[5954] in java-interest
Re: tutorial question
daemon@ATHENA.MIT.EDU (Youngjin Roh)
Wed Mar 6 07:11:27 1996
Date: Wed, 6 Mar 1996 05:47:09 -0500 (EST)
From: Youngjin Roh <yroh@gamera.syr.edu>
To: "Brad Q. Lucht" <blucht@sound.net>
Cc: java-interest@java.sun.com, lemay@lne.com, virtual@rendezvous.com
In-Reply-To: <1.5.4b11.32.19960305041203.0035e2c0@sound.net>
Hi.
I think the main function is also in the class which is the "main" class
whose name is also same as your source file name. Java is different from
usual C program, so Java even doesn't have main function sometimes.
I am also novice in Java programming, so if I am wrong, please let me know.
Good luck.
> I am working through "Teach Yourself Java in 21 Days;" at this point it is
> more like 21 weeks.
>
> I have a question about error statements I receive when I compile an example:
>
> Motorcycle.java:1: Identifier expected.
> public static void main (String args[]) {
> ^
> Motorcycle.java:1: 'class' or 'interface' keyword expected.
> public static void main (String args[]) {
> ^
> 2 errors
>
> For the life of me, I can't see what is wrong here. Any explanation or
> guidance are appreciated
>
> Here is the example, as I have typed it in:
>
> public static void main (String args[]) {
> Motorcycle m = new Motorcycle();
> m.make = "yamaha RZ350";
> m.color = "yellow";
> System.out.println("Calling showAtts . . .");
> m.showAtts();
> System.out.println(". . . . . . . . .");
> System.out.println("Starting engine . . . ");
> m.startEngine();
> System.out.println(". . . . . . . . .");
> System.out.println("Calling showAtts . . .");
> m.showAtts();
> System.out.println(". . . . . . . . .");
> System.out.println("Starting engine . . . ");
> m.startEngine();
> }
> class Motorcycle {
>
> String make;
> String color;
> boolean engineState;
>
> void startEngine() {
> if (engineState == true)
> System.out.println("The engine is already on.");
> else {
> engineState = true;
> System.out.println("The engine is now on.");
> }
> }
>
> void showAtts() {
> System.out.println("This motorcycle is a "
> + color + " " + make);
> if (engineState == true)
> System.out.println("The engine is on.");
> else System.out.println("The engine is off.");
> }
> }
>
> -- Brad Lucht
> blucht@sound.net
> SD Engineering & Statistics
> Creative Thinking - Problem Solving
>
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>
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