Need-Compiling-Help :)

Question

Hi, I am new, and I bought a book in 96/97 about Java, and finally gotten round to it lol! Yes its old, but its all I have at the moment, and so far I have some trouble compiling its little sample programs, before I found out what was wrong with my background in other langauges, but im stuck on this one any help would be much appreciated here it is with the error I get.
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.");
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();
I get the error: Exception in thread "main" java.lang.NoClassDefFoundError: motorcycle/class
lol please help :) Im using latest JDK stuff :)

Answer 1

I compiled ur code and i found no problem with it. I think the problem is ur process of compilation. Are you using command line for compilation? There are lots of java IDE out there that can help you not worry about the compilation process such as Forte, JCreator and many more.
Anyways, if you are still curious how to compile ur code in command line. Try this and tell me how you did:
compile:
c:\ur_current_directory>c:\j2sdk1.4.0\bin\javac Motorcycle.java
or
c:\ur_current_directory>c:\j2sdk1.4.0\bin\javac -classpath . Motorcycle.java
NOTE: . (dot) there signifies current directory
to run:
c:\ur_current_directory>c:\j2sdk1.4.0\bin\java Motorcycle
or
c:\ur_current_directory>c:\j2sdk1.4.0\bin\javac -cp . Motorcycle.java
Hope this helps