Confusion regarding CLASS in java

[Debis]

I have 2 questions:

1. Is it the norm that a Java program can only have One class?

2. Is a Class in Java always"Public"?

If any of your answers is a No, can you please show a simple example program with System.out.println().

I'm a beginner, so, sorry if these questions appear stupid to you.

Edited April 6, 2020 by Debis
Typo

[Ingolme]

Java programs almost always have many classes. If you don't have more than one class then you're not really taking advantage of Java's object-oriented nature and you might as well use a different programming language.

As a beginner, you should make all your classes public. There are cases where private or protected classes are better, but you need a lot of experience to identify them and the code for an example would be too long for a forum post.

[Debis]

Can you please elaborate with a small example of 2 classes and one main method? I just want to check the usage of curly braces of classes with respect to the main class.

[Ingolme]

Each class has to be in its own file and you can use import statements to load the files. A Java IDE will usually handle this for you. You can read more about it in the W3schools tutorials.

Project.class

public class Project {
    public static void main(String[] args) {
        Example example = new Example();
    }
}

Example.class

public class Example {
}

[Debis]

Excellent. Classes in different files. That's where my doubt was. Thanks dear.