Thread: phone number generator

import java.util.Random;
public class RandomPhoneNumber
{
public static void main (String[]args)
{Random generator = new Random();


/*write down the RandomNumber AreaCode1 AreaCode2 AreaCode3;
*choose the first 3
*choose the second 3
*choose the last four
*combine them
*/
int RandomNumber =0;
int Areacode;
int exchange;
int LastFour =0;
int thenumber = 1212;

System.out.println(" Enter the amount of numbers you want to receive: ");
RandomNumber = generator.nextInt();
Areacode = generator.nextInt();
if ( Areacode = 281 || int Areacode = 713 || int Areacode =832)
{ }

exchange =( int )(237 + Math.random() * 517);
while (LastFour != 1212)
LastFour = (int) (0 + Math.random() *9999);
String string1 = Integer.toString(thenumber);

System.out.println( "Phone numbers that resulted" + Areacode + "-" exchange + "-" LastFour);
System.out.println();

}
}






please help im desperate I need to make it work but don't know how!!!

Create a new java file named RandomPhoneNumber.java

Using Math.random(), write a program that creates and outputs random phone numbers of the form (xxx) xxx-xxxx. Include the parentheses and dashes in the output. The first three digits should randomly be 281, 713, 832. The second three should be between 237 and 754. The last four should range between 0 and 9999, excluding 1212. You will input from the keyboard the amount of phone numbers to generate.

Note: each digit does not have to be determined separately.


that is what I have to do and I don't know what else to do.. im completely lost

also thank you for telling me how it works

/*juliana Vargas
programing
10/29/2013
*/
import java.util.Random;
public class RandomPhoneNumber
{
public static void main (String[]args)
{Random generator = new Random();


/*write down the RandomNumber AreaCode1 AreaCode2 AreaCode3;
*choose the first 3
*choose the second 3
*choose the last four
*combine them
*/
int RandomNumber =0;
int exchange;
int LastFour =0;


System.out.println(" Enter the amount of numbers you want to receive: ");


String [] Areacode = {"713", "281", "832"};
System.out.format("The Java array length is %d", Areacode.length);
RandomNumber = generator.nextInt();
exchange =( int )(237 + Math.random() * 517);
while (LastFour != 1212)
LastFour = (int) (0 + Math.random() *9999);
System.out.println( "Phone numbers that resulted" +Areacode);


}
}


this is what I have now the thing is that my jcreator doesn't work it won't run ... but at least it shows me that is right... I have tried everything but still won't work

sorry didn't see it

I can't tell because my jcreator doesn't run... I don't know why... thank you very much for your help... I will work on it more tomorrow if it works I would be please to thank you.. have a great night.

this is the new one I made but at the end it wont give me the last four numbers and I cant input the amount of phone numbers

--- Update ---

/*juliana Vargas
programing
10/29/2013
*/
import java.util.Random;
public class RandomPhoneNumber
{
public static void main (String[]args)
{Random generator = new Random();


/*write down the RandomNumber AreaCode1 AreaCode2 AreaCode3;
*choose the first 3
*choose the second 3
*choose the last four
*combine them
*/

int RandomNumber =0;
int exchange;
int LastFour =0;
int number;
int num1 = 0;

System.out.println(" Enter the amount of numbers you want to receive: ");
number = generator.nextInt();

num1 = (int)(1+Math.random()*3);
if (num1 == 1)
num1 = 281;
System.out.printf(""+num1);
if (num1 == 2)
num1 = 713;
System.out.printf(""+num1);
if (num1 == 3)
num1 = 832;
System.out.printf(""+num1);

RandomNumber = generator.nextInt();

exchange =( int )(237 + Math.random() * 517);
RandomNumber = generator.nextInt();

while (LastFour == 1212)
LastFour = (int) (0 + Math.random() * 9999);
RandomNumber = generator.nextInt();

System.out.println( "Phone numbers that resulted " +"("+num1+")" +exchange +"-"+LastFour);


}
}

how what you mean sorry?.. how?

/*juliana Vargas
programing
10/29/2013
*/
import java.util.Random;
public class RandomPhoneNumber
{ 
 public static void main (String[]args)                  
 {Random generator = new Random();
 
 
  /*write down the RandomNumber AreaCode1 AreaCode2 AreaCode3;
   *choose the first 3
   *choose the second 3
   *choose the last four
   *combine them 
   */
 
  int RandomNumber =0;
  int exchange;
  int LastFour =0;
  int number;
  int num1 = 0;
 
    System.out.println(" Enter the amount of numbers you want to receive: ");
    number = generator.nextInt();
 
    num1 = (int)(1+Math.random()*3);
    if (num1 == 1)
     num1 = 281;
     System.out.printf(""+num1);
    if (num1 == 2)
     num1 = 713;
     System.out.printf(""+num1); 
    if (num1 == 3)
     num1 = 832; 
     System.out.printf(""+num1);  
 
    RandomNumber = generator.nextInt();
 
    exchange =( int )(237 + Math.random() * 517);
     RandomNumber = generator.nextInt();
 
    while (LastFour == 1212)
    LastFour = (int) (0 + Math.random() * 9999); 
    RandomNumber = generator.nextInt(); 
 
    System.out.println( "Phone numbers that resulted " +"("+num1+")" +exchange +"-"+LastFour);
 
 
 }
}

ohhh I see what you meant hopefully now its better

/*juliana Vargas
 programing
 10/29/2013
 */
 import java.util.Random;
 public class RandomPhoneNumber
 { 
 public static void main (String[]args) 
 {Random generator = new Random();
 
 
 /*write down the RandomNumber AreaCode1 AreaCode2 AreaCode3;
 *choose the first 3
 *choose the second 3
 *choose the last four
 *combine them 
 */
 
 int RandomNumber =0;
 int exchange;
 int LastFour =0;
 int number;
 int num1 = 0;
 
// command to input the amount of numbers I want...( it wont let me input anything)
 System.out.println(" Enter the amount of numbers you want to receive: ");
 number = generator.nextInt();
 
//use random to find the first 3 numbers
 num1 = (int)(1+Math.random()*3);
 if (num1 == 1)
 num1 = 281;
 System.out.printf(""+num1);
 if (num1 == 2)
 num1 = 713;
 System.out.printf(""+num1); 
 if (num1 == 3)
 num1 = 832; 
 System.out.printf(""+num1); 
 
 RandomNumber = generator.nextInt();
 
// use random to find the second 3 numbers
 exchange =( int )(237 + Math.random() * 517);
 RandomNumber = generator.nextInt();
 
//find the las 4 numbers except for 1212 (it will only give me  a zero)
 while (LastFour == 1212)
 LastFour = (int) (0 + Math.random() * 9999); 
 RandomNumber = generator.nextInt(); 
 
 System.out.println( "Phone numbers that resulted " +"("+num1+")" +exchange +"-"+LastFour);
 
 
 }
 }

--- Update ---

like this {num1 = 281;} ?

--- Update ---

hmm.. also for the while loop?