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Thread: n00b having problems running code

  1. #1
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    Default n00b having problems running code

    Hi,

    I'm new to Java & programming in general (only done bash for 2 months). I downloaded Java 6 and the Eclipse IDE. I'm reading some books and watching tutorial vids online. However, no code I try works and I can't figure out why. I'm copying & pasting directly from the tutorials and I'm getting strange errors. Please see the attached screenshot.

    Thanks

    P.S. I use Ubuntu 10.04
    Attached Images Attached Images


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    Default Re: n00b having problems running code

    Could you highlight over the little red 'i' and what does it say or what is it hinting at you?

    Also have you declared what package this class is in?

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    Default Re: n00b having problems running code

    I cant make out some of the symbols you have could you copy and paste the code, the attatched picture is a bit blury

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    Default Re: n00b having problems running code

    Hi cha0s619,

    Please paste all of your code as djl request.

    Please not you should make your class 'public'.

    Regards,
    Chris
    chris[at]javaprogrammingforums[dot]com

    Prifysgol Bangor University, North Wales

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    Default Re: n00b having problems running code

    You are brave to try on your own. I don't do Eclipse. could you perhaps use notepad (included with Windows) to do a Hello World type program?

    Save as: Hello.java

    public class Hello
    {
         public static void main(String []args)
         {
              System.out.println("Hello World");
         }
    }

    If you have been knocking your head against this cor a couple of months, you have discovered that the compiler is looking for any excuse to fail. Upper/lower case makes a difference. Punctuation makes a difference, etc.

    to compile, if Hello.java would be in the same directory as javac.exe (the compiler) the syntax in DOS/command line window would be:

    javac Hello.java

    This will attempt to compile the file and produce a file called Hello.class javac will either come back with an error or return a prompt without a word, which signifies a successful compile. If it compiles successfully, you are free to run the program. You do this with

    java Hello


    If it successfully runs, it will repeat the message in the quotes, and terminate with returning to a command prompt.


    Can you get this far?

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    Default Re: n00b having problems running code

    Quote Originally Posted by djl1990 View Post
    Could you highlight over the little red 'i' and what does it say or what is it hinting at you?

    Also have you declared what package this class is in?
    ""Multiple markers at this time:
    -println cannot be resolved or is not a field
    -Syntax error, insert ";" to complete BlockStatements
    -Syntax error, insert "AssignmentOperator Expression" to complete Assignment""

    The code:

     
    public class Displayer {
     
    	public static void main(String args[]) {
    		System.out.println(“You’ll love Java!”);
    	}
    }

    I had left out making the class public, but even after correcting that it's still not working


    Thanks for the help so far

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    Default Re: n00b having problems running code

    Quote Originally Posted by meathead View Post
    You are brave to try on your own. I don't do Eclipse. could you perhaps use notepad (included with Windows) to do a Hello World type program?

    Save as: Hello.java

    public class Hello
    {
         public static void main(String []args)
         {
              System.out.println("Hello World");
         }
    }

    If you have been knocking your head against this cor a couple of months, you have discovered that the compiler is looking for any excuse to fail. Upper/lower case makes a difference. Punctuation makes a difference, etc.

    to compile, if Hello.java would be in the same directory as javac.exe (the compiler) the syntax in DOS/command line window would be:

    javac Hello.java

    This will attempt to compile the file and produce a file called Hello.class javac will either come back with an error or return a prompt without a word, which signifies a successful compile. If it compiles successfully, you are free to run the program. You do this with

    java Hello


    If it successfully runs, it will repeat the message in the quotes, and terminate with returning to a command prompt.


    Can you get this far?
    Yes! This works. Thanks. But how do I get it to work in Eclipse? I tried some code in NetBeans earlier and it was working as well.

  8. #8
    Senile Half-Wit Freaky Chris's Avatar
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    Default Re: n00b having problems running code

    Hi cha0s619,

    You may find that you have an "invalid" character in your Java program you were trying to compile in eclipse. Looking at this line,
    System.out.println(“You’ll love Java!”);

    Edit: see how the syntax highlighter hates those characters!

    notice the ” character, this is not the same as " make sure you are using " and avoid copying code from websites/pdfs/.docs

    I hope this helps you resolve the problem with Eclipse, if it doesn't let us know .

    Regards,
    Chris
    chris[at]javaprogrammingforums[dot]com

    Prifysgol Bangor University, North Wales

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    Default Re: n00b having problems running code

    Quote Originally Posted by Freaky Chris View Post
    Hi cha0s619,

    You may find that you have an "invalid" character in your Java program you were trying to compile in eclipse. Looking at this line,
    System.out.println(“You’ll love Java!”);

    Edit: see how the syntax highlighter hates those characters!

    notice the ” character, this is not the same as " make sure you are using " and avoid copying code from websites/pdfs/.docs

    I hope this helps you resolve the problem with Eclipse, if it doesn't let us know .

    Regards,
    Chris
    Thanks it's working now.

  10. #10
    Senile Half-Wit Freaky Chris's Avatar
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    Default Re: n00b having problems running code

    Hi cha0s619,

    Glad that solved your problem, would you please mark this thread as solved.


    Thanks,
    Chris
    chris[at]javaprogrammingforums[dot]com

    Prifysgol Bangor University, North Wales

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    Default Re: n00b having problems running code

    Quote Originally Posted by Freaky Chris View Post
    Hi cha0s619,

    You may find that you have an "invalid" character in your Java program you were trying to compile in eclipse. Looking at this line,
    System.out.println(“You’ll love Java!);

    Edit: see how the syntax highlighter hates those characters!

    notice the ” character, this is not the same as " make sure you are using " and avoid copying code from websites/pdfs/.docs

    I hope this helps you resolve the problem with Eclipse, if it doesn't let us know .

    Regards,
    Chris
    interesting solution and it works

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