More than one class in a single file

Hi,
I am having two classes in one file. One is public and another one is internal. I am calling the internal class methods in some other files. If I compile the files(where I am calling the internal class methods) alone , I am getting compilation errors, If I compile whole package , I am not getting compilation errors. What is the reason. Anyone tell me.

First u mention ur code then i can tell u properly.That's completely unnecessary in this case. The explanation was clear enough.
may be u didn't write import statement in that class where u have to implement internal class methodModi, this is complete nonsense. The class would only be visible to other classes in the same package under the rules of Java, so the import statement would be redundant, and in any case it wouldn't solve the problem, as you would have discovered if you had tried it, which you obviously didn't.
@OP: the reason is that the compiler doesn't know where to find the source of the internal class when compiling the other classes that use it. Generally speaking you shouldn't do this, you should put the internal class into its own source file, unless the source file it's presently contained in is the only one that references the internal class. So, either put it into its own source file or make sure the existing source file is compiled before compiling the others.

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