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 −
Key Description of Associated Value java.version Java Runtime Environment version java.vendor Java Runtime Environment vendor java.vendor.url Java vendor URL java.home Java installation directory java.vm.specification.version Java Virtual Machine specification version java.vm.specification.vendor Java Virtual Machine specification vendor java.vm.specification.name Java Virtual Machine specification name java.vm.version Java Virtual Machine implementation version java.vm.vendor Java Virtual Machine implementation vendor java.vm.name Java Virtual Machine implementation name java.specification.version Java Runtime Environment specification version java.specification.vendor Java Runtime Environment specification vendor java.specification.name Java Runtime Environment specification name java.class.version Java class format version number java.class.path Java class path java.library.path List of paths to search when loading libraries java.io.tmpdir Default temp file path java.compiler Name of JIT compiler to use java.ext.dirs Path of extension directory or directories os.name Operating system name os.arch Operating system architecture os.version Operating system version file.separator File separator ("/" on UNIX) path.separator Path separator (":" on UNIX) line.separator Line separator ("\n" on UNIX) user.name User's account name user.home User's home directory user.dir User's current working directory DeclarationFollowing is the declaration for java.lang.System.getProperties() method
public static Properties getProperties()Parameters
NA
Return ValueThis method returns the system properties.
ExceptionSecurityException − if a security manager exists and its checkPermission method doesn't allow access to the process environment.
Example: Getting All Available Properties of JVM SystemThe 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
java_lang_system.htm
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