How can I split a class into 2 files?

I converted a C++ program to Java recently and it works fine, but I ran into a problem.
One file is very large and I need to add more functionality. Unlike with C++ where you can just put new functions in another file, I don't see a way to do it in Java.
I made another file, and therefore another class, but the compiler complains that it can't call a static function from non-static context. (I did not declare it static so I guess it's assuming it) But I understand why. So I made the new class "extend" the old one so "this" would exist but that doesn't work -- Is it because the new class is a subclass of the original class?
There must be a way to do this. But I don't see what is likely obvious. HELP! And thanks.

JavaIsBetterThanCPP wrote:
There must be a way to do this. But I don't see what is likely obvious. HELP! And thanks.Unfortunately Java has no concept of "partial classes" like C# has. Generally, however, a class that is large enough to split up into separate files is either one class that should be modularized further into separate classes, or it already is modularized and all that code is the result of many inner classes. What some people do is promote those inner classes to top-level members in their own file, and mark them as package-private. Using a package you can basically have two classes that know everything about each other and have full access to each other.
But personally, and until I see justification otherwise, semantics in Java being unbreakingly tied to a certain file structure and naming is the most bonehead and, frankly, non-Java thing about Java.
There's probably a pre-processor out there that will let you split a class into multiple files and will combine them into a single source file just-in-time to pass to the compiler.

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Solved!
Go to Solution.
Attachments:
scancode_topost.vi ‏129 KB

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                    System.out.println("ERROR while writing to Properties File: "+e);
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               currentdatum = currentdatum+"0"+date;
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               currenttime = currenttime+hours+seperator;
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               currenttime = currenttime+"0"+minutes+seperator;
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               currenttime = currenttime+"0"+seconds;
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               currenttime = currenttime+seconds;
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How can I split a class into 2 files?

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