Java System getProperties() Method

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Description

The Java System getProperties() method determines the current system properties. The current set of system properties for use by the getProperty(String) method is returned as a Properties object.

If there is no current set of system properties, a set of system properties is first created and initialized. This set of system properties includes values for the following keys −

Declaration

Following is the declaration for java.lang.System.getProperties() method

public static Properties getProperties()

Parameters

NA

Return Value

This method returns the system properties.

Exception

SecurityException − if a security manager exists and its checkPermission method doesn't allow access to the process environment.

Example: Getting All Available Properties of JVM System

The following example shows the usage of Java System getProperties() method. We've retrieved a Properties object using System.getProperties() method. Then using list() method of Properties object, we're printing all properties on console.

package com.tutorialspoint;

import java.util.Properties;

public class SystemDemo {

   public static void main(String[] args) {

      // this will list the current system properties
      Properties p = System.getProperties();
      p.list(System.out);
   }
} 

Output

Let us compile and run the above program, this will produce the following result −

-- listing properties --
java.specification.version=21
sun.cpu.isalist=amd64
sun.jnu.encoding=Cp1252
java.class.path=C:\Users\Tutorialspoint\eclipse-works...
java.vm.vendor=Oracle Corporation
sun.arch.data.model=64
user.variant=
java.vendor.url=https://java.oracle.com/
java.vm.specification.version=21
os.name=Windows 11
sun.java.launcher=SUN_STANDARD
user.country=IN
sun.boot.library.path=C:\Program Files\Java\jdk-21\bin
sun.java.command=com.tutorialspoint.SystemDemo
jdk.debug=release
sun.cpu.endian=little
user.home=C:\Users\Tutorialspoint
user.language=en
java.specification.vendor=Oracle Corporation
java.version.date=2024-01-16
java.home=C:\Program Files\Java\jdk-21
file.separator=\
java.vm.compressedOopsMode=Zero based
line.separator=

java.vm.specification.vendor=Oracle Corporation
java.specification.name=Java Platform API Specification
user.script=
sun.management.compiler=HotSpot 64-Bit Tiered Compilers
java.runtime.version=21.0.2+13-LTS-58
user.name=Tutorialspoint
stdout.encoding=UTF-8
path.separator=;
os.version=10.0
java.runtime.name=Java(TM) SE Runtime Environment
file.encoding=UTF-8
java.vm.name=Java HotSpot(TM) 64-Bit Server VM
java.vendor.url.bug=https://bugreport.java.com/bugreport/
java.io.tmpdir=C:\Users\TUTORI~1\AppData\Local\Temp\
java.version=21.0.2
user.dir=C:\Users\Tutorialspoint\eclipse-works...
os.arch=amd64
java.vm.specification.name=Java Virtual Machine Specification
sun.os.patch.level=
native.encoding=Cp1252
java.library.path=C:\Program Files\Java\jdk-21\bin;C:\W...
java.vm.info=mixed mode, sharing
stderr.encoding=UTF-8
java.vendor=Oracle Corporation
java.vm.version=21.0.2+13-LTS-58
sun.io.unicode.encoding=UnicodeLittle
java.class.version=65.0