# Random-Format Number? Pls advise

jay lai

Ranch Hand

Posts: 180

posted 12 years ago

I display the random number works so far just print out the random number, and make it positve.

Please advise

1. How do I format to get xxx-xxx-xxxx

2. How do I get the first set not including 8 , 9 and the sum of 3 digit in the second set < 742.

Your help is greatly appreciated.

-----------------------------------------------------------

import java.util.Random;

import java.text.*;

public class Telephone

{

public static void main (String [] args)

{

Random generator = new Random ();

int num , formatNum, num2;

num = generator.nextInt();

//formatNum = Math.abs(num);

NumberFormat nf = NumberFormat.getInstance();

num2 = nf.parse(formatNum);

System.out.println ("A random telephone number is " + num2);

}

}

Please advise

1. How do I format to get xxx-xxx-xxxx

2. How do I get the first set not including 8 , 9 and the sum of 3 digit in the second set < 742.

Your help is greatly appreciated.

-----------------------------------------------------------

import java.util.Random;

import java.text.*;

public class Telephone

{

public static void main (String [] args)

{

Random generator = new Random ();

int num , formatNum, num2;

num = generator.nextInt();

//formatNum = Math.abs(num);

NumberFormat nf = NumberFormat.getInstance();

num2 = nf.parse(formatNum);

System.out.println ("A random telephone number is " + num2);

}

}

Chris De Vries

Ranch Hand

Posts: 65

posted 12 years ago

You can generate each number in the sequence by itself, and then output the sequence in any format you want. For example:

Formatting the individual digits is easy, but the four digit sequence might be less that 1000, so you need to ensure a minimum of four digits. Use java.text.NumberFormat for that:

I hope this is helpful.

Chris

Formatting the individual digits is easy, but the four digit sequence might be less that 1000, so you need to ensure a minimum of four digits. Use java.text.NumberFormat for that:

I hope this is helpful.

Chris