Java: Get the current system environment and system properties

Last update on December 21 2024 09:55:47 (UTC/GMT +8 hours)

System Environment and Properties

Write a Java program to get the current system environment and system properties.

Pictorial Presentation:

Sample Solution:

Java Code:

import java.lang.*;

public class Exercise88 {
    public static void main(String[] args) {
        // Print a message indicating the display of the current system environment
        System.out.println("\nCurrent system environment:");

        // Retrieve and print the system environment variables using System.getenv()
        System.out.println(System.getenv());

        // Print a message indicating the display of the current system properties
        System.out.println("\n\nCurrent system properties:");

        // Retrieve and print the system properties using System.getProperties()
        System.out.println(System.getProperties());
    }
}

Sample Output:

Current system environment:                                            
{PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr
/games:/usr/local/games, LESSCLOSE=/usr/bin/lesspipe %s %s, COMP_WORDBR
EAKS=                                                                  
"'><;|&(:, JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java, TE
RM=xterm, XFILESEARCHPATH=/usr/dt/app-defaults/%L/Dt, LANG=en_US.UTF-8,
 XDG_SESSION_ID=2, MAIL=/var/mail/students, LIBVIRT_DEFAULT_URI=qemu://
/system, LOGNAME=students, PWD=/home/students/b25a3500-573c-11e7-b9f3-f
db9bc0efa62, _=/usr/bin/timeout, LESSOPEN=| /usr/bin/lesspipe %s, SHELL
=/bin/bash, SSH_TTY=/dev/pts/0, SSH_CLIENT=192.168.0.102 50450 22, OLDP
WD=/home/students, USER=students, SSH_CONNECTION=192.168.0.102 50450 19
2.168.0.200 22, NLSPATH=/usr/dt/lib/nls/msg/%L/%N.cat, XDG_RUNTIME_DIR=
/run/user/1003, LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;3
5:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=00:su=37;41:sg=30;43:
ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.
arc=01;31:*.arj=01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*
.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31
:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;31:*.lz=01;31:*.lzo
=01;31:*.xz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=
01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar
=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7
z=01;31:*.rz=01;31:*.cab=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.b
mp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.
xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35
:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;
35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=
01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=0
1;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=
01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=
01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.m4a
=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.o
gg=00;36:*.ra=00;36:*.wav=00;36:*.oga=00;36:*.opus=00;36:*.spx=00;36:*.
xspf=00;36:, SHLVL=3, HOME=/home/students}

Current system properties:                                             
{java.runtime.name=Java(TM) SE Runtime Environment, sun.boot.library.pa
th=/opt/jdk/jdk1.8.0_71/jre/lib/amd64, java.vm.version=25.71-b15, 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.country=US, sun.java.launcher=SUN_STANDARD, s
un.os.patch.level=unknown, java.vm.specification.name=Java Virtual Mach
ine Specification, user.dir=/home/students/b25a3500-573c-11e7-b9f3-fdb9
bc0efa62, java.runtime.version=1.8.0_71-b15, java.awt.graphicsenv=sun.a
wt.X11GraphicsEnvironment, java.endorsed.dirs=/opt/jdk/jdk1.8.0_71/jre/
lib/endorsed, os.arch=amd64, java.io.tmpdir=/tmp, line.separator=      
, java.vm.specification.vendor=Oracle Corporation, os.name=Linux, sun.j
nu.encoding=UTF-8, java.library.path=/usr/java/packages/lib/amd64:/usr/
lib64:/lib64:/lib:/usr/lib, java.specification.name=Java Platform API S
pecification, java.class.version=52.0, sun.management.compiler=HotSpot 
64-Bit Tiered Compilers, os.version=4.4.0-47-generic, user.home=/home/s
tudents, user.timezone=, java.awt.printerjob=sun.print.PSPrinterJob, fi
le.encoding=UTF-8, java.specification.version=1.8, java.class.path=., u
ser.name=students, java.vm.specification.version=1.8, sun.java.command=
Exercise88, java.home=/opt/jdk/jdk1.8.0_71/jre, sun.arch.data.model=64,
 user.language=en, java.specification.vendor=Oracle Corporation, awt.to
olkit=sun.awt.X11.XToolkit, java.vm.info=mixed mode, java.version=1.8.0
_71, java.ext.dirs=/opt/jdk/jdk1.8.0_71/jre/lib/ext:/usr/java/packages/
lib/ext, sun.boot.class.path=/opt/jdk/jdk1.8.0_71/jre/lib/resources.jar
:/opt/jdk/jdk1.8.0_71/jre/lib/rt.jar:/opt/jdk/jdk1.8.0_71/jre/lib/sunrs
asign.jar:/opt/jdk/jdk1.8.0_71/jre/lib/jsse.jar:/opt/jdk/jdk1.8.0_71/jr
e/lib/jce.jar:/opt/jdk/jdk1.8.0_71/jre/lib/charsets.jar:/opt/jdk/jdk1.8
.0_71/jre/lib/jfr.jar:/opt/jdk/jdk1.8.0_71/jre/classes, java.vendor=Ora
cle Corporation, file.separator=/, java.vendor.url.bug=http://bugreport
.sun.com/bugreport/, sun.io.unicode.encoding=UnicodeLittle, sun.cpu.end
ian=little, sun.cpu.isalist=}

Flowchart:

Java Code Editor:

Previous: Write a Java program than read an integer and calculate the sum of its digits and write the number of each digit of the sum in English.
Next: Write a Java program to check whether a security manager has already been established for the current application or not.