Java How to Program, Early Objects, 11th Edition

25.14 How JShell Reinterprets Java for Interactive Use

In JShell:

• A main method is not required.

• Semicolons are not required on standalone statements.

• Variables do not need to be declared in classes or in methods.

• Methods do not need to be declared inside a class’s body.

• Statements do not need to be written inside methods.

• Redeclaring a variable, method or type simply drops the prior declaration and replaces it with the new one, whereas the Java compiler normally would report an error.

• You do not need to catch exceptions, though you can if you need to test exception handling.

• JShell ignores top-level access modifiers (public, private, protected, static, final)—only abstract (Chapter 10) is allowed as a class modifier.

• The synchronized ...