Environment variables for java installation

Question

How to set the environment variables for Java in Windows  the classpath

User · Answer

In programming context you can execute SET command (SET classpath=c:\java) or Right click on your computer > properties > advanced > environment variables.

In a batch file you can use

SET classpath=c:\java
java c:\myapplication.class

User · Answer

For Windows    Right click on  My Computers  and open  Properties   In Windows Vista or Windows 7  go to  Advanced System Settings   Else go to next step  Go to  Advanced Tab  and click on Environment Variables button  Select  Path  under the list of  System Variables   and press Edit and add C  Program Files java jdk bin after a semicolon   Now click on  new  button under system variables and enter  JAVA HOME  as variable name and path to jdk home directory   ex   C  Program Files Java jdk1 6 0 24  if you are installing java version 6  Directory name may change with diff  java versions  as variable value

User · Answer

Under Linux  http   lowfatlinux com linux-environment-variables html  And of course  you can retrieve them from Java using   String variable   System getProperty  mykey

User · Answer

Download the JDK Install it Then Setup environment variables like this   Click on EDIT      Then click PATH  Click Add   Then Add it like this

User · Answer

Keep in mind that the  CLASSPATH  environment variable is ignored when you use java javac in combination with one of the -cp  -classpath or -jar arguments  It is also ignored in an IDE like Netbeans Eclipse IntelliJ etc  It is only been used when you use java javac without any of the above mentioned arguments   In case of JAR files  the classpath is to be defined as class-path entry in the manifest mf file  It can be defined semicolon separated and relative to the JAR file s root   In case of an IDE  you have the so-called  build path  which is basically the classpath which is used at both compiletime and runtime  To add external libraries you usually drop the JAR file in a  either precreated by IDE or custom created  lib folder of the project which is added to the project s build path

User · Answer

Set java Environment variable in Centos   Linux   home  vi  bashrc   export JAVA HOME  opt oracle product java jdk1 8 0 45  export PATH  JAVA HOME bin  PATH  java -version

User · Answer

--- To set java path ---  There are two ways to set java path  A  Temporary   Open cmd Write in cmd   javac   If java is not installed  then you will see message      javac is not recognized as internal or external command  operable program or batch file     Write in cmd   set path C  Program Files Java jdk1 8 0 121 bin Write in cmd   javac    You can check that path is set if not error has been raised   It is important to note that these changes are only temporary from programs launched from this cmd   NOTE  You might have to run the command line as admin  B  Permanent   Righ-click on  My computer  and click on properties Click on  Advanced system settings  Click on  Environment variables  Click on new tab of user variable Write path in variable name Copy the path of bin folder Paste the path of the bin folder in the variable value Click OK   The path is now set permanently   TIP  The tool  Rapid Environment Editor   freeware  is great for modifying the environment variables and useful in that case  TIP2  There is also a faster way to access the Environment Variables  press Win R keys  paste the following  windir  System32 rundll32 exe sysdm cpl EditEnvironmentVariables and press ENTER

User · Answer

For Windows 7 users   Right-click on My Computer  select Properties  Advanced  System Settings  Advanced  Environment Variables  Then find PATH in the second box and set the variable like in the picture below

User · Answer

The JDK installation instructions explain exactly how to set the PATH  for different versions of Windows   Normally you should not set the CLASSPATH environment variable  If you leave it unset  Java will look in the current directory to find classes  You can use the -cp or -classpath command line switch with java or javac

User · Answer

Java SE Development Kit 8u112 on a 64-bit Windows 7 or Windows 8  Set the following user environment variables     environment variables of type user variables    JAVA HOME   C  Program Files Java jdk1 8 0 112 JDK HOME     JAVA HOME  JRE HOME     JAVA HOME  jre CLASSPATH      JAVA HOME  lib  JAVA HOME  jre lib PATH        your-unique-entries  JAVA HOME  bin  make sure that the longish your-unique-entries does not contain any other references to another Java installation folder       Note for Windows users on 64-bit systems    Progra 1    Program Files  Progra 2    Program Files x86     Notice that these environment variables are derived from the  root  environment variable JAVA HOME  This makes it easy to update your environment variables when updating the JDK  Just point JAVA HOME to the fresh installation   There is a blogpost explaining the rationale behind all these environment variables   Optional recommendations   Add an user environment variable JAVA TOOL OPTIONS with value -Dfile encoding  UTF-8   This ensures that Java  and tools such as Maven  will run with a Charset defaultCharset   of UTF-8  instead of the default Windows-1252   This has saved a lot of headaches when wirking with my own code and that of others  which unfortunately often assume the  sane  default encoding UTF-8  When JDK is installed  it adds to the system environment variable Path an entry C  ProgramData Oracle Java javapath   I anecdotally noticed that the links in that directory didn t get updated during an JDK installation update  So it s best to remove C  ProgramData Oracle Java javapath  from the Path system environment variable in order to have a consistent environment

User · Answer

For deployment better to set up classpath exactly and keep environment clear  Or at   bat  the same for linux  but with correct variables symbols    CLASSPATH  c  lib d  temp test jar  lt long classpath gt   CLASSPATH  CLASSPATH    lt another logical droup of classpath   java -cp  CLASSPATH  com test MainCLass   Or at command line or   bat  for   sh too  if classpath id not very long   java -cp  c  lib d  temp test jar  lt short classpath gt

User · Answer

In Windows 7  right-click on Computer -  Properties -  Advanced system settings  then in the Advanced tab  click Environment Variables    -  System variables -  New      Give the new system variable the name JAVA HOME and the value C  Program Files Java jdk1 7 0 79  depending on your JDK installation path it varies    Then select the Path system variable and click Edit     Keep the variable name as Path  and append C  Program Files Java jdk1 7 0 79 bin  or  JAVA HOME  bin   both mean the same  to the variable value   Once you are done with above changes  try below steps  If you don t see similar results  restart the computer and try again  If it still doesn t work you may need to reinstall JDK   Open a Windows command prompt  Windows key   R -  enter cmd -  OK   and check the following   java -version   You will see something like this   java version  1 7 0 79  Java TM  SE Runtime Environment  build 1 7 0 79-b15  Java HotSpot TM  64-Bit Server VM  build 24 79-b02  mixed mode    Then check the following   javac -version   You will see something like this   javac 1 7 0 79

User · Answer

I am going to explain here by pictures for Windows 7   Please follow the following steps   Step 1  Go to  Start  and get into the  My Computer   properties    Step 2  Go to  Advance System Setting  and click on it      Step 3  Go to  Start  and get into the  My Computer   properties    Step 4  The dialog for Environment variable will open like this     Step 5  Go to path and click on edit     Step 6  Put the path of your JDK wherever it resides up to bin like you can see in the picture  Also add path from your sdk of Android up to the Platform Tools

User · Answer

In Windows inorder to set    Step 1    Right Click on MyComputer and click on properties    Step 2   Click on Advanced tab                Step 3  Click on Environment Variables     Step 4  Create a new  class path for  JAVA HOME     Step 5  Enter the Variable name as JAVA HOME and the value to your jdk bin path ie c  Programfiles Java jdk-1 6 bin and    NOTE Make sure u start with    in the Value so that it doesn t corrupt the other environment variables which is already set     Step 6   Follow the Above step and edit the  Path in System Variables add the following  c  Programfiles Java jdk-1 6 bin in the value column   Step 7  Your are done setting up your environment variables for your Java   In order to test it go to command prompt and type    java      who will get a list of help doc   In order make sure whether compiler is setup Type in cmd    javac   who will get a list related to javac   Hope this Helps

[java] Environment variables for java installation

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