How to re-execute existing snippets in JShell in Java 9?\\n

JShell is the first REPL tool introduced in Java 9. We can able to execute simple snippets in a command-line prompt by using JShell tool. We can start a JShell session by typing "jshell" command, stop the session by typing "/exit" command, and search for particular command by using "/help" command.

The "/reload" command can be used to re-execute all existing snippets in JShell. We can also remove all prior code from a JShell session by using the "/reset" command.

In the below code snippet, we have created a set of snippets.

jshell> 2+10 $1 ==> 12 jshell> String s = "Tutorialspoint" s ==> "Tutorialspoint" jshell> System.out.println("Tutorialspoint") Tutorialspoint jshell> int num1 = 25 num1 ==> 25 jshell> /1 2+10 $5 ==> 12 jshell> /2 String s = "Tutorialspoint"; s ==> "Tutorialspoint" jshell> /3 System.out.println("Tutorialspoint") Tutorialspoint jshell> /4 int num1 = 25; num1 ==> 25

In the below code snippet, we can apply the "/reload" command. Jshell tool re-executes all existing snippets and prints it.

jshell> /reload | Restarting and restoring state. -: 2+10 -: String s = "Tutorialspoint"; -: System.out.println("Tutorialspoint") Tutorialspoint -: int num1 = 25; -: 2+10 -: String s = "Tutorialspoint"; -: System.out.println("Tutorialspoint") Tutorialspoint -: int num1 = 25; -: int num1 = 25;

In the below code snippet, we can apply the "/reset" command to remove all prior code from a JShell session and prints "Resetting State".

jshell> /reset | Resetting state. jshell>