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.TH "JINFO" "1" "2026" "JDK 28\-ea" "JDK Commands"
.SH NAME
jinfo \- generate Java configuration information for a specified Java
process
.SH SYNOPSIS
\f[B]Note:\f[R] This command is experimental and unsupported.
.PP
\f[CR]jinfo\f[R] [\f[I]option\f[R]] \f[I]pid\f[R]
.TP
\f[I]option\f[R]
This represents the \f[CR]jinfo\f[R] command\-line options.
See \f[B]Options for the jinfo Command\f[R].
.TP
\f[I]pid\f[R]
The process ID for which the configuration information is to be printed.
The process must be a Java process.
To get a list of Java processes running on a machine, use either the
\f[CR]ps\f[R] command or, if the JVM processes are not running in a
separate docker instance, the \f[B]jps\f[R] command.
.SH DESCRIPTION
The \f[CR]jinfo\f[R] command prints Java configuration information for a
specified Java process.
The configuration information includes Java system properties and JVM
command\-line flags.
.PP
This command is unsupported and might not be available in future
releases of the JDK.
In Windows Systems where \f[CR]dbgeng.dll\f[R] is not present, the
Debugging Tools for Windows must be installed to have these tools work.
The \f[CR]PATH\f[R] environment variable should contain the location of
the \f[CR]jvm.dll\f[R] that\(aqs used by the target process or the
location from which the core dump file was produced.
.PP
If the target JVM is started with an alternate temporary file location,
\f[CR]jinfo\f[R] must use the same temporary file location for
communication; this is true by default but see the
\f[B]\f[CB]\-XX:AltTempDir\f[B]\f[R] option.
.SH OPTIONS FOR THE JINFO COMMAND
\f[B]Note:\f[R]
.PP
If none of the following options are used, both the command\-line flags
and the system property name\-value pairs are printed.
.TP
\f[CR]\-flag\f[R] \f[I]name\f[R]
Prints the name and value of the specified command\-line flag.
.TP
\f[CR]\-flag\f[R] [\f[CR]+\f[R]|\f[CR]\-\f[R]]\f[I]name\f[R]
Enables or disables the specified Boolean command\-line flag.
.TP
\f[CR]\-flag\f[R] \f[I]name\f[R]\f[CR]=\f[R]\f[I]value\f[R]
Sets the specified command\-line flag to the specified value.
.TP
\f[CR]\-flags\f[R]
Prints command\-line flags passed to the JVM.
.TP
\f[CR]\-sysprops\f[R]
Prints Java system properties as name\-value pairs.
.TP
\f[CR]\-h\f[R] or \f[CR]\-help\f[R]
Prints a help message.