package

[Ankit Neekhra]

if we create user define package. in this package we define several classes
my question is which name we should save the program

[Campbell Ritchie]

Welcome to the Ranch

You save the classes in files with their names. You can save them in a .src (for source) folder, or (probably better) in folders matching the package hierarchy. The Java Tutorials might help you.

[Sunil Sunny]

Welcome to this Forum
If your program contains more than one classes . then you must only declare one public class only and name save that with your publiclassname.java . Hope this will also help you.

[Anayonkar Shivalkar]

Sunil Sunny wrote: Welcome to this Forum
If your program contains more than one classes . then you must only declare one public class only and name save that with your publiclassname.java . Hope this will also help you.

Are you talking about single file? Ideal practice is - create a different file for each class. That way, it becomes easy to maintain the application.

[Manoj Kumar Jain]

Sunil Sunny wrote: Welcome to this Forum
If your program contains more than one classes . then you must only declare one public class only and name save that with your publiclassname.java . Hope this will also help you.

If you are having muliple classes in single file you are not required to must have a public class. All classes can have default access modifier.

[Campbell Ritchie]

Sunil Sunny wrote: . . . If your program contains more than one classes . then you must only declare one public class only and name save that with your publiclassname.java . . . .

Not quite accurate; the other two people posting have given the correct answers.