How to load files into JShell session in Java 9?

JShell is a new command line Interactive REPL (Read-Evaluate-Print-Loop) Tool Introduced in Java 9 for evaluating declarations, statements and expressions written in Java. This tool also allows us to execute Java code snippets and get the results immediately.

Sometimes, we have written code in a java file and are able to execute it in JShell. To load files into the JShell tool, we can use the "/open" command.

For example, I created "Test.txt". "java" file in the "c://temp" folder. Here is the code:

<strong>String s1 = "TutorialsPoint";
String s2 = "Tutorix";
String s3 = s1 + s2;

int sum(int a, int b) {
   return a + b;
}

int divide(int a, int b) {
   return a / b;
}</strong>

Now we can load the "Test.java" file into JShell using the following command

<strong>C:\Users\User>jshell
| Welcome to JShell -- Version 9.0.4
| For an introduction type: /help intro

jshell> /open c:\temp\Test.java

jshell> /vars
|    String s1 = "TutorialsPoint"
|    String s2 = "Tutorix"
|    String s3 = "TutorialsPointTutorix"

jshell> /methods
|    int sum(int,int)
|    int divide(int,int)</strong>

" /open "The command has loaded the "Test.java" file into the session. The " /vars " command can be used to load variables into the session, and the " /methods " command can be used to load methods into the session.

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