Thread: 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

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?

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

Hi cha0s619,

Please paste all of your code as djl request.

Please not you should make your class 'public'.

Regards,
Chris

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?

Originally Posted by djl1990

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

Originally Posted by meathead

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.

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

Originally Posted by Freaky Chris

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.

Hi cha0s619,

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


Thanks,
Chris

Originally Posted by Freaky Chris

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