To use the jShell effectively, You must be able to create function so that you can test your functionality quickly and it will be really helpful when you are developing a complex logic in Java.
This tutorial will show you how to create a small function and call it from Jshell CLI and then How to modify the same function.
- Create a function using Jshell CLI also known as Java REPL
In above image,
Step 1: is initializing jshell
Step 2: We are creating normal java function with return value and argument and greeting function name and welcome message as function body, It will show us the output as
| created method greeting(String)
Step 3: This will call the function which we have just created and Output shows the name which we have passed is appended to the Welcome message.
$2 ==> "Welcome to Jshell function creation tutorial :-> yoUVcode"
2. Modify the existing function which we have just created.
As highlighted with yellow underline in above image, When you write function with same signature then it is not creating a new function, While it will modify the existing function and display the output respectively.
If you want to know, How to start Jshell please refer Java 9 : JShell (REPL) feature.