with 6 digits. (The range of values can be hexadecimal or integer values). What is the most efficient way to do this? Do I have to generate a random decimal number, and then convert it to hexadecimal? Or can a value be directly
Generating a random double in an exclusive range
I’m trying to generate a random floating point number between but not including it’s lower and upper bounds (lower, upper). I’ve seen a lot of questions about generating a number from, and including it’s lower bound up to, but not including it’s upper bound [lower, upper), but that’s not what I’m after. I’ve come up with two “solutions” to the
Getting rid of FindBugs “Random object created and used only once” when Random is created in the constructor
I want to get rid of the FindBugs warning “DMI: Random object created and used only once”. In the following example, the random number is generated only once upon the object construction. In other terms, for the lifecycle of a single instance of the class Wrap, no other instances of java.util.Random will be created. Is there a way to get
Generate a Secure Random Password in Java with Minimum Special Character Requirements
How do I create a random password that meets the system’s length and character set requirements in Java? I have to create a random password that is 10-14 characters long and has at least one uppercase, one lowercase, and one special character. Unfortunately, some special characters are too special and cannot be used, so I cannot use just printed ASCII.
How to chose a random point at a certain distance to a reference point
I have point A (pointA = (x1, y1)) and I need to choose a random point B (pointB = (x2, y2)) such that the distance between the A and B is equal to K. Answer Let’s solve in polar form. We’ll need these doubles distance, x1, and y1. First, we want the angle in radians: Then we want to get
Load random Image from a directory using javafx
How can I load a random image from a directory using javafx, (the files located in the directory have different names) Currently I am using the following to load a specific file Answer Thanks to Patrick I came up with a short version:
How can I shuffle the letters of a word?
What is the easiest way to shuffle the letters of a word which is in an array? I have some words in an array and I choose randomly a word but I also want to shuffle the letters of it. I am not supposed to use that List thing. I’ve come up with something like this but with this code
Pick a random value from an enum?
If I have an enum like this: What is the best way to pick one randomly? It doesn’t need to be production quality bulletproof, but a fairly even distribution would be nice. I could do something like this But is there a better way? I feel like this is something that’s been solved before. Answer The only thing I would
How to generate a random alpha-numeric string
I’ve been looking for a simple Java algorithm to generate a pseudo-random alpha-numeric string. In my situation it would be used as a unique session/key identifier that would “likely” be unique over 500K+ generation (my needs don’t really require anything much more sophisticated). Ideally, I would be able to specify a length depending on my uniqueness needs. For example, a