Should this code work in NetBeans?

[andrew dale]

Heres the code:

class DrumKit {
   
        boolean topHat = true;
        boolean snare = true;
           
  void playTopHat(){
        System.out.println("ding ding da-ding");
    }
  
   void playSnare(){
        System.out.println("bang bang da-bang");
    }
    class DrumKitTestDrive{
  
           public static void main(String [] args) {
                 
        DrumKit d = new DrumKit();
        d.playSnare();
        d.snare = false;
        d.playTopHat();
        
        if (d.snare ==true){
            d.playSnare();
        }
           
        }
 
                
         
    }
    }

It was part of Head First Java book, code magnet test chapter 2.

I also have a question or two about it:

boolean Tophat = true;
boolean snare = true;

I thought boolean was just to get a True/False answer... What does that mean when you making it = to true?

Thank you. This forum and everyone apart of it has been a godsend to me.

edit-------

This is what I get when I run the project


run:
java.lang.NoSuchMethodError: main
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" Java Result: 1
BUILD SUCCESSFUL (total time: 3 seconds)

[Campbell Ritchie]

Yes, you can set a boolean to true or false like that.

I would prefer to see if (b) ..., not if (b == true) ... ==true and ==false should never, in my opinion, be used.

You would need a class with a main method, and the main method calls the other code.

[andrew dale]

Campbell Ritchie wrote:Yes, you can set a boolean to true or false like that.

I would prefer to see if (b) ..., not if (b == true) ... ==true and ==false should never, in my opinion, be used.

You would need a class with a main method, and the main method calls the other code.

Ok, so you cant get the true/false result without boolean is that what your saying?

I also don't understand what you mean by I need a class with a main method? Do i have to create a separate file? If you can elaborate it would be greatly appreciated.

[Rob Spoor]

andrew dale wrote:This is what I get when I run the project


run:
java.lang.NoSuchMethodError: main
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" Java Result: 1
BUILD SUCCESSFUL (total time: 3 seconds)

That's probably because you are trying to run class DrumKit, whereas you should run class DrumKit.DrumKitTestDrive - that's the class with the main method.

[Seetharaman Venkatasamy]

Campbell Ritchie wrote:
I would prefer to see if (b) ..., not if (b == true) ...

Correct! because sometime by mistake you may type if(b = true) and also if(b) is looks better than if(b == true) . is not it?

[Campbell Ritchie]

andrew dale wrote: . . . Ok, so you cant get the true/false result without boolean is that what your saying? . . .

Not at all. The reserved words true and false are boolean literals, which means they count as booleans themselves.

[Jesper de Jong]

Did you really mean to put the class DrumKitTestDrive inside class DrumKit, or is that a mistake?