觀察運行中的java程序的運行環境參數：參數包括Java System屬性，各種.properties檔案配置參數和JVM命令行參數

			# jinfo $(pgrep java)
			Attaching to process ID 15888, please wait...
			Debugger attached successfully.
			Server compiler detected.
			JVM version is 24.72-b04
			Java System Properties:

			java.vendor = Oracle Corporation
			sun.java.launcher = SUN_STANDARD
			catalina.base = /srv/apache-tomcat
			sun.management.compiler = HotSpot 64-Bit Tiered Compilers
			catalina.useNaming = true
			captcha.times = 5
			os.name = Linux

			...
			...

			java.vm.name = Java HotSpot(TM) 64-Bit Server VM
			cpool.maxIdleTime = 7200
			file.encoding = UTF-8
			java.specification.version = 1.7

			VM Flags:

			-Djava.util.logging.config.file=/srv/apache-tomcat/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Xms512m -Xmx8192m -XX:PermSize=64M -XX:MaxPermSize=512m -Djava.endorsed.dirs=/srv/apache-tomcat/endorsed -Dcatalina.base=/srv/apache-tomcat -Dcatalina.home=/srv/apache-tomcat -Djava.io.tmpdir=/srv/apache-tomcat/temp
		

實例二

			# jinfo $(jps | grep Bootstrap | cut -d " " -f1)
			Attaching to process ID 15888, please wait...
			Debugger attached successfully.
			Server compiler detected.
			JVM version is 24.72-b04
			Java System Properties:

			java.vendor = Oracle Corporation
			sun.java.launcher = SUN_STANDARD
			catalina.base = /srv/apache-tomcat
			sun.management.compiler = HotSpot 64-Bit Tiered Compilers
			catalina.useNaming = true
			captcha.times = 5
			os.name = Linux