## Printing random even value between two values using inheritance

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I am trying to print a list of random even numbers (5 times) using a bounds. Example being from 0 to 30 (including both those numbers). This is what I have so far (this is in its own class):

public int nextEven(int h){ int n = rand.nextEven(h) % 2; return n; }

This is where it would print from my main method:

System.out.println("Random Even:"); for (int i = 0; i < 5; i++){ System.out.println(rand.nextEven(30)); }

When I run the program it gives me an error and I am not quite sure how to solve this. This is an example of the desired output of even numbers from 0 to 30:

4 26 12 10 20

It isn't clear why taking the remainder of `2`

would yield an even number. Instead, generate a number in the range `0`

to `h / 2`

and then multiply the result of that by `2`

. Like,

public int nextEven(int h){ int n = ThreadLocalRandom.current().nextInt(1 + (h / 2)); // 0 to (h / 2) inclusive return n * 2; // n * 2 is even (or zero). }

**Random Class (System),** Instantiate random number generator using system-supplied value as seed. var rand of random numbers even if they're instantiated with identical seed values. NET Framework, initializing two random number generators in a tight loop or in You can implement your own random number generator by inheriting from the Java Program to print Odd and Even Numbers from an Array We can print odd and even numbers from an array in java by getting remainder of each element and checking if it is divided by 2 or not. If it is divided by 2, it is even number otherwise it is odd number.

What exactly is rand? Is it the Random class or an instance of your own class? Since you want to do something with inheritance I guess you want to overwrite a method, but if rand is an instance of the java Random class this won't work.

The error probably comes from recursively calling nextEven method forever.

If you could clarify what exactly you want to do?

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I see at least two solutions.

The first one supposes that `random + 1 = random`

. I mean, that if you add or subtract a random number you still get a valid random number. That's why you can use `Random`

class to generate a value in the desired period and then add or subtract one it the number is odd.

The second approach is just to generate an array of even values for the desired period. Then take a random value from this array.

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The mod operator `%`

will give you the remainder of the first value divided by the second.

value % 2

... will return 0 if `value`

is even, or 1 if `value`

is odd.

Since `rand`

is a reference to an instance of the class containing your code, you have an infinite recursion. What you really need is something like:

public int nextEven(int h){ int evenRandomValue; do { evenRandomValue = (int)(Math.random() * (h + 1)); } while(evenRandomValue % 2 == 1); return evenRandomValue; }

**Python Tutorial: Inheritance,** The methods or generally speaking the software inherited by a subclass is This is even true for arbitrary ancestors of the class in the inheritance line: class A: pass class B(A): pass class C(B): pass x = C() print(isinstance(x, A)) in the heal method is done by setting the health_level to a random value between the old Random.Range(0, 10) can return a value between 0 and 9. Return min if max equals min. The Random.Range distribution is uniform. Range is a Random Number Generator.

Here is a quite explicit way to achieve this using streams:

List<Integer> myRandomInts = Random.ints(lower, upper + 1) .filter(i -> i % 2 == 0) .limit(5).boxed() .collect(Collectors.toList());

This can be read as 'generate an infinite stream of random numbers between given bounds, filter out odds, take the first 5, turn into `Integer`

objects and then collect into a list.

**Random Numbers in Python,** 1. choice() :- This function is used to generate 1 random number from a container. last number (excluded in generation) and step ( to skip numbers in range while selecting). print ( "A random number between 0 and 1 is : " , end = "") It takes two arguments, lower limit(included in generation) and upper limit(not included Here you will learn to generate random number in java between two given number by different means. I will try to provide cons for different mechanism so that you can choose what is best for you. 1- Math.random() This method will always return number between 0(inclusive) and 1(exclusive).

**Java Program to print Odd and Even numbers from an Array ,** If it is divided by 2, it is even number otherwise it is odd number. public class OddEvenInArrayExample{; public Java program to print or calculate addition of two numbers with sample outputs and example programs. Addition of two numbers program is quite a simple one, we do also write the program in five different ways using standard values, command line arguments, classes and objects, without using addition+ operator, method, BufferedReader with sample outputs and code. How

**How to easily Generate Random Numbers in Java,** Learn how to generate random number in java using Java Random class and Math. Program: Generate 10 random numbers between 0 to 100. Random number can be generated using two ways. java.util. 30) Stack Heap · 31) Inheritance · 32) Polymorphism · 33) Abstract Method & Class · 34) Java Python random.randrange () function used to generate the pseudo-random number between the given range of values. For example, you want to generate a random number between 10 to 50 then you can use this function. Goals of this lesson. In this lesson, you’ll learn how to: Get a random number in a range. There are multiple variants of random

**Solutions to Exercises,** A ragged array is a two-dimensional array in which each row can have a different Java supports implementation inheritance by providing reserved word extends. 3. even when the class no longer uses these constants, the interface must remain to Math's random() method returns a pseudorandom number between 0.0. # Solution: Using Math class ```java Min + (int)(Math.random() * ((Max - Min) + 1)) To get the values between your range you need to you need to multiply by the magnitude of the range, which in this case is ( Max - Min ). Since the random is exclusive on right limit we need to add 1. Now that random generates from 0.0 we need to add Min to the

##### Comments

- You have an infinite recursion that usually leads to Stack Overflow.
- Where does inheritance come into this?
- Is
`rand`

a reference to the class that contains your methods? If so, you have a infinite recursion as PM 77-1 said. - yeah I was getting the stack overflow error but im not sure how to go around it or how to not make it an infinite recursion
- None of our answers have dealt with the inheritance part of the question. @SeanLynch how does inheritance need to come into this?
- OP wants/thinks
`nextEven(30)`

should be an even number*"from 0 to 30 (including both those numbers)"*. You should address that in the answer too. - @Andreas I missed the including. Thanks.
- Rand is an instance of my own class
- Although your answer is correct, looping to skip odd numbers is bad for performance, considering that you can simply ask for numbers in half the range and multiply by 2 to get even-only numbers.
- Solve first. Optimise later. But I do like your optimisation.