Java Generate Random Number Between Two Given Values

Question

I would like to know how to generate a random number between two given values   I am able to generate a random number with the following   Random r   new Random     for int i   0  i  lt  a length  i         for int j   0  j  lt  a i  length  j             a i  j    r nextInt               However  how can I generate a random number between 0 and 100  inclusive

User · Answer

Like this   Random random   new Random    int randomNumber   random nextInt upperBound - lowerBound    lowerBound

User · Answer

You could use e g  r nextInt 101   For a more generic  in between two numbers  use   Random r   new Random    int low   10  int high   100  int result   r nextInt high-low    low    This gives you a random number in between 10  inclusive  and 100  exclusive

User · Answer

Assuming the upper is the upper bound and lower is the lower bound  then you can make a random number  r  between the two bounds with   int r    int   Math random      upper - lower     lower

User · Answer

One can also try below   public class RandomInt        public static void main String   args              int n1   Integer parseInt args 0            int n2   Integer parseInt args 1            double Random           if  n1    n2                        if  n1  gt  n2                                Random   n2    Math random      n1 - n2                    System out println  Your random number is      Random                             else                               Random   n1    Math random      n2 - n1                       System out println  Your random number is     Random                           else               System out println  Please provide valid Range    n1       n2    are equal numbers

User · Answer

Use Random nextInt int    In your case it would look something like this   a i  j    r nextInt 101

User · Answer

int Random    int  Math random   100     if You need to generate more than one value  then just use  for loop for that   for  int i   1  i  lt   10   i                     int Random    int  Math random   100           System out println Random              If You want to specify a more decent range  like from 10 to 100   both are in the range     so the code would be       int Random  10     int  Math random    91          int Random    min value      int  Math random      Max - Min   1       Where min is the smallest value You want to be the smallest number possible to          generate and Max is the biggest possible number to generate

User · Answer

Java doesn t have a Random generator between two values in the same way that Python does  It actually only takes one value in to generate the Random  What you need to do  then  is add ONE CERTAIN NUMBER to the number generated  which will cause the number to be within a range  For instance   package RandGen   import java util Random   public class RandGen         public static Random numGen  new Random     public static int RandNum        int rand   Math abs  100  numGen nextInt 100         return rand     public static void main String  Args      System out println RandNum            This program s function lies entirely in line 6  The one beginning with  int rand      Note that Math abs   simply converts the number to absolute value  and it s declared as an int  that s not really important  The first  100  is the number I am ADDING to the random one  This means that the new output number will be the random number   100  numGen nextInt   is the value of the random number itself  and because I put  100  in its parentheses  it is any number between 1 and 100  So when I add 100  it becomes a number between 101 and 200  You aren t actually GENERATING a number between 100 and 200  you are adding to the one between 1 and 100

[java] Java Generate Random Number Between Two Given Values

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