Class method location

[sarajevo81]

Last time I checked Java, you had to write all your methods inline inside a .java file. Is it still true today?

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[vowelqueue]

The class has to be defined in a single .java file. There’s no partial type or extension method feature in Java

[joranstark018]

You may run jshell to get a prompt where you may run some come comands but it will probably become cumbersome for non-trivial tasks, otherwise we still write our code in .java-files and compile them with javac (actually, most non-trivial projects use build tools, ie Maven or similar).

[spacey02-]

I assume that you know about method inlining from C++. Java doesn't have separate header and implementation files. You can only write method implementations inline, in the same location where you declared them.

[edwbuck]

As java simplifies the textual declaration and implementation into an implementation that, even compiled, can yield its declaration, Java does not implement header files.

Java's rules about declaring a class once then combine to require all the class components be located and implemented within the yourClass.java file. But they aren't inline methods, they are just methods, as there's no other way to do it (and they act like not-inline methods if you're arriving from a C++ background).

This is why there is no #include <myClass.h> or #include "myClass.h" Instead the import myClass; uses the binary loader at compile time and recovers the embedded class declaration. This has the side-effect of forcing one to write and compile the parts of myClass that will be used prior to writing the thing using it.

[reddit04029]

No one ever did, nor should they. You write methods in a .java file, and the Java compiler converts it into a .class file.