Random class java class random number

Introduction Method 1 
2 public int nextInt (int maxValue) generated [0, a random integer maxValue) range, including 0, that does not contain maxValue; 
. 3 public Double nextDouble () generates a random decimal range [0,1), comprising 0.0, not It contains 1.0.

1 Random use: 
2 Import leader packet: packet belongs java.util.Random   
. 3 format to create an instance: Random variable name = new Random ();

/ * 
    Java reference has been some type of Random class, function, random number generating 
    steps: 
      1. Import package, Random class, also java.util folder 
      2. formula: create Random types of variables 
      . 3. Random Variables call class functions, random number generation 
      
      random class provides functionality, name nextInt () generates a random number, the result is an int 
      range appear random number function nextInt (write a integer) integer: range random out of 
      a random number the range of 0 - random nextInt (100) between the specified integer [0,99) 
      
      generating random floating point numbers: function name nextDouble () random number range [0.0,1.0) 
      
      random number: pseudo-random number, the virtual machine a person written algorithm generates out 
* / 
Import java.util.Random; 
public  class RandomDemo {
     public  static  void main (String [] args) {
        //     2. formula: create a variable of type Random 
       Random = RAN new newRandom ();
        // . 3. Random variable class function calling, generates a random number
        // Random class, random number generation function 
       int I = ran.nextInt ( 100 ); 
       the System. OUT .println (I) ;
        // ? question generates a random number, the range 1-100
        // the nextInt (100) + 0-99. 1 
       
       Double D = ran.nextDouble (); 
       the System. OUT .println (D);        
    } 
}

Here highlight some of generating random numbers specified range:

int ranNumber = ran.nextInt (max - min + 1) + min; // ranNumber would be assigned to a random number in a range of min and max [min, max]

 

// Java generates a random number within the specified range
 // int ranNumber ran.nextInt = (max - min +. 1) + min; // ranNumber would be assigned to a random number in a range of min and max [min, max]
 // example: generating a random number between [155,658] 
int ranNumber ran.nextInt = ( 504 ) + 155 ; 
the System. OUT .println (ranNumber);