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jrunscript.1	5.16 KB	-rw-r--r--
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Code Editor : jrunscript.1

.\" Copyright (c) 2006, 2018, Oracle and/or its affiliates. All rights reserved.
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.\"
.TH "JRUNSCRIPT" "1" "2021" "JDK 17" "JDK Commands"
.hy
.SH NAME
.PP
jrunscript \- run a command\-line script shell that supports interactive
and batch modes
.SH SYNOPSIS
.PP
\f[B]Note:\f[R]
.PP
This tool is \f[B]experimental\f[R] and unsupported.
.PP
\f[CB]jrunscript\f[R] [\f[I]options\f[R]] [\f[I]arguments\f[R]]
.TP
.B \f[I]options\f[R]
This represents the \f[CB]jrunscript\f[R] command\-line options that can
be used.
See \f[B]Options for the jrunscript Command\f[R].
.RS
.RE
.TP
.B \f[I]arguments\f[R]
Arguments, when used, follow immediately after options or the command
name.
See \f[B]Arguments\f[R].
.RS
.RE
.SH DESCRIPTION
.PP
The \f[CB]jrunscript\f[R] command is a language\-independent command\-line
script shell.
The \f[CB]jrunscript\f[R] command supports both an interactive
(read\-eval\-print) mode and a batch (\f[CB]\-f\f[R] option) mode of
script execution.
By default, JavaScript is the language used, but the \f[CB]\-l\f[R] option
can be used to specify a different language.
By using Java to scripting language communication, the
\f[CB]jrunscript\f[R] command supports an exploratory programming style.
.PP
If JavaScript is used, then before it evaluates a user defined script,
the \f[CB]jrunscript\f[R] command initializes certain built\-in functions
and objects, which are documented in the API Specification for
\f[CB]jrunscript\f[R] JavaScript built\-in functions.
.SH OPTIONS FOR THE JRUNSCRIPT COMMAND
.TP
.B \f[CB]\-cp\f[R] \f[I]path\f[R] or \f[CB]\-classpath\f[R] \f[I]path\f[R]
Indicates where any class files are that the script needs to access.
.RS
.RE
.TP
.B \f[CB]\-D\f[R]\f[I]name\f[R]\f[CB]=\f[R]\f[I]value\f[R]
Sets a Java system property.
.RS
.RE
.TP
.B \f[CB]\-J\f[R]\f[I]flag\f[R]
Passes \f[I]flag\f[R] directly to the Java Virtual Machine where the
\f[CB]jrunscript\f[R] command is running.
.RS
.RE
.TP
.B \f[CB]\-l\f[R] \f[I]language\f[R]
Uses the specified scripting language.
By default, JavaScript is used.
To use other scripting languages, you must specify the corresponding
script engine\[aq]s JAR file with the \f[CB]\-cp\f[R] or
\f[CB]\-classpath\f[R] option.
.RS
.RE
.TP
.B \f[CB]\-e\f[R] \f[I]script\f[R]
Evaluates the specified script.
This option can be used to run one\-line scripts that are specified
completely on the command line.
.RS
.RE
.TP
.B \f[CB]\-encoding\f[R] \f[I]encoding\f[R]
Specifies the character encoding used to read script files.
.RS
.RE
.TP
.B \f[CB]\-f\f[R] \f[I]script\-file\f[R]
Evaluates the specified script file (batch mode).
.RS
.RE
.TP
.B \f[CB]\-f\ \-\f[R]
Enters interactive mode to read and evaluate a script from standard
input.
.RS
.RE
.TP
.B \f[CB]\-help\f[R] or \f[CB]\-?\f[R]
Displays a help message and exits.
.RS
.RE
.TP
.B \f[CB]\-q\f[R]
Lists all script engines available and exits.
.RS
.RE
.SH ARGUMENTS
.PP
If arguments are present and if no \f[CB]\-e\f[R] or \f[CB]\-f\f[R] option
is used, then the first argument is the script file and the rest of the
arguments, if any, are passed as script arguments.
If arguments and the \f[CB]\-e\f[R] or the \f[CB]\-f\f[R] option are used,
then all arguments are passed as script arguments.
If arguments \f[CB]\-e\f[R] and \f[CB]\-f\f[R] are missing, then the
interactive mode is used.
.SH EXAMPLE OF EXECUTING INLINE SCRIPTS
.RS
.PP
\f[CB]jrunscript\ \-e\ "print(\[aq]hello\ world\[aq])"\f[R]
.RE
.RS
.PP
\f[CB]jrunscript\ \-e\ "cat(\[aq]http://www.example.com\[aq])"\f[R]
.RE
.SH EXAMPLE OF USING SPECIFIED LANGUAGE AND EVALUATE THE SCRIPT FILE
.RS
.PP
\f[CB]jrunscript\ \-l\ js\ \-f\ test.js\f[R]
.RE
.SH EXAMPLE OF INTERACTIVE MODE
.IP
.nf
\f[CB]
jrunscript
js>\ print(\[aq]Hello\ World\\n\[aq]);
Hello\ World
js>\ 34\ +\ 55
89.0
js>\ t\ =\ new\ java.lang.Thread(function()\ {\ print(\[aq]Hello\ World\\n\[aq]);\ })
Thread[Thread\-0,5,main]
js>\ t.start()
js>\ Hello\ World

js>
\f[R]
.fi
.SH RUN SCRIPT FILE WITH SCRIPT ARGUMENTS
.PP
In this example, the \f[CB]test.js\f[R] file is the script file.
The \f[CB]arg1\f[R], \f[CB]arg2\f[R], and \f[CB]arg3\f[R] arguments are passed
to the script.
The script can access these arguments with an arguments array.
.RS
.PP
\f[CB]jrunscript\ test.js\ arg1\ arg2\ arg3\f[R]
.RE

${this.title}

Code Editor : jrunscript.1