[Java] Random number generation method (Random)

Here is an example of a program that easily generates random numbers in Java.

Integer type (numbers from 0)

int r = new java.util.Random().nextInt(* Upper limit of random numbers to be generated);

If you have import java.util. * At the beginning of the source, you can also write as follows.

int r = new Random().nextInt(* Upper limit of random numbers to be generated);

Reference: [Specifications of java.util.Random # nextInt (int)

Decimal type (pattern that generates random numbers from 0 to 1)

double r = Math.random();

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