146 lines
4.2 KiB
Groff
Executable File
146 lines
4.2 KiB
Groff
Executable File
.\" Automatically generated by Pandoc 2.19.2
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.\" Define V font for inline verbatim, using C font in formats
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.\" that render this, and otherwise B font.
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.\}
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.TH "JRUNSCRIPT" "1" "2025" "JDK 24.0.2" "JDK Commands"
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.hy
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.SH NAME
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.PP
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jrunscript - run a command-line script shell that supports interactive
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and batch modes
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.SH SYNOPSIS
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.PP
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\f[B]Note:\f[R]
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.PP
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This tool is \f[B]experimental\f[R] and unsupported.
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It is deprecated and will be removed in a future release.
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.PP
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\f[V]jrunscript\f[R] [\f[I]options\f[R]] [\f[I]arguments\f[R]]
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.TP
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\f[I]options\f[R]
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This represents the \f[V]jrunscript\f[R] command-line options that can
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be used.
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See \f[B]Options for the jrunscript Command\f[R].
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.TP
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\f[I]arguments\f[R]
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Arguments, when used, follow immediately after options or the command
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name.
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See \f[B]Arguments\f[R].
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.SH DESCRIPTION
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.PP
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The \f[V]jrunscript\f[R] command is a language-independent command-line
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script shell.
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The \f[V]jrunscript\f[R] command supports both an interactive
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(read-eval-print) mode and a batch (\f[V]-f\f[R] option) mode of script
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execution.
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By default, JavaScript is the language used, but the \f[V]-l\f[R] option
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can be used to specify a different language.
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By using Java to scripting language communication, the
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\f[V]jrunscript\f[R] command supports an exploratory programming style.
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.PP
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If JavaScript is used, then before it evaluates a user defined script,
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the \f[V]jrunscript\f[R] command initializes certain built-in functions
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and objects, which are documented in the API Specification for
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\f[V]jrunscript\f[R] JavaScript built-in functions.
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.SH OPTIONS FOR THE JRUNSCRIPT COMMAND
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.TP
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\f[V]-cp\f[R] \f[I]path\f[R] or \f[V]-classpath\f[R] \f[I]path\f[R]
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Indicates where any class files are that the script needs to access.
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.TP
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\f[V]-D\f[R]\f[I]name\f[R]\f[V]=\f[R]\f[I]value\f[R]
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Sets a Java system property.
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.TP
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\f[V]-J\f[R]\f[I]flag\f[R]
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Passes \f[I]flag\f[R] directly to the Java Virtual Machine where the
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\f[V]jrunscript\f[R] command is running.
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.TP
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\f[V]-l\f[R] \f[I]language\f[R]
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Uses the specified scripting language.
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By default, JavaScript is used.
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To use other scripting languages, you must specify the corresponding
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script engine\[aq]s JAR file with the \f[V]-cp\f[R] or
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\f[V]-classpath\f[R] option.
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.TP
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\f[V]-e\f[R] \f[I]script\f[R]
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Evaluates the specified script.
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This option can be used to run one-line scripts that are specified
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completely on the command line.
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.TP
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\f[V]-encoding\f[R] \f[I]encoding\f[R]
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Specifies the character encoding used to read script files.
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.TP
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\f[V]-f\f[R] \f[I]script-file\f[R]
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Evaluates the specified script file (batch mode).
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.TP
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\f[V]-f -\f[R]
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Enters interactive mode to read and evaluate a script from standard
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input.
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.TP
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\f[V]-help\f[R] or \f[V]-?\f[R]
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Displays a help message and exits.
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.TP
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\f[V]-q\f[R]
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Lists all script engines available and exits.
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.SH ARGUMENTS
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.PP
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If arguments are present and if no \f[V]-e\f[R] or \f[V]-f\f[R] option
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is used, then the first argument is the script file and the rest of the
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arguments, if any, are passed as script arguments.
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If arguments and the \f[V]-e\f[R] or the \f[V]-f\f[R] option are used,
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then all arguments are passed as script arguments.
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If arguments \f[V]-e\f[R] and \f[V]-f\f[R] are missing, then the
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interactive mode is used.
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.SH EXAMPLE OF EXECUTING INLINE SCRIPTS
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.RS
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.PP
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\f[V]jrunscript -e \[dq]print(\[aq]hello world\[aq])\[dq]\f[R]
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.RE
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.RS
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.PP
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\f[V]jrunscript -e \[dq]cat(\[aq]http://www.example.com\[aq])\[dq]\f[R]
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.RE
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.SH EXAMPLE OF USING SPECIFIED LANGUAGE AND EVALUATE THE SCRIPT FILE
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.RS
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.PP
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\f[V]jrunscript -l js -f test.js\f[R]
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.RE
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.SH EXAMPLE OF INTERACTIVE MODE
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.IP
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.nf
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\f[CB]
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jrunscript
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js> print(\[aq]Hello World\[rs]n\[aq]);
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Hello World
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js> 34 + 55
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89.0
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js> t = new java.lang.Thread(function() { print(\[aq]Hello World\[rs]n\[aq]); })
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Thread[Thread-0,5,main]
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js> t.start()
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js> Hello World
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js>
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\f[R]
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.fi
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.SH RUN SCRIPT FILE WITH SCRIPT ARGUMENTS
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.PP
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In this example, the \f[V]test.js\f[R] file is the script file.
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The \f[V]arg1\f[R], \f[V]arg2\f[R], and \f[V]arg3\f[R] arguments are
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passed to the script.
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The script can access these arguments with an arguments array.
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.RS
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.PP
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\f[V]jrunscript test.js arg1 arg2 arg3\f[R]
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.RE
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