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.TH "JRUNSCRIPT" "1" "2018" "JDK 13" "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