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Thread: Help with Java Code.

  1. #1
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    Cool [SOLVED] Help with Java Code.

    Hi guys. Im having a bit of an issue with my java code here.
    Basically what this code should do is:

    1) Asks the user for their first name.
    2) Takes that first name and generates a random number from it based on its length.
    3) Take that number it generates from the length then prints it in the output as a CharAt();

    I guess what my problem is really is the random number generation at the end of the code for a number been 100 and 999. I am not sure whether I have done it correctly.
    Can anyone assist me with this.

    Regards
    Matt

    import java.util.Random;
    import java.util.Scanner;
     
    public class AS1Q2 {
     
    	public static void main(String[] args) {
     
    		Scanner scan = new Scanner (System.in);
     
    		String firstName;
     
    		System.out.println ("Enter Your First Name: "); // Using print line will allow the user to enter their name below the Console txt showing "Enter Your Name: "
    		firstName = scan.nextLine();
     
     
    		Random random = new Random(); // Generates first value for Letter conversion //
     
    		int nameGen1;
    		nameGen1= random.nextInt(firstName.length()); 
     
    		int nameGen2;
    		nameGen2 = random.nextInt(firstName.length()); 
     
    		int nameGen3;
    		nameGen3 = random.nextInt(firstName.length()); 
     
    		//Random genThree = new Random(); // Generates second value for Letter conversion - not required, left in as apart of Troubleshooting ---//
     
     
    		//Random genFour = new Random(); // Generates third value for Letter conversion  - not required, left in as apart of Troubleshooting ---//
     
     
     
    		//--------------------------Generates Last Three Numbers of Rego Between 100 and 999 -----------------------------------//
     
    		Random generator = new Random();
    		int randomEndNumber;
    		randomEndNumber = generator.nextInt(900) + 100 - 1;
     
    		//----Output---//
     
     
    		System.out.println("Your Registration Number is: "+firstName.toUpperCase().charAt(nameGen1)+""+firstName.toUpperCase().charAt(nameGen2)+""+firstName.toUpperCase().charAt(nameGen3)+" "+randomEndNumber);
     
     
    	}
     
    }
    Last edited by metalx66; March 16th, 2011 at 09:08 PM. Reason: Solved


  2. #2
    mmm.. coffee JavaPF's Avatar
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    Default Re: Help with Java Code.

    Hello metalx66. Welcome to the Java Programming Forums.

    This all looks correct to me. I have used System.out.println(); to see what values are being generated.

    To make sure the randomEndNumber is working correctly, try reducing the range.

    import java.util.Random;
    import java.util.Scanner;
     
    public class AS1Q2 {
     
    	public static void main(String[] args) {
     
    		Scanner scan = new Scanner (System.in); 
    		String firstName;
     
    		// Using print line will allow the user to enter their name below the Console txt showing "Enter Your Name: "
    		System.out.println ("Enter Your First Name: "); 
    		firstName = scan.nextLine();
     
    		// Generates first value for Letter conversion //
    		Random random = new Random(); 
     
    		int nameGen1;
    		nameGen1= random.nextInt(firstName.length()); 
    		System.out.println (nameGen1); 
     
    		int nameGen2;
    		nameGen2 = random.nextInt(firstName.length());
    		System.out.println (nameGen2); 
     
    		int nameGen3;
    		nameGen3 = random.nextInt(firstName.length());
    		System.out.println (nameGen3); 
     
    		// Generates second value for Letter conversion - not required, left in as apart of Troubleshooting ---//
    		//Random genThree = new Random(); 
     
    		 // Generates third value for Letter conversion  - not required, left in as apart of Troubleshooting ---//
    		//Random genFour = new Random();
     
     
    		//--------------------------Generates Last Three Numbers of Rego Between 100 and 999 -----------------------------------//
     
    		Random generator = new Random();
    		int randomEndNumber;
    		randomEndNumber = generator.nextInt(900) + 100 - 1;
    		System.out.println (randomEndNumber); 
     
    		//----Output---//
     
    		System.out.println("Your Registration Number is: "+firstName.toUpperCase().charAt(nameGen1)+""+firstName.toUpperCase().charAt(nameGen2)+""+firstName.toUpperCase().charAt(nameGen3)+" "+randomEndNumber);
     
    	}
     
    }
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  3. The Following User Says Thank You to JavaPF For This Useful Post:

    metalx66 (March 17th, 2011)

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