Java: public static main error

[Dököll]

Does public static main encapsulate a class?

Meaning:

 
public static void main(String[] args) {
// public class Myclass
// code here to do other stuff
 
// Am I encapsulating the class here?  
 
System.out.println(className);
 
}
 
It probably does no make sense the way I am asking this.
 
 
 
 

I am getting a logical error when attempting to run code. Nothing happens.

Tell what you see. Thanks!

Dököll

[itgaurav198]

Does public static main encapsulate a class?

Meaning:

 
public static void main(String[] args) {
// public class Myclass
// code here to do other stuff
 
// Am I encapsulating the class here?  
 
System.out.println(className);
 
}
 
It probably does no make sense the way I am asking this.
 
 
 
 

I am getting a logical error when attempting to run code. Nothing happens.

Tell what you see. Thanks!

Dököll

Have u encapsulated your main function in a class?

[Dököll]

Have u encapsulated your main function in a class?

all attempted but nothing works. For now I have this:

 
public class Game 
{
    private Parser parser;
    private Room currentRoom;
    private View currentView;
 
 
 
public static void main(String[] args)
{
 
   Game game= new Game();
 
   game.start();
 
}
 
 

Encapsulating, or having the last braket further down did not work. Above says it cannot find symbol start()

Should the code still run using a compiler, perhaps that't it?

I believe main is there to give it the ability to be view in a browser.

[r035198x]

all attempted but nothing works. For now I have this:

 
public class Game 
{
    private Parser parser;
    private Room currentRoom;
    private View currentView;
 
 
 
public static void main(String[] args)
{
 
   Game game= new Game();
 
   game.start();
 
}
 
 

Encapsulating, or having the last braket further down did not work. Above says it cannot find symbol start()

Should the code still run using a compiler, perhaps that't it?

I believe main is there to give it the ability to be view in a browser.

The main method is the entry point of the program. Your game class does not have a method called start like the compiler said so you can't call it. You are also missing a closing bracket.

[JosAH]

all attempted but nothing works. For now I have this:

 
public class Game 
{
    private Parser parser;
    private Room currentRoom;
    private View currentView;
 
 
 
public static void main(String[] args)
{
 
   Game game= new Game();
 
   game.start();
 
}
 
 

Encapsulating, or having the last braket further down did not work. Above says it cannot find symbol start()

Should the code still run using a compiler, perhaps that't it?

I believe main is there to give it the ability to be view in a browser.

What you're doing is this: a Game object encapsulates a parser, a currentRoom
and a currentView; they're members of a Game class object. main() is just an
entry point to get your program going. It doesn't have anything to do with browsers.
When you start your Game class on the command line, the jvm checks whether
or not your Game class has a main() method with the correct signature; if so,
that's where your program starts. Your Game class doesn't have a 'start()' method
so javac starts whining at you for that.

I don't understand your last question: compilers have nothing to do with this.

kind regards,

Jos

ps. there's a syntax error in your class: add a last '}'

[Dököll]

What you're doing is this: a Game object encapsulates a parser, a currentRoom
and a currentView; they're members of a Game class object. main() is just an
entry point to get your program going. It doesn't have anything to do with browsers.
When you start your Game class on the command line, the jvm checks whether
or not your Game class has a main() method with the correct signature; if so,
that's where your program starts. Your Game class doesn't have a 'start()' method
so javac starts whining at you for that.

I don't understand your last question: compilers have nothing to do with this.

kind regards,

Jos

ps. there's a syntax error in your class: add a last '}'

Thanks to you both, I think I read the book wrong, I thought start was a reservred word/verb which when called, whatever if within the main { } would execute in a browser. That main was the engine that makes available the results of the code, when compiled, in a browser.

So I thought having main in the code, I was having a problem when the code ran through BlueJ, the compiler I am using.

But, just as I would for an HTML file, where I'd click and I get data through a browser, shouldn't public static void main do it. It sounds like that what the book is saying. I'll look again. I think I need to really understand what main does... But tell what you think. Thanks again for replying, guys, really nice.

In a bit!

Dököll

[JosAH]

But, just as I would for an HTML file, where I'd click and I get data through a browser, shouldn't public static void main do it. It sounds like that what the book is saying. I'll look again. I think I need to really understand what main does... But tell what you think. Thanks again for replying, guys, really nice.

In a bit!

Dököll

You really think too much of main; it is just a static method. When you start up
the JVM giving it a class; the JVM tries to load that class and searches for a
static void main(String[] args) { ... } method. If it finds it it calls it given the rest
of the command line arguments. From there the entire circus starts.

When you want to do things in a browser you either create an Applet or JApplet
(check the API documentation). They run on the client side in a Java enabled
browser or you have to create 'server pages' JSPs and/or Servlets that run on a
server and pass html pages to the browser on the client side.

kind regards,

Jos

[Dököll]

You really think too much of main; it is just a static method. When you start up
the JVM giving it a class; the JVM tries to load that class and searches for a
static void main(String[] args) { ... } method. If it finds it it calls it given the rest
of the command line arguments. From there the entire circus starts.

When you want to do things in a browser you either create an Applet or JApplet
(check the API documentation). They run on the client side in a Java enabled
browser or you have to create 'server pages' JSPs and/or Servlets that run on a
server and pass html pages to the browser on the client side.

kind regards,

Jos

Yes I think I am...

I will be doing more reading on that. I am going to check the API documentation as you said, although I suspect it may be above my head. Will keep you posted.

You have a wonderful week-end!

Thanks!

Dököll

[JosAH]

Yes I think I am...

I will be doing more reading on that. I am going to check the API documentation as you said, although I suspect it may be above my head.

It isn't; the API documentation simply documents all the classes in the Java SE
core set. It also documents every method and member variable. You should
have the API docs open next to your IDE or whatever. There's no need to guess
or hack or whatever; when in doubt: read the API docs first.

In the Java Articles index you'll find a link from where you can download the
entire API documentation. Download it, it's worth every single byte it takes on
your hard disk drive.

kind regards,

Jos

[Dököll]

It isn't; the API documentation simply documents all the classes in the Java SE
core set. It also documents every method and member variable. You should
have the API docs open next to your IDE or whatever. There's no need to guess
or hack or whatever; when in doubt: read the API docs first.

In the Java Articles index you'll find a link from where you can download the
entire API documentation. Download it, it's worth every single byte it takes on
your hard disk drive.

kind regards,

Jos

Every single byte, eh:-)

Will take a closer look...

In a bit!

Dököll