JAVA EE: Java Tutorial: Properties class in java [How to get all the system properties]

Tuesday, 28 February 2017

Java Tutorial: Properties class in java [How to get all the system properties]

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Java Tutorial: Properties class in java [How to get all the system properties]

PropertiesDemo.java

import java.io.IOException;
import java.util.Iterator;
import java.util.Properties;
import java.util.Set;

class PropertiesDemo
{

    public static void main(String[] args) throws IOException
    {

        /*
         * Returns the system properties
         */
        Properties p = System.getProperties();

        /*
         * Returns a set of keys in this property list where
         * the key and its corresponding value are strings,
         * including distinct keys in the default property
         * list if a key of the same name has not already
         * been found from the main properties list.
         */
        Set<String> set = p.stringPropertyNames();

        Iterator<String> itr = set.iterator();

        while (itr.hasNext())
        {
            String key = (String) itr.next();
            /*
             * Gets the system property indicated by the
             * specified key.
             */
            String value = p.getProperty(key);
            System.out.println(key + " = " + value);
        }

    }
}

Output

java.runtime.name = Java(TM) SE Runtime Environment
sun.boot.library.path = C:\Java\jre1.8.0_111\bin
java.vm.version = 25.111-b14
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 = US
sun.java.launcher = SUN_STANDARD
sun.os.patch.level = Service Pack 1
java.vm.specification.name = Java Virtual Machine Specification
user.dir = D:\eclipse\workspace\PropertiesDemo
java.runtime.version = 1.8.0_111-b14
java.awt.graphicsenv = sun.awt.Win32GraphicsEnvironment
java.endorsed.dirs = C:\Java\jre1.8.0_111\lib\endorsed
os.arch = amd64
java.io.tmpdir = C:\Users\Ramesh\AppData\Local\Temp\
line.separator = 

java.vm.specification.vendor = Oracle Corporation
user.variant = 
os.name = Windows 7
sun.jnu.encoding = Cp1252
java.library.path = C:\Java\jre1.8.0_111\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Java/jre1.8.0_111/bin/server;C:/Java/jre1.8.0_111/bin;C:/Java/jre1.8.0_111/lib/amd64;C:\ProgramData\Oracle\Java\javapath;C:\Program Files (x86)\AMD APP\bin\x86_64;C:\Program Files (x86)\AMD APP\bin\x86;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Program Files\Lenovo\Bluetooth Software\;C:\Program Files\Lenovo\Bluetooth Software\syswow64;C:\Program Files\OpenVPN\bin;C:\Java\jdk1.8.0_111\bin;C:\Program Files\TortoiseGit\bin;C:\Program Files\Git\cmd;C:\Program Files\TortoiseHg\;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;D:\eclipse;;.
java.specification.name = Java Platform API Specification
java.class.version = 52.0
sun.management.compiler = HotSpot 64-Bit Tiered Compilers
os.version = 6.1
user.home = C:\Users\Ramesh
user.timezone = 
java.awt.printerjob = sun.awt.windows.WPrinterJob
file.encoding = Cp1252
java.specification.version = 1.8
user.name = Ramesh
java.class.path = D:\eclipse\workspace\PropertiesDemo\bin
java.vm.specification.version = 1.8
sun.arch.data.model = 64
java.home = C:\Java\jre1.8.0_111
sun.java.command = PropertiesDemo
java.specification.vendor = Oracle Corporation
user.language = en
awt.toolkit = sun.awt.windows.WToolkit
java.vm.info = mixed mode
java.version = 1.8.0_111
java.ext.dirs = C:\Java\jre1.8.0_111\lib\ext;C:\Windows\Sun\Java\lib\ext
sun.boot.class.path = C:\Java\jre1.8.0_111\lib\resources.jar;C:\Java\jre1.8.0_111\lib\rt.jar;C:\Java\jre1.8.0_111\lib\sunrsasign.jar;C:\Java\jre1.8.0_111\lib\jsse.jar;C:\Java\jre1.8.0_111\lib\jce.jar;C:\Java\jre1.8.0_111\lib\charsets.jar;C:\Java\jre1.8.0_111\lib\jfr.jar;C:\Java\jre1.8.0_111\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