Java Algorithms How to - Generate random number with restrictions

Question

We would like to know how to generate random number with restrictions.

Answer

/*w  w w.jav a  2  s  .co  m*/
import java.util.Random;

public class Main {
  public static void main(String[] args) {
    Random num = new Random();
    int num0, num1, num2, num3, num4, num5, num6, num7;

    num0 = num.nextInt(7) + 1;
    num1 = num.nextInt(8);
    num2 = num.nextInt(8);
    num3 = num.nextInt(643) + 101;
    num4 = num.nextInt(10);
    num5 = num.nextInt(10);
    num6 = num.nextInt(10);
    num7 = num.nextInt(10);

    String randnum = "A random phone number: ";
    System.out.print(randnum);
    System.out.print(num0);
    System.out.print(num1);
    System.out.print(num2);
    System.out.print("-" + num3 + "-");
    System.out.print(num4);
    System.out.print(num5);
    System.out.print(num6);
    System.out.println(num7);
  }
}

The code above generates the following result.