.java file importance

Integration and Hardware

tysonzero

in Integration and Hardware • 1 year ago

when i compile an applet it creates a .jar file a .html file and a bunch of pde files which makes sense.

.jar is for the application

.html is too run it in browser

and

.pde is too publish my code as well

but what is the significance of the .java file? i removed it from the applet and it still ran ok? should i leave it in the applet to avoid causing problems or is it just there to show all of my code in one place or something? I really don't understand what its used for.

Replies(2)

PhiLho

Re: .java file importance

1 year ago

Processing code isn't really Java, but a dialect. When you hit run, or export the application, all the .pde files are gathered into a real Java file, this .java one, by a pre-processor that changes #ABCDEF to a color coding, int(val) to a real function call, etc., wraps the sketch in a Java class and so on. Then it compiles the .java file to .class files and run it / package it in a jar.
So, no, you don't really need this file online. Note it is useful because stacktraces of runtime errors (NullPointerException, ArrayIndexOutOfBoundsException, etc.) refer to lines in this .java file.

tysonzero

Re: Re: .java file importance

1 year ago

Ok so for debugging its very useful but once your code is bug free or if you separately test it offline on your own you don't need it. That makes sense thank you so much!

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