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Thread: Help for java beginner

  1. #1
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    Question Help for java beginner

    import java.util.Scanner;
    2
    3 public class HexToDecimalConversion {
    4 /** Main method */
    5 public static void main(String[] args) {
    6 // Create a Scanner
    7 Scanner input = new Scanner(System.in);
    8
    9 // Prompt the user to enter a string
    10 System.out.print("Enter a hex number: ");
    11 String hex = input.nextLine();
    12
    13 System.out.println("The decimal value for hex number "
    14 + hex + " is "+ );
    15 }
    16
    17 public static int hexToDecimal(String hex) {
    18 int decimalValue = 0;
    19 for (int i = 0; i < hex.length(); i++) {
    20 char hexChar = hex.charAt(i);
    21 decimalValue = decimalValue * 16 + hexCharToDecimal(hexChar);
    22 }
    23
    24 return decimalValue;
    25 }
    26
    27public static int hexCharToDecimal(char ch) {
    28 if (ch >= 'A' && ch <= 'F')
    29 return 10 + ch - 'A';
    30 else // ch is '0', '1', ..., or '9'
    31 return ch - '0';
    32 }
    33 }



    the above code implements the hexToDecimal(String
    hexString) method, which converts a hex string into a decimal number. Implement
    the hexToDecimal method to throw a NumberFormatException if the
    string is not a hex string.


  2. #2
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    Default Re: Help for java beginner

    Please don't post multiple copies of the same question. I deleted your duplicate thread.
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  3. #3
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    Default Re: Help for java beginner

    Also, please see the link in my signature on asking questions the smart way before you post again. For example, what's your actual question? Where are you stuck? Simply dumping your homework assignment here is not going to get you very far.
    Useful links: How to Ask Questions the Smart Way | Use Code Tags | Java Tutorials
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    Default Re: Help for java beginner

    To add to the advice given by Kevin, here's some recommended reading: How to Help Yourself Get Help

  5. #5
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    Default Re: Help for java beginner

    Its not an homework assignment ,i started learning java and was stuck with a question that i am trying to do .So just asked for help.That's it

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    Crazy Cat Lady KevinWorkman's Avatar
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    Default Re: Help for java beginner

    Quote Originally Posted by sarasaleem View Post
    Its not an homework assignment ,i started learning java and was stuck with a question that i am trying to do .So just asked for help.That's it
    Okay, that's fine, but that doesn't make it any easier to answer a question that has not been asked.
    Useful links: How to Ask Questions the Smart Way | Use Code Tags | Java Tutorials
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    Default Re: Help for java beginner

    Anyways thanks for your advice i already solved it by myself .

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