When we set the environment path, can't it work correctly for Java, Eclipse and Android Studio?
How to set it correctly?
When I set it temporarily by using the command prompt, set path is not working correctly.
So I tried to set it permanently by using the environment variable Path, but it's not possible.
How can I set it properly?
Please give me a detailed explanation
Apart from setting the JAVA_HOME system variable you need to set the Path variable as well because the Path is the system variable that your Operating system uses to locate the needed executable from the terminal window.
So for setting the Path Variable proceed as follows:
Right click on the My Computer icon --> Properties -->Advanced system settings --> Environment Variables
Now under System variable scroll to the Path variable
Select Path variable and click on edit button
Now add %JAVA_HOME%\bin in the end of Variable values, separating this value form the existing one in the list with a ;
eg xxxxx;%JAVA_HOME%\bin;
Note that before following the above steps also check if your JAVA_HOME variable is properly set. For doing this go to command prompt and type echo %JAVA_HOME%. If it is properly set then it will give you the path of your jdk.
NOTE: Sometimes it happens that both the Path and JAVA_HOME variables are set properly but still things are not working.To avoid this run the command prompt as administrator.
Android Studio uses JAVA_HOME variable , not Path variable. So You should set up JAVA_HOME Variable.
Right-click the My Computer icon on
your desktop and select Properties
Click the Advanced tab. Click the
Environment Variables button.
Under System Variables, click New.
Enter the variable name as JAVA_HOME.
Enter the variable value as the installation path for the Java Development Kit.
Note:Normally
installation path is like "C:\Program Files\Java\jdk1.7.0"
Related
I got a new laptop with Windows 10 and I want to set it up so I can use java and javac from the command line.
I have searched online but all the guides are for previous versions, and I don't want to mess around with something I don't understand.
Just set the path variable to JDK bin in environment variables.
Variable Name : PATH
Variable Value : C:\Program Files\Java\jdk1.8.0_31\bin
But the best practice is to set JAVA_HOME and PATH as follow.
Variable Name : JAVA_HOME
Variable Value : C:\Program Files\Java\jdk1.8.0_31
Variable Name : PATH
Variable Value : %JAVA_HOME%\bin
Here are the typical steps to set JAVA_HOME on Windows 10.
Search for Advanced System Settings in your windows Search box. Click on Advanced System Settings.
Click on Environment variables button: Environment Variables popup will open.
Goto system variables session, and click on New button to create new variable (HOME_PATH), then New System Variables popup will open.
Give Variable Name: JAVA_HOME, and Variable value : Your Java SDK home path. Ex: C:\Program Files\java\jdk1.8.0_151 Note: It should not include \bin. Then click on OK button.
Now you are able to see your JAVA_HOME in system variables list. (If you are not able to, try doing it again.)
Select Path (from system variables list) and click on Edit button, A new pop will opens (Edit Environment Variables). It was introduced in windows 10.
Click on New button and give %JAVA_HOME%\bin at highlighted field and click Ok button.
You can find complete tutorials on my blog :
How to set JAVA_HOME in 64 bit Windows 10 OS
Right click Computer
Click the properties
On the left pane select Advanced System Settings
Select Environment Variables
Under the System Variables, Select PATH and click edit,
and then click new and add path as C:\Program
Files\Java\jdk1.8.0_131\bin (depending on your installation path)
and finally click ok
Next restart your command prompt and open it and try javac
To find the env vars dialog in Windows 10:
Right Click Start
>> Click Control Panel (Or you may have System in the list)
>> Click System
>> Click Advanced system settings
>> Go to the Advanced Tab
>> Click the "Environment Variables..." button at the bottom of that dialog page.
Its still the same concept, you'll need to setup path variable so that windows is aware of the java executable and u can run it from command prompt conveniently
Details from the java's own page: https://java.com/en/download/help/path.xml
That article applies to: •Platform(s): Solaris SPARC, Solaris x86, Red Hat Linux, SUSE Linux, Windows 8, Windows 7, Vista, Windows XP, Windows 10
if you have any version problems (javac -version=15.0.1, java -version=1.8.0)
windows search : edit environment variables for your account
then delete these in your windows Environment variable: system variable: Path
C:\Program Files (x86)\Common Files\Oracle\Java\javapath
C:\Program Files\Common Files\Oracle\Java\javapath
then if you're using java 15
environment variable: system variable : Path
add path C:\Program Files\Java\jdk-15.0.1\bin
is enough
if you're using java 8
create JAVA_HOME
environment variable: system variable : JAVA_HOME
JAVA_HOME = C:\Program Files\Java\jdk1.8.0_271
environment variable: system variable : Path
add path = %JAVA_HOME%\bin
Adding Environment Variable simplified with screenshot.
Check the below URL and you should be able to do without any trouble.
https://itsforlavanya.blogspot.com/2020/08/environment-variable-simple-7-steps-to.html
I want to rely on JAVA_HOME environment variable to install the Elasticsearch instead want to hardcode the path of java for elasticsearch.I tried hard coding the path in service.bat but it didn't work.Then i looked in some more files in the bin folder of ES elasticsearch.bat and elasticsearch.sh and figured out the the changes to only service.bat wont suffice. Just want to make sure where i need to make the changes as i have very limited knowledge of java.
Thanks
STEP 1
Can you verify that Environment variable JAVA_HOME is set to your JDK,
C:\>echo %JAVA_HOME%
Or, verify java command is available,
java -version
STEP 2
If JAVA_HOME is not set, please follow the steps provided here - How to Set JAVA_HOME in windows
Summary ,
Right-click the My Computer icon on your desktop and select
Properties.
Click the Advanced tab. Click the Environment Variables button.
Under System Variables, click New.
Enter the variable name as JAVA_HOME.
Enter the variable value as the installation path for the JDK.
(eg. C:\Progra~1\Java\jdk1.8.0_20).
Click OK.
Click Apply Changes.
STEP 3
Verify STEP 1 again.
STEP 4
start elasticsearch
I've definitely got JDK 1.6.0 installed in C:\Program Files\Java\jdk1.6.0_35, but it never seems to be able to find it when I try to open the SDK Manager. In task manager, find_java.exe shows up until I stop it (will run for hours).
Are there some environment variables I have to set for this to work?
As you are using Windows system, use following way to set your JAVA_HOME and CLASSPATH Environment variables.
Windows XP
Select Start, select Control Panel. double click System, and select the Advanced tab.
Click Environment Variables. In the section System Variables, find the PATH environment variable and select it. Click Edit. If the PATH environment variable does not exist, click New.
In the Edit System Variable (or New System Variable) window, specify the value of the PATH environment variable. Click OK. Close all remaining windows by clicking OK.
Windows Vista:
From the desktop, right click the My Computer icon.
Choose Properties from the context menu.
Click the Advanced tab (Advanced system settings link in Vista).
Click Environment Variables. In the section System Variables, find the PATH environment variable and select it. Click Edit. If the PATH environment variable does not exist, click New.
In the Edit System Variable (or New System Variable) window, specify the value of the PATH environment variable. Click OK. Close all remaining windows by clicking OK.
Windows 7:
From the desktop, right click the Computer icon.
Choose Properties from the context menu.
Click the Advanced system settings link.
Click Environment Variables. In the section System Variables, find the PATH environment variable and select it. Click Edit. If the PATH environment variable does not exist, click New.
In the Edit System Variable (or New System Variable) window, specify the value of the PATH environment variable. Click OK. Close all remaining windows by clicking OK.
Now in Addition for the Linux Based System following steps used to set JAVA_HOME and CLASSPATH variables,
Open root folder
From the View Menu , ticK "Show Hidden Files" , or press Ctrl + H.
Now you can see a system hidden file called .bashrc
Right click and open it editor, and write following command at the end.
PATH=$PATH:/opt/jdk1.6.0_21/bin
export PATH
JAVA_HOME=/opt/jdk1.6.0_21
export JAVA_HOME
NDK_HOME=/opt/android-ndk-r8
export NDK_HOME
Save and Exit.
May be you are forgetting the PATH environmental variable. To check this use,
In Unix/Linux systems,
echo $PATH
echo $JAVA_HOME
In Windows systems,
echo %PATH%
echo %JAVA_HOME%
If both the tests showed you empty lines, then you may need to set them again.
To set them do this. First try reinstalling java with UAC turned off.
If it failed, do this at the cmd
SetX PATH %PATH%;<path_to_jdk/jre>\bin\
SetX JAVA_HOME <path_to_jdk/jre>
Hope it helps and thinking you are using windows.
I have a book that says to do the following.
Add a JAVA_HOME and ANT_HOME environment variable. - check
Add $JAVA_HOME/bin and $ANT_HOME/bin to my path variable - check
When I then go to the command prompt and try ant -version it says ant is not a recognized command. If I then take the value I plugged into the ANT_HOME variable and use it in place of $ANT_HOME it all works. Is this the way it's supposed to work in windows? I'm not sure so I just figured that whatever was put in ANT_HOME was then parsed in the path variable when used as $ANT_HOME. Thanks.
you can try the following:
SET ANT_HOME=my_path_to_ant_folder
SET JAVA_HOME=my_path_to_jdk_folder
SET PATH=%PATH%;%ANT_HOME%/bin;%JAVA_HOME%\bin;
right click My Computer
click Properties
go to Advanced system settings
click on Advanced tab
click on Environment Variables
click on New...
Now you can define an environment variable, type JAVA_HOME in Variable name and in Variable value the path to you JAVA_HOME, the same thing goes for ANT_HOME.
$ANT_HOME doesn't mean $ANT_HOME, literally. $ANT_HOME means "the value of ANT_HOME".
If Ant is installed at c:\ant, your environment variables should be:
ANT_HOME=c:\ant
PATH = ...;c:\ant\bin;...
Same for JAVA_HOME.
Right click on My computer and select properties.
Click on Advance system settings.
Visit http://codebrizz.blogspot.com.ng/2016/07/installation-and-configuration.html for full configuration guide with images for each step
I have installed java on windows-64bit OS. but when I execute javac, it is failing with the
error message no such command is available". I have created following environmental variable
CLASSPATH C:\Program Files (x86)\Java\jdk1.6.0_05\lib
Add the appropriate javac path to your PATH variable. java.exe will be found under the bin directory of your JDK. E.g.
SET PATH=%PATH%;C:\Program Files (x86)\Java\jdk1.6.0_05\bin
Before answering your question, just wann ans this simple question : Why we need PATH and CLASSPATH?
Answer:
1) PATH: You need to set PATH to compile Java source code, create JAVA CLASS FILES and Operating System to load classes at runtime.
2) CLASSPATH: This is used by JVM and not by OS.
Answer to your question :
Just make sure you have Modified PATH variable (Windows System Environmental Variable) so that it points to bin dir which contains all exe for example: java,javac and etc. In my case it is like this : ;C:\Program Files\Java\jre7\bin.
So, it doesn't matter your system is 32 bit/64 bit until and unless you specify/Modify the PATH variable correctly.
Actually, the most conventional way of getting it done on Windows is
Go to Control Panel
Click System
Open Advanced settings
Click Environment Variables...
Path is one of the variables under "System Variables".
This is where the system will search when you try to execute a command.
just append the full path to the Bin folder under your Java
installation path. You can copy it using Windows Explorer to avoid typing it manually
click OK to close the dialogs.
To verify, open the command window aka console window (for example, WindowsKey-R cmd.exe ) and run:
javac -version
If the java bin folder is in the path, the system will find and execute the javac.exe file located there, and you will see your Java version. Something like:
c:\>javac -version
javac 1.7.0_65
Very Simple:
You need to set the two environment variables only; PATH and java
=>Right Click on My computer
=>Properties
=>Click on left hand side bar menu "Advanced system settings"
=> Click on "Environment Variables" button refer below fig.
=>Follow the below steps to Set User variable and System variable.
To Set User variable named as "PATH"
Click on "New" button in user variables section.
Set the variable name as "PATH" and variable value as per your java
installed version.(Shown in below fig.)
To Set System variable named as "java"
Click on "New" button in System variable tab.
Set the variable name as "java" and variable value as per your java
installed version.(Shown in below fig.)
Refer below images for the reference.
For me, the 'JAVA_HOME' variable should be set as a System Variable, instead of User Variable.
When the 'JAVA_HOME' was changed to be a System Variable, the command 'javac' works.
Also, the PATH and CLASSPATH are System Variable.