How can we customize how JShell is launched in Java 9?

JShellis an interactiveREPLtool for executing and evaluating simple Java programs, such as variable declarations, statements , expressions, etc. p>

When the JShell tool starts, the code is preloaded by default. To display this code we simply start the command "/list -start". You can ask JShell to automatically load them on startup using the following command: "/set start [-retain] [Type]". The first option "-retain" tells JShell to record the[Type]required to start the next JShell session. If we don't specify, the default start can be started when opening a new session

/set start [-retain] -File /set start [-retain] -Default /set start [-retain] -none

• /set start [-retain] File:This command tells JShell that the file must be loaded on startup The content (the file contains the following code) createsvariables, methods, classes, etc.).
• /set start [-retain] -none:This command tells JShell not to load any code/commands on startup.
• /set start [-retain] -Default:This command resets the startup of JShell to its default value.

In the following code snippet, we can use the "/set start [-retain] -File强>" command,

jshell> /list -start s1 : import java.io.*; s2 : import java.math.*; s3 : import java.net.*; s4 : import java.nio.file.*; s5 : import java.util.*; s6 : import java.util.concurrent.*; s7 : import java.util.function.*; s8 : import java.util.prefs.*; s9 : import java.util.regex.*; s10 : import java.util.stream.*; jshell> /set start -retain save.jsh jshell> /exit | Goodbye C:\Users\User>jshell | Welcome to JShell -- Version 9.0.4 | For an introduction type: /help intro jshell> /list -start s1 : int x = 20; s2 : double y = 30; s3 : public int sum(int a, int b) { return a + b; } s4 : String str = "TutorialsPoint";

In the following code snippet, we can use the "/set start [-retain] -none" command.

jshell> /set start -retain -none jshell> /exit | Goodbye C:\Users\User>jshell | Welcome to JShell -- Version 9.0.4 | For an introduction type: /help intro jshell> /list -start

In the following code snippet, we can use the "/set start [-retain] -Default" command.

jshell> /set start -retain -default jshell> /exit | Goodbye C:\Users\User>jshell | Welcome to JShell -- Version 9.0.4 | For an introduction type: /help intro jshell> /list -start s1 : import java.io.*; s2 : import java.math.*; s3 : import java.net.*; s4 : import java.nio.file.*; s5 : import java.util.*; s6 : import java.util.concurrent.*; s7 : import java.util.function.*; s8 : import java.util.prefs.*; s9 : import java.util.regex.*; s10 : import java.util.stream.*;

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