{ "mode": "man", "parameter": "jstat", "section": "1", "url": "https://www.chedong.com/phpMan.php/man/jstat/1/json", "generated": "2026-06-16T05:30:43Z", "synopsis": "jstat [ generalOption | outputOptions vmid [ interval[s|ms] [ count ] ]\ngeneralOption\nA single general command-line option -help or -options. See General Options.\noutputOptions\nOne or more output options that consist of a single statOption, plus any of the -t, -h,\nand -J options. See Output Options.\nvmid\nVirtual machine identifier, which is a string that indicates the target JVM. The general\nsyntax is the following:\n[protocol:][//]lvmid[@hostname[:port]/servername]\nThe syntax of the vmid string corresponds to the syntax of a URI. The vmid string can\nvary from a simple integer that represents a local JVM to a more complex construction\nthat specifies a communications protocol, port number, and other implementation-specific\nvalues. See Virtual Machine Identifier.\ninterval [s|ms]\nSampling interval in the specified units, seconds (s) or milliseconds (ms). Default units\nare milliseconds. Must be a positive integer. When specified, the jstat command produces\nits output at each interval.\ncount\nNumber of samples to display. The default value is infinity which causes the jstat\ncommand to display statistics until the target JVM terminates or the jstat command is\nterminated. This value must be a positive integer.", "sections": { "NAME": { "content": "jstat - Monitors Java Virtual Machine (JVM) statistics. This command is experimental and\nunsupported.\n", "subsections": [] }, "SYNOPSIS": { "content": "jstat [ generalOption | outputOptions vmid [ interval[s|ms] [ count ] ]\n\ngeneralOption\nA single general command-line option -help or -options. See General Options.\n\noutputOptions\nOne or more output options that consist of a single statOption, plus any of the -t, -h,\nand -J options. See Output Options.\n\nvmid\nVirtual machine identifier, which is a string that indicates the target JVM. The general\nsyntax is the following:\n\n[protocol:][//]lvmid[@hostname[:port]/servername]\n\nThe syntax of the vmid string corresponds to the syntax of a URI. The vmid string can\nvary from a simple integer that represents a local JVM to a more complex construction\nthat specifies a communications protocol, port number, and other implementation-specific\nvalues. See Virtual Machine Identifier.\n\ninterval [s|ms]\nSampling interval in the specified units, seconds (s) or milliseconds (ms). Default units\nare milliseconds. Must be a positive integer. When specified, the jstat command produces\nits output at each interval.\n\ncount\nNumber of samples to display. The default value is infinity which causes the jstat\ncommand to display statistics until the target JVM terminates or the jstat command is\nterminated. This value must be a positive integer.\n", "subsections": [] }, "DESCRIPTION": { "content": "The jstat command displays performance statistics for an instrumented Java HotSpot VM. The\ntarget JVM is identified by its virtual machine identifier, or vmid option.\n", "subsections": [] }, "VIRTUAL MACHINE IDENTIFIER": { "content": "The syntax of the vmid string corresponds to the syntax of a URI:\n\n[protocol:][//]lvmid[@hostname[:port]/servername]\n\n\nprotocol\nThe communications protocol. If the protocol value is omitted and a host name is not\nspecified, then the default protocol is a platform-specific optimized local protocol. If\nthe protocol value is omitted and a host name is specified, then the default protocol is\nrmi.\n\nlvmid\nThe local virtual machine identifier for the target JVM. The lvmid is a platform-specific\nvalue that uniquely identifies a JVM on a system. The lvmid is the only required\ncomponent of a virtual machine identifier. The lvmid is typically, but not necessarily,\nthe operating system's process identifier for the target JVM process. You can use the jps\ncommand to determine the lvmid. Also, you can determine the lvmid on Solaris, Linux, and\nOS X platforms with the ps command, and on Windows with the Windows Task Manager.\n\nhostname\nA hostname or IP address that indicates the target host. If the hostname value is\nomitted, then the target host is the local host.\n\nport\nThe default port for communicating with the remote server. If the hostname value is\nomitted or the protocol value specifies an optimized, local protocol, then the port value\nis ignored. Otherwise, treatment of the port parameter is implementation-specific. For\nthe default rmi protocol, the port value indicates the port number for the rmiregistry on\nthe remote host. If the port value is omitted and the protocol value indicates rmi, then\nthe default rmiregistry port (1099) is used.\n\nservername\nThe treatment of the servername parameter depends on implementation. For the optimized\nlocal protocol, this field is ignored. For the rmi protocol, it represents the name of\nthe RMI remote object on the remote host.\n", "subsections": [] }, "OPTIONS": { "content": "The jstat command supports two types of options, general options and output options. General\noptions cause the jstat command to display simple usage and version information. Output\noptions determine the content and format of the statistical output.\n\nAll options and their functionality are subject to change or removal in future releases.\n", "subsections": [ { "name": "General Options", "content": "If you specify one of the general options, then you cannot specify any other option or\nparameter.\n" }, { "name": "-help", "content": "Displays a help message.\n" }, { "name": "-options", "content": "Displays a list of static options. See Output Options.\n" }, { "name": "Output Options", "content": "If you do not specify a general option, then you can specify output options. Output options\ndetermine the content and format of the jstat command's output, and consist of a single\nstatOption, plus any of the other output options (-h, -t, and -J). The statOption must come\nfirst.\n\nOutput is formatted as a table, with columns that are separated by spaces. A header row with\ntitles describes the columns. Use the -h option to set the frequency at which the header is\ndisplayed. Column header names are consistent among the different options. In general, if two\noptions provide a column with the same name, then the data source for the two columns is the\nsame.\n\nUse the -t option to display a time stamp column, labeled Timestamp as the first column of\noutput. The Timestamp column contains the elapsed time, in seconds, since the target JVM\nstarted. The resolution of the time stamp is dependent on various factors and is subject to\nvariation due to delayed thread scheduling on heavily loaded systems.\n\nUse the interval and count parameters to determine how frequently and how many times,\nrespectively, the jstat command displays its output.\n\nNote: Do not to write scripts to parse the jstat command's output because the format might\nchange in future releases. If you write scripts that parse jstat command output, then expect\nto modify them for future releases of this tool.\n\n-statOption\nDetermines the statistics information the jstat command displays. The following lists the\navailable options. Use the -options general option to display the list of options for a\nparticular platform installation. See Stat Options and Output.\n\nclass: Displays statistics about the behavior of the class loader.\n\ncompiler: Displays statistics about the behavior of the Java HotSpot VM Just-in-Time\ncompiler.\n\ngc: Displays statistics about the behavior of the garbage collected heap.\n\ngccapacity: Displays statistics about the capacities of the generations and their\ncorresponding spaces.\n\ngccause: Displays a summary about garbage collection statistics (same as -gcutil), with\nthe cause of the last and current (when applicable) garbage collection events.\n\ngcnew: Displays statistics of the behavior of the new generation.\n\ngcnewcapacity: Displays statistics about the sizes of the new generations and its\ncorresponding spaces.\n\ngcold: Displays statistics about the behavior of the old generation and metaspace\nstatistics.\n\ngcoldcapacity: Displays statistics about the sizes of the old generation.\n\ngcmetacapacity: Displays statistics about the sizes of the metaspace.\n\ngcutil: Displays a summary about garbage collection statistics.\n\nprintcompilation: Displays Java HotSpot VM compilation method statistics.\n\n-h n\nDisplays a column header every n samples (output rows), where n is a positive integer.\nDefault value is 0, which displays the column header the first row of data.\n" }, { "name": "-t", "content": "Displays a timestamp column as the first column of output. The time stamp is the time\nsince the start time of the target JVM.\n", "flag": "-t" }, { "name": "-J_javaOption_", "content": "Passes javaOption to the Java application launcher. For example, -J-Xms48m sets the\nstartup memory to 48 MB. For a complete list of options, see java(1).\n" }, { "name": "Stat Options and Output", "content": "The following information summarizes the columns that the jstat command outputs for each\nstatOption.\n\n-class option\nClass loader statistics.\n\nLoaded: Number of classes loaded.\n\nBytes: Number of kBs loaded.\n\nUnloaded: Number of classes unloaded.\n\nBytes: Number of Kbytes unloaded.\n\nTime: Time spent performing class loading and unloading operations.\n\n-compiler option\nJava HotSpot VM Just-in-Time compiler statistics.\n\nCompiled: Number of compilation tasks performed.\n\nFailed: Number of compilations tasks failed.\n\nInvalid: Number of compilation tasks that were invalidated.\n\nTime: Time spent performing compilation tasks.\n\nFailedType: Compile type of the last failed compilation.\n\nFailedMethod: Class name and method of the last failed compilation.\n\n-gc option\nGarbage-collected heap statistics.\n\nS0C: Current survivor space 0 capacity (kB).\n\nS1C: Current survivor space 1 capacity (kB).\n\nS0U: Survivor space 0 utilization (kB).\n\nS1U: Survivor space 1 utilization (kB).\n\nEC: Current eden space capacity (kB).\n\nEU: Eden space utilization (kB).\n\nOC: Current old space capacity (kB).\n\nOU: Old space utilization (kB).\n\nMC: Metaspace capacity (kB).\n\nMU: Metacspace utilization (kB).\n\nCCSC: Compressed class space capacity (kB).\n\nCCSU: Compressed class space used (kB).\n\nYGC: Number of young generation garbage collection events.\n\nYGCT: Young generation garbage collection time.\n\nFGC: Number of full GC events.\n\nFGCT: Full garbage collection time.\n\nGCT: Total garbage collection time.\n\n-gccapacity option\nMemory pool generation and space capacities.\n\nNGCMN: Minimum new generation capacity (kB).\n\nNGCMX: Maximum new generation capacity (kB).\n\nNGC: Current new generation capacity (kB).\n\nS0C: Current survivor space 0 capacity (kB).\n\nS1C: Current survivor space 1 capacity (kB).\n\nEC: Current eden space capacity (kB).\n\nOGCMN: Minimum old generation capacity (kB).\n\nOGCMX: Maximum old generation capacity (kB).\n\nOGC: Current old generation capacity (kB).\n\nOC: Current old space capacity (kB).\n\nMCMN: Minimum metaspace capacity (kB).\n\nMCMX: Maximum metaspace capacity (kB).\n\nMC: Metaspace capacity (kB).\n\nCCSMN: Compressed class space minimum capacity (kB).\n\nCCSMX: Compressed class space maximum capacity (kB).\n\nCCSC: Compressed class space capacity (kB).\n\nYGC: Number of young generation GC events.\n\nFGC: Number of full GC events.\n\n-gccause option\nThis option displays the same summary of garbage collection statistics as the -gcutil\noption, but includes the causes of the last garbage collection event and (when\napplicable) the current garbage collection event. In addition to the columns listed for\n-gcutil, this option adds the following columns.\n\nLGCC: Cause of last garbage collection\n\nGCC: Cause of current garbage collection\n\n-gcnew option\nNew generation statistics.\n\nS0C: Current survivor space 0 capacity (kB).\n\nS1C: Current survivor space 1 capacity (kB).\n\nS0U: Survivor space 0 utilization (kB).\n\nS1U: Survivor space 1 utilization (kB).\n\nTT: Tenuring threshold.\n\nMTT: Maximum tenuring threshold.\n\nDSS: Desired survivor size (kB).\n\nEC: Current eden space capacity (kB).\n\nEU: Eden space utilization (kB).\n\nYGC: Number of young generation GC events.\n\nYGCT: Young generation garbage collection time.\n\n-gcnewcapacity option\nNew generation space size statistics.\n\nNGCMN: Minimum new generation capacity (kB).\n\nNGCMX: Maximum new generation capacity (kB).\n\nNGC: Current new generation capacity (kB).\n\nS0CMX: Maximum survivor space 0 capacity (kB).\n\nS0C: Current survivor space 0 capacity (kB).\n\nS1CMX: Maximum survivor space 1 capacity (kB).\n\nS1C: Current survivor space 1 capacity (kB).\n\nECMX: Maximum eden space capacity (kB).\n\nEC: Current eden space capacity (kB).\n\nYGC: Number of young generation GC events.\n\nFGC: Number of full GC events.\n\n-gcold option\nOld generation and metaspace behavior statistics.\n\nMC: Metaspace capacity (kB).\n\nMU: Metaspace utilization (kB).\n\nCCSC: Compressed class space capacity (kB).\n\nCCSU: Compressed class space used (kB).\n\nOC: Current old space capacity (kB).\n\nOU: Old space utilization (kB).\n\nYGC: Number of young generation GC events.\n\nFGC: Number of full GC events.\n\nFGCT: Full garbage collection time.\n\nGCT: Total garbage collection time.\n\n-gcoldcapacity option\nOld generation size statistics.\n\nOGCMN: Minimum old generation capacity (kB).\n\nOGCMX: Maximum old generation capacity (kB).\n\nOGC: Current old generation capacity (kB).\n\nOC: Current old space capacity (kB).\n\nYGC: Number of young generation GC events.\n\nFGC: Number of full GC events.\n\nFGCT: Full garbage collection time.\n\nGCT: Total garbage collection time.\n\n-gcmetacapacity option\nMetaspace size statistics.\n\nMCMN: Minimum metaspace capacity (kB).\n\nMCMX: Maximum metaspace capacity (kB).\n\nMC: Metaspace capacity (kB).\n\nCCSMN: Compressed class space minimum capacity (kB).\n\nCCSMX: Compressed class space maximum capacity (kB).\n\nYGC: Number of young generation GC events.\n\nFGC: Number of full GC events.\n\nFGCT: Full garbage collection time.\n\nGCT: Total garbage collection time.\n\n-gcutil option\nSummary of garbage collection statistics.\n\nS0: Survivor space 0 utilization as a percentage of the space's current capacity.\n\nS1: Survivor space 1 utilization as a percentage of the space's current capacity.\n\nE: Eden space utilization as a percentage of the space's current capacity.\n\nO: Old space utilization as a percentage of the space's current capacity.\n\nM: Metaspace utilization as a percentage of the space's current capacity.\n\nCCS: Compressed class space utilization as a percentage.\n\nYGC: Number of young generation GC events.\n\nYGCT: Young generation garbage collection time.\n\nFGC: Number of full GC events.\n\nFGCT: Full garbage collection time.\n\nGCT: Total garbage collection time.\n\n-printcompilation option\nJava HotSpot VM compiler method statistics.\n\nCompiled: Number of compilation tasks performed by the most recently compiled method.\n\nSize: Number of bytes of byte code of the most recently compiled method.\n\nType: Compilation type of the most recently compiled method.\n\nMethod: Class name and method name identifying the most recently compiled method. Class\nname uses slash (/) instead of dot (.) as a name space separator. Method name is the\nmethod within the specified class. The format for these two fields is consistent with the\nHotSpot -XX:+PrintCompilation option.\n" } ] }, "EXAMPLES": { "content": "This section presents some examples of monitoring a local JVM with an lvmid of 21891.\n", "subsections": [ { "name": "The gcutil Option", "content": "This example attaches to lvmid 21891 and takes 7 samples at 250 millisecond intervals and\ndisplays the output as specified by the -gcutil option.\n\nThe output of this example shows that a young generation collection occurred between the\nthird and fourth sample. The collection took 0.078 seconds and promoted objects from the eden\nspace (E) to the old space (O), resulting in an increase of old space utilization from 66.80%\nto 68.19%. Before the collection, the survivor space was 97.02% utilized, but after this\ncollection it is 91.03% utilized.\n\njstat -gcutil 21891 250 7\nS0 S1 E O M CCS YGC YGCT FGC FGCT GCT\n0.00 97.02 70.31 66.80 95.52 89.14 7 0.300 0 0.000 0.300\n0.00 97.02 86.23 66.80 95.52 89.14 7 0.300 0 0.000 0.300\n0.00 97.02 96.53 66.80 95.52 89.14 7 0.300 0 0.000 0.300\n91.03 0.00 1.98 68.19 95.89 91.24 8 0.378 0 0.000 0.378\n91.03 0.00 15.82 68.19 95.89 91.24 8 0.378 0 0.000 0.378\n91.03 0.00 17.80 68.19 95.89 91.24 8 0.378 0 0.000 0.378\n91.03 0.00 17.80 68.19 95.89 91.24 8 0.378 0 0.000 0.378\n" }, { "name": "Repeat the Column Header String", "content": "This example attaches to lvmid 21891 and takes samples at 250 millisecond intervals and\ndisplays the output as specified by -gcnew option. In addition, it uses the -h3 option to\noutput the column header after every 3 lines of data.\n\nIn addition to showing the repeating header string, this example shows that between the\nsecond and third samples, a young GC occurred. Its duration was 0.001 seconds. The collection\nfound enough active data that the survivor space 0 utilization (S0U) would have exceeded the\ndesired survivor Size (DSS). As a result, objects were promoted to the old generation (not\nvisible in this output), and the tenuring threshold (TT) was lowered from 31 to 2.\n\nAnother collection occurs between the fifth and sixth samples. This collection found very few\nsurvivors and returned the tenuring threshold to 31.\n\njstat -gcnew -h3 21891 250\nS0C S1C S0U S1U TT MTT DSS EC EU YGC YGCT\n64.0 64.0 0.0 31.7 31 31 32.0 512.0 178.6 249 0.203\n64.0 64.0 0.0 31.7 31 31 32.0 512.0 355.5 249 0.203\n64.0 64.0 35.4 0.0 2 31 32.0 512.0 21.9 250 0.204\nS0C S1C S0U S1U TT MTT DSS EC EU YGC YGCT\n64.0 64.0 35.4 0.0 2 31 32.0 512.0 245.9 250 0.204\n64.0 64.0 35.4 0.0 2 31 32.0 512.0 421.1 250 0.204\n64.0 64.0 0.0 19.0 31 31 32.0 512.0 84.4 251 0.204\nS0C S1C S0U S1U TT MTT DSS EC EU YGC YGCT\n64.0 64.0 0.0 19.0 31 31 32.0 512.0 306.7 251 0.204\n\n" }, { "name": "Include a Time Stamp for Each Sample", "content": "This example attaches to lvmid 21891 and takes 3 samples at 250 millisecond intervals. The -t\noption is used to generate a time stamp for each sample in the first column.\n\nThe Timestamp column reports the elapsed time in seconds since the start of the target JVM.\nIn addition, the -gcoldcapacity output shows the old generation capacity (OGC) and the old\nspace capacity (OC) increasing as the heap expands to meet allocation or promotion demands.\nThe old generation capacity (OGC) has grown from 11,696 kB to 13,820 kB after the\neighty-first full garbage collection (FGC). The maximum capacity of the generation (and\nspace) is 60,544 kB (OGCMX), so it still has room to expand.\n\nTimestamp OGCMN OGCMX OGC OC YGC FGC FGCT GCT\n150.1 1408.0 60544.0 11696.0 11696.0 194 80 2.874 3.799\n150.4 1408.0 60544.0 13820.0 13820.0 194 81 2.938 3.863\n150.7 1408.0 60544.0 13820.0 13820.0 194 81 2.938 3.863\n\n" }, { "name": "Monitor Instrumentation for a Remote JVM", "content": "This example attaches to lvmid 40496 on the system named remote.domain using the -gcutil\noption, with samples taken every second indefinitely.\n\nThe lvmid is combined with the name of the remote host to construct a vmid of\n40496@remote.domain. This vmid results in the use of the rmi protocol to communicate to the\ndefault jstatd server on the remote host. The jstatd server is located using the rmiregistry\ncommand on remote.domain that is bound to the default port of the rmiregistry command (port\n1099).\n\njstat -gcutil 40496@remote.domain 1000\n... output omitted\n\n" } ] }, "SEE ALSO": { "content": "• java(1)\n\n• jps(1)\n\n• jstatd(1)\n\n• rmiregistry(1)\n\n\n\nJDK 8 03 March 2015 jstat(1)", "subsections": [] } }, "summary": "jstat - Monitors Java Virtual Machine (JVM) statistics. This command is experimental and unsupported.", "flags": [ { "flag": "", "long": null, "arg": null, "description": "Displays a help message." }, { "flag": "", "long": null, "arg": null, "description": "Displays a list of static options. See Output Options." }, { "flag": "-t", "long": null, "arg": null, "description": "Displays a timestamp column as the first column of output. The time stamp is the time since the start time of the target JVM." }, { "flag": "", "long": null, "arg": null, "description": "Passes javaOption to the Java application launcher. For example, -J-Xms48m sets the startup memory to 48 MB. For a complete list of options, see java(1)." } ], "examples": [ "This section presents some examples of monitoring a local JVM with an lvmid of 21891.", "This example attaches to lvmid 21891 and takes 7 samples at 250 millisecond intervals and", "displays the output as specified by the -gcutil option.", "The output of this example shows that a young generation collection occurred between the", "third and fourth sample. The collection took 0.078 seconds and promoted objects from the eden", "space (E) to the old space (O), resulting in an increase of old space utilization from 66.80%", "to 68.19%. Before the collection, the survivor space was 97.02% utilized, but after this", "collection it is 91.03% utilized.", "jstat -gcutil 21891 250 7", "S0 S1 E O M CCS YGC YGCT FGC FGCT GCT", "0.00 97.02 70.31 66.80 95.52 89.14 7 0.300 0 0.000 0.300", "0.00 97.02 86.23 66.80 95.52 89.14 7 0.300 0 0.000 0.300", "0.00 97.02 96.53 66.80 95.52 89.14 7 0.300 0 0.000 0.300", "91.03 0.00 1.98 68.19 95.89 91.24 8 0.378 0 0.000 0.378", "91.03 0.00 15.82 68.19 95.89 91.24 8 0.378 0 0.000 0.378", "91.03 0.00 17.80 68.19 95.89 91.24 8 0.378 0 0.000 0.378", "91.03 0.00 17.80 68.19 95.89 91.24 8 0.378 0 0.000 0.378", "This example attaches to lvmid 21891 and takes samples at 250 millisecond intervals and", "displays the output as specified by -gcnew option. In addition, it uses the -h3 option to", "output the column header after every 3 lines of data.", "In addition to showing the repeating header string, this example shows that between the", "second and third samples, a young GC occurred. Its duration was 0.001 seconds. The collection", "found enough active data that the survivor space 0 utilization (S0U) would have exceeded the", "desired survivor Size (DSS). As a result, objects were promoted to the old generation (not", "visible in this output), and the tenuring threshold (TT) was lowered from 31 to 2.", "Another collection occurs between the fifth and sixth samples. This collection found very few", "survivors and returned the tenuring threshold to 31.", "jstat -gcnew -h3 21891 250", "S0C S1C S0U S1U TT MTT DSS EC EU YGC YGCT", "64.0 64.0 0.0 31.7 31 31 32.0 512.0 178.6 249 0.203", "64.0 64.0 0.0 31.7 31 31 32.0 512.0 355.5 249 0.203", "64.0 64.0 35.4 0.0 2 31 32.0 512.0 21.9 250 0.204", "S0C S1C S0U S1U TT MTT DSS EC EU YGC YGCT", "64.0 64.0 35.4 0.0 2 31 32.0 512.0 245.9 250 0.204", "64.0 64.0 35.4 0.0 2 31 32.0 512.0 421.1 250 0.204", "64.0 64.0 0.0 19.0 31 31 32.0 512.0 84.4 251 0.204", "S0C S1C S0U S1U TT MTT DSS EC EU YGC YGCT", "64.0 64.0 0.0 19.0 31 31 32.0 512.0 306.7 251 0.204", "This example attaches to lvmid 21891 and takes 3 samples at 250 millisecond intervals. The -t", "option is used to generate a time stamp for each sample in the first column.", "The Timestamp column reports the elapsed time in seconds since the start of the target JVM.", "In addition, the -gcoldcapacity output shows the old generation capacity (OGC) and the old", "space capacity (OC) increasing as the heap expands to meet allocation or promotion demands.", "The old generation capacity (OGC) has grown from 11,696 kB to 13,820 kB after the", "eighty-first full garbage collection (FGC). The maximum capacity of the generation (and", "space) is 60,544 kB (OGCMX), so it still has room to expand.", "Timestamp OGCMN OGCMX OGC OC YGC FGC FGCT GCT", "150.1 1408.0 60544.0 11696.0 11696.0 194 80 2.874 3.799", "150.4 1408.0 60544.0 13820.0 13820.0 194 81 2.938 3.863", "150.7 1408.0 60544.0 13820.0 13820.0 194 81 2.938 3.863", "This example attaches to lvmid 40496 on the system named remote.domain using the -gcutil", "option, with samples taken every second indefinitely.", "The lvmid is combined with the name of the remote host to construct a vmid of", "40496@remote.domain. This vmid results in the use of the rmi protocol to communicate to the", "default jstatd server on the remote host. The jstatd server is located using the rmiregistry", "command on remote.domain that is bound to the default port of the rmiregistry command (port", "1099).", "jstat -gcutil 40496@remote.domain 1000", "... output omitted" ], "see_also": [ { "name": "java", "section": "1", "url": "https://www.chedong.com/phpMan.php/man/java/1/json" }, { "name": "jps", "section": "1", "url": "https://www.chedong.com/phpMan.php/man/jps/1/json" }, { "name": "jstatd", "section": "1", "url": "https://www.chedong.com/phpMan.php/man/jstatd/1/json" }, { "name": "rmiregistry", "section": "1", "url": "https://www.chedong.com/phpMan.php/man/rmiregistry/1/json" } ] }