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How can we load a source code into JShell in Java 9?
JShell is an interactive tool for learning Java, and it is a REPL(Read-Evaluate-Print-Loop) that evaluates declarations, statements, and expressions.
While leaving a JShell session, we want to reuse the code previously entered into a new session. This can be done by using the command: /open [File_Path]. This command will load all code and internal commands found in file[File_Path] supplied as an option.
In the below code snippet, we can use the "/open [File_Path]" command to load source code from the directory with the ".jsh" extension.
C:\Users\User>jshell
| Welcome to JShell -- Version 9.0.4
| For an introduction type: /help intro
jshell> x
| Error:
| cannot find symbol
| symbol: variable x
| x
| ^
jshell> y
| Error:
| cannot find symbol
| symbol: variable y
| y
| ^
jshell> /list
jshell> /open C:\Users\User\Desktop\save.jsh
jshell> /list
1 : int x = 15;
2 : double y = 25.0;
3 : public int sum(int a, int b) {
return a + b;
}
jshell> x
x ==> 15
jshell> y
y ==> 25.0
jshell> int result = sum(5, 7)
result ==> 12
Updated on: 07-Apr-2020
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