Java之打印當前虛擬機的所有環境屬性的變量和值

import java.util.*;
public class SystemInfo
{
    public static void main(String[] args)
    {
        Properties  sp = System.getProperties();
        Enumeration e = sp.propertyNames();
        while(e.hasMoreElements())
        {
               String key = (String)e.nextElement();
               System.out.println(key+"="+sp.getProperty(key));
         }
    }
}

運行結果：

"C:\Program Files\Java\jdk1.8.0_144\bin\java" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2017.2.2\lib\idea_rt.jar=62428:C:\Program Files\JetBrains\IntelliJ IDEA 2017.2.2\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_144\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\rt.jar;C:\Users\lenovo\IdeaProjects\TestIntegerDemo\out\production\TestIntegerDemo" SystemInfo

java.runtime.name=Java(TM) SE Runtime Environment

sun.boot.library.path=C:\Program Files\Java\jdk1.8.0_144\jre\bin

java.vm.version=25.144-b01

java.vm.vendor=Oracle Corporation

java.vendor.url=http://java.oracle.com/

path.separator=;

java.vm.name=Java HotSpot(TM) 64-Bit Server VM

file.encoding.pkg=sun.io

user.script=

user.country=CN

sun.java.launcher=SUN_STANDARD

sun.os.patch.level=

java.vm.specification.name=Java Virtual Machine Specification

user.dir=C:\Users\lenovo\IdeaProjects\TestIntegerDemo

java.runtime.version=1.8.0_144-b01

java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment

java.endorsed.dirs=C:\Program Files\Java\jdk1.8.0_144\jre\lib\endorsed

os.arch=amd64

java.io.tmpdir=C:\Users\lenovo\AppData\Local\Temp\

line.separator=

java.vm.specification.vendor=Oracle Corporation

user.variant=

os.name=Windows 10

sun.jnu.encoding=GBK

java.library.path=C:\Program Files\Java\jdk1.8.0_144\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\Program Files\Java\jdk1.8.0_144\bin;C:\ProgramData\Oracle\Java\javapath;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;D:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;D:\Program Files\Microsoft SQL Server\100\Tools\Binn\;D:\Program Files\Microsoft SQL Server\100\DTS\Binn\;D:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\;c:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE\PrivateAssemblies\;D:\Program Files (x86)\Microsoft SQL Server\100\DTS\Binn\;C:\WINDOWS\system32\config\systemprofile\.dnx\bin;C:\Program Files\Microsoft DNX\Dnvm\;C:\Program Files\Git\cmd;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\;C:\Program Files\MySQL\MySQL Utilities 1.6\;C:\Users\lenovo\AppData\Local\Microsoft\WindowsApps;;.

java.specification.name=Java Platform API Specification

java.class.version=52.0

sun.management.compiler=HotSpot 64-Bit Tiered Compilers

os.version=10.0

user.home=C:\Users\lenovo

user.timezone=

java.awt.printerjob=sun.awt.windows.WPrinterJob

file.encoding=UTF-8

java.specification.version=1.8

user.name=lenovo

java.class.path=C:\Program Files\Java\jdk1.8.0_144\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\rt.jar;C:\Users\lenovo\IdeaProjects\TestIntegerDemo\out\production\TestIntegerDemo;C:\Program Files\JetBrains\IntelliJ IDEA 2017.2.2\lib\idea_rt.jar

java.vm.specification.version=1.8

sun.arch.data.model=64

java.home=C:\Program Files\Java\jdk1.8.0_144\jre

sun.java.command=SystemInfo

java.specification.vendor=Oracle Corporation

user.language=zh

awt.toolkit=sun.awt.windows.WToolkit

java.vm.info=mixed mode

java.version=1.8.0_144

java.ext.dirs=C:\Program Files\Java\jdk1.8.0_144\jre\lib\ext;C:\WINDOWS\Sun\Java\lib\ext

sun.boot.class.path=C:\Program Files\Java\jdk1.8.0_144\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\rt.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\sunrsasign.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_144\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_144\jre\classes

java.vendor=Oracle Corporation

file.separator=\

java.vendor.url.bug=http://bugreport.sun.com/bugreport/

sun.cpu.endian=little

sun.io.unicode.encoding=UnicodeLittle

sun.desktop=windows

sun.cpu.isalist=amd64

Process finished with exit code 0