问题
In C# .net there is a provision to have two different class files and make them a single class using the keyword partial keyword.this helps it to keep [for ex]UI and logic seperate. of course we can have two classes to achieve this one for UI and other for logic. Can this be achieved in java some how?
回答1:
On source file splitting
No. Java source codes can not be split across multiple files.
From the Wikipedia article Comparison of Java and C Sharp
The Sun Microsystems Java compiler requires that a source file name must match the only public class inside it, while C# allows multiple public classes in the same file, and puts no restrictions on the file name. C# 2.0 and later allows a class definition to be split into several files, by using the partial keyword in the source code. In Java, a public class will always be in its own source file. In C#, source code files and logical units separation are not tightly related.
On separating logic and UI into their own classes
The two classes approach is a much better solution than the one-class-two-source approach in this case, because the separation is enforced in the design, not just physical separation in the source codes.
See also
- Separation of logic and UI
- oo question - mixing controller logic and business logic
- Why is good UI design so hard for some Developers?
来源：https://stackoverflow.com/questions/2764234/partial-classes-partial-class-file