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Beginner code
Hi everyone,
I'm just starting to learn Java. I copied the following program from a textbook, but it doesn't seem to work for some reason. I'd appreciate your help.
Here's the code:
public class Hello {
public static void main(String[] args) {
System.out.println("Hello, world!");
}
}
Related threads:
Re: Beginner code
Please copy and paste here the full text of any error messages you get. Explain what you have done and what happens when you do it.
Have you read the tutorial that explains how to compile and execute java programs?
Lesson: The "Hello World!" Application (The Java™ Tutorials > Getting Started)
Click on the link for the system you are on.
If you don't understand my answer, don't ignore it, ask a question.
Re: Beginner code
what kind of IDE are you using?
if you are using notepad, I suggest you download an IDE such as Eclipse online. They have very easy tutorials on how to use them, and it makes programming much easier.
Here's a link: Eclipse Downloads
The second download is suitable for most programmers and students
other than the IDE, I don't see anything wrong with the code.
Re: Beginner code
If one is a beginner, as the original post would suggest, I would hesitate to recommend this advice. While IDE's do make things easier for more advanced programmers, there are many concepts which become hidden through an IDE and can only be learned by command line programming. Plus, this is suggestive that an IDE will solve the original issue, which we don't even know what it is.if you are using notepad, I suggest you download an IDE such as Eclipse online. They have very easy tutorials on how to use them, and it makes programming much easier.
Re: Beginner code
Seems like you havn't specified what package it should be in.
Re: Beginner code
@djl1990 Classes do not have to be in packages.
If you don't understand my answer, don't ignore it, ask a question.
Re: Beginner code
Hi Norm. Here is the error message I received:Originally Posted by Norm
xception in thread "main" java.lang.ExceptionInInitializerError
Caused by: java.lang.RuntimeException: Uncompilable source code - class Hello is public, should be declared in a file named Hello.java
at Hello.<clinit>(JavaApplication5.java:1)
Java Result: 1
I'll take a loot at the tutorial. I got the original program from a class textbook. I can't take the class right now, so I am reading the text as the next best option.
Re: Beginner code
Yes, I am very much a beginner. I got the code from a book I bought: Building Java Programs: A Back to Basics Approach, 2nd edition
by Stuart Reges and Marty Stepp.
Also, I downloaded BlueJ. I was able to get the code compiled, but couldn't get it to run. I apologize, but I'm still learning the definition of such terms as class and package as they relate to Java.
I know you're busy, so I appreciate your help. Java looks like a lot of fun!
Re: Beginner code
What is the name of the .java file? The compiler says what the problem is. Name the file: Hello.javaclass Hello is public, should be declared in a file named Hello.java
The compile was not successful. The above is a compiler error message.I was able to get the code compiled
You need to get rid of compiler errors before you can run the code.
If you don't understand my answer, don't ignore it, ask a question.
Re: Beginner code
-------------
How do I name the file?
Re: Beginner code
That depends on what OS you are on. Most OSs have a rename command. Find that and use it to rename the file. On windows, right click the file and select the Rename option. Type the new name over the old one.How do I name the file?
Or edit the existing file and save it with the new name.
If you don't understand my answer, don't ignore it, ask a question.
Re: Beginner code
Thanks for the help. I talked to a teacher at a local community college. She recommended the book Building Java™ Programs: A Back to Basics Approach, 2/e It looks good. I'm going to use BlueJ for the IDE. I finally found what looks like a good tutorial on how to use it:Creating and Running programs in BlueJ. I wish I could take a class on Java so I could talk to someone face-to-face, but that won't work with my schedule right now. Still, this forum looks good. I appreciate everyone's help.
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