Java random generation of digital methods

1, create the random type of object:

Random Random = new Random ();

Random Random = new Random (10010010);

Both of these are ways to create random objects, the first of which uses the default construction method, and is completely equivalent to the following code actions:

Random Random = new Random (System. Currenttimemillis ());

Rather, it is created using the current time as the seed number.

The second way is to create a seed number by specifying it yourself.

You can use either of these two methods as needed.

2. Generate Random Numbers:

Once we have created random objects, we can generate random numbers:

Generate random integers:

int k = Random.nextint ();

Generate Random long integers:

Long L = Random.nextlong ();

3, generate the specified range of numbers:

For example, to generate a random number between 0-10:

int k = Random.nextint ();

Int J = Math.Abs (k% 10);

First, we generate a random integer k, then use K and 10 to get the remainder, and finally use the ABS method of the math class to take the absolute value and obtain the random number between 0-10.

Get a random number between 0-15, like this:

int k = Random.nextint ();

Int J = Math.Abs (k% 15);

Get a random number between 10-20:

int k = Random.nextint ();

Int J = Math.Abs (k% 10) + 10;