Tuesday, June 11, 2013

How Do I Create A Random Number Within A Certain Limit? - Java ...


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    7 Replies - 100 Views - Last Post: Yesterday, 08:33 PM Rate Topic: -----

    #1 streek405 ?Icon User is offline

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    Posted Yesterday, 10:49 AM

    
  // this program works fine, BUT I want to know how to force the  // random number generator, ON LINE 14, to create a number within a certain limit, such as 0 to 10  // this program will create a random number and do a series of loops with the number you input  import java.util.Scanner;  class While2{  	public static void main(String[] args){ 	 		Scanner input = new Scanner(System.in); 	 		int random = (int)(Math.random() * 20); // if you dont put * SOMETHING then it will be default, 0 		 		// create while loop  		while(true){ 			System.out.println("Enter a number between 0 and 10: "); 			 			int number = input.nextInt(); 			 			if (random == number){ 				System.out.println("Your number matches the random number, " + random); 				break; // if u dont put this, it will keep asking you 				} 			else if (random > number) 				System.out.println("Sorry, but random ," + random + " is bigger than your number " + number); 			else  				System.out.println("Sorry, but your number is too high, compared to the random " + random); 		} 	 	} 	 }  

    This post has been edited by streek405: Yesterday, 10:51 AM


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    Replies To: How do I create a random number within a certain limit?

    #2 g00se ?Icon User is offline

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    Re: How do I create a random number within a certain limit?

    Posted Yesterday, 10:54 AM


    #3 Hqtitan ?Icon User is offline

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    Re: How do I create a random number within a certain limit?

    Posted Yesterday, 11:32 AM

    There's an API for a reason. It would serve you well to learn how to use it.

    http://docs.oracle.c...ase/6/docs/api/

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    #4 streek405 ?Icon User is offline

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    Re: How do I create a random number within a certain limit?

    Posted Yesterday, 07:25 PM

    View Postg00se, on 09 June 2013 - 10:54 AM, said:


    I dont fully understand that code...I tried running and compiling that code by itself, but I got an error.
    Here is the code that I tested :
    
 public class Random{  	public static void main(String[] args){ 	 		System.out.println(Random.ranInRangeInc(Integer.valueOf(args[0], 		Integer.valueOf(arg[1]))));	 		System.out.println(Random.ranInRangeInc(Double.valueOf(args[0], 		Double.valueOf(arg[1]))));	 	}  	public static int randInRangeInc(int min, int max){ 	 		return min + (int) (Math.random() * (max - min)); 	}  	public static int randInRangeInc(double min, double max){ 	 		return min + (int) (Math.random() * (max - min)); 	}  }      


    #5 schutzzz ?Icon User is online

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    Re: How do I create a random number within a certain limit?

    Posted Yesterday, 08:01 PM

    What's your error?


    #6 streek405 ?Icon User is offline

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    Re: How do I create a random number within a certain limit?

    Posted Yesterday, 08:05 PM

    View Postschutzzz, on 09 June 2013 - 08:01 PM, said:


    I have no error. I just want to know how to make the random number within a certain range. I mean, the random number could be a billion...but I want it to be like within, say, 0 and 20.

    #7 schutzzz ?Icon User is online

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    Re: How do I create a random number within a certain limit?

    Posted Yesterday, 08:07 PM

    lol, I mean you said you tried to run and compile the code but got an error. I was just curious. Do you have the arguments set in your options?


    #8 schutzzz ?Icon User is online

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    Re: How do I create a random number within a certain limit?

    Posted Yesterday, 08:33 PM

    I highly advise you not to name a class the same name as java.util's Random
    
 import java.util.Random;  public class Randoms {  	public static void main(String[] args){ 		System.out.println(randomNum(25, 50));	 	}  	public static int randomNum(int min, int max){ 		return min + (int) (Math.random() * (max - min)); 	}  } 

    This post has been edited by schutzzz: Yesterday, 08:33 PM


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