Java IQ

JShell is a command-line tool introduced in Java 9 that allows developers to interactively evaluate and experiment with Java code snippets without having to write a complete Java program. Its purpose is to provide a quick and easy way for developers to test out code and ideas, explore APIs, and debug issues without the need to compile and run a full program.

With JShell, developers can quickly test small pieces of code and see the output immediately, making it a powerful tool for learning and experimenting with Java. It also provides access to the full power of the Java platform, including its vast collection of libraries and frameworks, allowing developers to explore and test new features and APIs easily.

Overall, the purpose of JShell is to improve developer productivity and make it easier to write high-quality Java code by providing a fast and efficient way to test and experiment with code snippets.

JShell can be used as a replacement for shell script?

While JShell can be used to execute simple tasks and run small scripts, it is not designed to replace shell scripts or other scripting languages such as Bash, Python, or Perl.

The primary purpose of JShell is to provide an interactive environment for quickly testing and experimenting with Java code, not for automating system-level tasks or performing complex file and system operations that are typically handled by shell scripts.

Shell scripts are well-suited for automating tasks that require a lot of system-level interactions, such as managing files, launching processes, and performing network operations. They are also more lightweight than Java programs, making them more suitable for quick one-off scripts and command-line tools.

In summary, while JShell can be useful for quickly testing Java code and exploring Java APIs, it is not intended to replace shell scripts or other scripting languages for automating system-level tasks.