What version of Java is running in Eclipse

Question

How do I know what version of Java is being run in Eclipse   Is there a way to write code to find out   Is  JRE System Library  JavaSE-1 6   in  Package Explorer  the right version

User · Answer

There are various options are available to test which java version is using your eclipse. The best way is to find first java installed in your machine.

run java -version command on terminal

then to check whether your eclipse pointing to the right version or not.

For that go to

Eclipse >> Preferences >>Java >>Installed JREs

User · Answer

Under the help menu  there should be a menu item labeled  About Eclipse  I can t say with absolute precision because I m using STS which is the same thing but my label is different   In the dialog box that opens after you click the relevant about menu item there should be an installation details button in the lower left hand corner   The version of Java that you re running Eclipse against ought to be in  System properties   under the  Configuration  tab

User · Answer

Eclipse uses the default Java on the system to run itself  This can also be changed in the eclipse ini file in your eclipse install folder   To find out the version of java that your eclipse project is using  see Project- properties- build path- Libraries tab and see the JRE system library thats being used  You can also check it out at Window- Preferences- Java- Installed JREs  This is a list of all JREs that eclipse knows about  To find out using code   use the System getProperty      method  See http   java sun com j2se 1 5 0 docs api java lang System html getProperties   for supported properties

User · Answer

The one the eclipse run in is the default java installed in the system  unless set specifically in the eclipse ini file  use the -vm option   You can of course add more Java runtimes and use them for your projects  The string you ve written is the right one  but it is specific to your environment  If you want to know the exact update then run the following code   public class JavaVersion     public static void main String   args        System out println System getProperty  java runtime version

User · Answer

If you want to check if your -vm eclipse ini option worked correctly you can use this to see under what JVM the IDE itself runs  menu Help   About Eclipse   Installation Details   Configuration tab  Locate the line that says  java runtime version

User · Answer

try this    public class vm     public static void main String   args            System getProperty  sun arch data model            compile and run  it will return either 32 or 64 as per your java version

User · Answer

Don t about the code but you can figure it out like this way     Go into the  window  tab then preferences- java- Installed JREs  You can add your own JRE 1 7 or 1 5 etc  also   For changing the compliance level  window- preferences- java- compiler  C Change the compliance level

User · Answer

String runtimeVersion   System getProperty  java runtime version      should return you a string along the lines of   1 5 0 01-b08   That s the version of Java that Eclipse is using to run your code which is not necessarily the same version that s being used to run Eclipse itself

[java] What version of Java is running in Eclipse?

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