Java How To Program, Late Objects, 11th Edition

25 Introduction to JShell: Java 9’s REPL for Interactive Java

Objectives

In this chapter you’ll:

• See how using JShell can enhance the learning and software development processes by enabling you to explore, discover and experiment with Java language and API features.

• Start a JShell session.

• Execute code snippets.

• Declare variables explicitly.

• Evaluate expressions.

• Edit existing code snippets.

• Declare and use a class.

• Save snippets to a file.

• Open a file of JShell snippets and evaluate them.

• Auto-complete code and JShell commands.

• Display method parameters and overloads.

• Discover and explore with the Java API documentation in JShell.

• Declare and use methods.

• Forward reference a method that has not yet been declared.

• See how JShell wraps exceptions. ...