Java – how to use math Random() gets the random number in the range

See English answer > math random,only generating a 0? 5

public class Tester{
    public static void main(String args[]){
        int size=52;
        while(size>0){
            int rando=(int)Math.random()*size;
            size--;
            System.out.println(rando);
        }
    }
}

My code prints out all zeros until the conditions of the while loop are met I want to know how to generate random integers between 0 and 52 I understand, math random(); There is a double, I think, type conversion problem thank you.

Solution

You can only project math random(). Its value is between 0 and 1 (excluding 1)

Throw out the whole expression: (int) (math. Random() * size);

BTW: your interval is only 0 to 51 (because 1.0 is excluded)

Use (int) (math. Random() * (size 1));, If you want 0... 52 as your interval