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What is the difference in properties java.runtime.version and java.version

What is reflection and why is it useful?Differences between HashMap and Hashtable?What is the difference between public, protected, package-private and private in Java?What is a serialVersionUID and why should I use it?Difference between StringBuilder and StringBufferDifference between wait() and sleep()What is the difference between JDK and JRE?What is a JavaBean exactly?What's the difference between @Component, @Repository & @Service annotations in Spring?What exactly is Apache Camel?

9

For logging purposes I'm getting the Java version written in log while Java program is running.

I found out that I can get the version with

System.getProperty("java.runtime.version") -> 1.8.0_202-b08

and

System.getProperty("java.version") -> 1.8.0_202

Result obviously is missing the "build" information in other but are there any other difference besides the result? Any certain cases when I should be using the first option rather than the second?

java system-properties

share|improve this question

edited Mar 29 at 11:21

fantaghirocco

3,82852738

asked Mar 28 at 13:36

JokkeriJokkeri

17215

• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  
  I’m not sure you can rely on java.runtime.version anymore, considering it is not documented. I would avoid it altogether.
  
  – VGR
  Mar 28 at 13:52
  

  
  
  
  

add a comment | 

9

For logging purposes I'm getting the Java version written in log while Java program is running.

I found out that I can get the version with

System.getProperty("java.runtime.version") -> 1.8.0_202-b08

and

System.getProperty("java.version") -> 1.8.0_202

Result obviously is missing the "build" information in other but are there any other difference besides the result? Any certain cases when I should be using the first option rather than the second?

java system-properties

share|improve this question

edited Mar 29 at 11:21

fantaghirocco

3,82852738

asked Mar 28 at 13:36

JokkeriJokkeri

17215

• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  
  I’m not sure you can rely on java.runtime.version anymore, considering it is not documented. I would avoid it altogether.
  
  – VGR
  Mar 28 at 13:52
  

  
  
  
  

add a comment | 

For logging purposes I'm getting the Java version written in log while Java program is running.

I found out that I can get the version with

System.getProperty("java.runtime.version") -> 1.8.0_202-b08

and

System.getProperty("java.version") -> 1.8.0_202

Result obviously is missing the "build" information in other but are there any other difference besides the result? Any certain cases when I should be using the first option rather than the second?

java system-properties

share|improve this question

edited Mar 29 at 11:21

fantaghirocco

3,82852738

asked Mar 28 at 13:36

JokkeriJokkeri

17215

System.getProperty("java.runtime.version") -> 1.8.0_202-b08

System.getProperty("java.version") -> 1.8.0_202

share|improve this question

edited Mar 29 at 11:21

fantaghirocco

3,82852738

asked Mar 28 at 13:36

JokkeriJokkeri

17215

share|improve this question

edited Mar 29 at 11:21

fantaghirocco

3,82852738

asked Mar 28 at 13:36

JokkeriJokkeri

17215

edited Mar 29 at 11:21

fantaghirocco

3,82852738

edited Mar 29 at 11:21

fantaghirocco

3,82852738

asked Mar 28 at 13:36

JokkeriJokkeri

17215

asked Mar 28 at 13:36

JokkeriJokkeri

17215

3 Answers
3

active

oldest

votes

5

System Property Name | System Property Content | Where Displayed in java version Output
---------------------|--------------------------|---------------------------------------
java.version | product version | Line one displays the product version
---------------------|--------------------------|---------------------------------------
java.runtime.version | product version | Line one displays the product version
 | product build identifier | Line two displays the build identifier

From the J2SE SDK/JRE Version String Naming Convention documentation:

• The content of the java.runtime.version system property can be expanded (beyond that of the java.version system property) to include the build id.

It seems that the property value can therefore be equal to the java.runtime content or differentiate by the build id as already pointed out in the question.

Anyway, as previously stated in a comment to the question, the java.runtime.version property doesn't appear among the currently documented system properties.

share|improve this answer

edited Mar 29 at 11:19

answered Mar 28 at 13:40

fantaghiroccofantaghirocco

3,82852738

add a comment | 

5

java.version is a product version information of Java Runtime environment(JRE). JRE is an implementation of the Java Virtual Machine which actually executes Java programs.

java.runtime.version is a product version along with build identifier of JRE.

share|improve this answer

edited Mar 28 at 14:44

answered Mar 28 at 13:44

Aniket SahrawatAniket Sahrawat

6,48421340

add a comment | 

3

One is JDK version, java.version and as the name suggest other is JRE version, R for the runtime

share|improve this answer

answered Mar 28 at 13:44

Rohail UsmanRohail Usman

447

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  I'm not 100% sure but I think this might be a false assumption... As I run the app with only JRE (no JDK) both are working. I think fantaghirocco and Aniket Sahrawat are correct with their answer and the documentation VGR linked supports this
  
  – Jokkeri
  Mar 29 at 6:10
  
  

  
  
  
  

add a comment | 

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5

System Property Name | System Property Content | Where Displayed in java version Output
---------------------|--------------------------|---------------------------------------
java.version | product version | Line one displays the product version
---------------------|--------------------------|---------------------------------------
java.runtime.version | product version | Line one displays the product version
 | product build identifier | Line two displays the build identifier

From the J2SE SDK/JRE Version String Naming Convention documentation:

• The content of the java.runtime.version system property can be expanded (beyond that of the java.version system property) to include the build id.

It seems that the property value can therefore be equal to the java.runtime content or differentiate by the build id as already pointed out in the question.

Anyway, as previously stated in a comment to the question, the java.runtime.version property doesn't appear among the currently documented system properties.

share|improve this answer

edited Mar 29 at 11:19

answered Mar 28 at 13:40

fantaghiroccofantaghirocco

3,82852738

add a comment | 

5

System Property Name | System Property Content | Where Displayed in java version Output
---------------------|--------------------------|---------------------------------------
java.version | product version | Line one displays the product version
---------------------|--------------------------|---------------------------------------
java.runtime.version | product version | Line one displays the product version
 | product build identifier | Line two displays the build identifier

From the J2SE SDK/JRE Version String Naming Convention documentation:

• The content of the java.runtime.version system property can be expanded (beyond that of the java.version system property) to include the build id.

It seems that the property value can therefore be equal to the java.runtime content or differentiate by the build id as already pointed out in the question.

Anyway, as previously stated in a comment to the question, the java.runtime.version property doesn't appear among the currently documented system properties.

share|improve this answer

edited Mar 29 at 11:19

answered Mar 28 at 13:40

fantaghiroccofantaghirocco

3,82852738

add a comment | 

System Property Name | System Property Content | Where Displayed in java version Output
---------------------|--------------------------|---------------------------------------
java.version | product version | Line one displays the product version
---------------------|--------------------------|---------------------------------------
java.runtime.version | product version | Line one displays the product version
 | product build identifier | Line two displays the build identifier

From the J2SE SDK/JRE Version String Naming Convention documentation:

• The content of the java.runtime.version system property can be expanded (beyond that of the java.version system property) to include the build id.

It seems that the property value can therefore be equal to the java.runtime content or differentiate by the build id as already pointed out in the question.

Anyway, as previously stated in a comment to the question, the java.runtime.version property doesn't appear among the currently documented system properties.

share|improve this answer

edited Mar 29 at 11:19

answered Mar 28 at 13:40

fantaghiroccofantaghirocco

3,82852738

System Property Name | System Property Content | Where Displayed in java version Output
---------------------|--------------------------|---------------------------------------
java.version | product version | Line one displays the product version
---------------------|--------------------------|---------------------------------------
java.runtime.version | product version | Line one displays the product version
 | product build identifier | Line two displays the build identifier

share|improve this answer

edited Mar 29 at 11:19

answered Mar 28 at 13:40

fantaghiroccofantaghirocco

3,82852738

answered Mar 28 at 13:40

fantaghiroccofantaghirocco

3,82852738

answered Mar 28 at 13:40

fantaghiroccofantaghirocco

3,82852738

5

java.version is a product version information of Java Runtime environment(JRE). JRE is an implementation of the Java Virtual Machine which actually executes Java programs.

java.runtime.version is a product version along with build identifier of JRE.

share|improve this answer

edited Mar 28 at 14:44

answered Mar 28 at 13:44

Aniket SahrawatAniket Sahrawat

6,48421340

add a comment | 

5

java.version is a product version information of Java Runtime environment(JRE). JRE is an implementation of the Java Virtual Machine which actually executes Java programs.

java.runtime.version is a product version along with build identifier of JRE.

share|improve this answer

edited Mar 28 at 14:44

answered Mar 28 at 13:44

Aniket SahrawatAniket Sahrawat

6,48421340

add a comment | 

java.version is a product version information of Java Runtime environment(JRE). JRE is an implementation of the Java Virtual Machine which actually executes Java programs.

java.runtime.version is a product version along with build identifier of JRE.

share|improve this answer

edited Mar 28 at 14:44

answered Mar 28 at 13:44

Aniket SahrawatAniket Sahrawat

6,48421340

share|improve this answer

edited Mar 28 at 14:44

answered Mar 28 at 13:44

Aniket SahrawatAniket Sahrawat

6,48421340

answered Mar 28 at 13:44

Aniket SahrawatAniket Sahrawat

6,48421340

answered Mar 28 at 13:44

Aniket SahrawatAniket Sahrawat

6,48421340

3

One is JDK version, java.version and as the name suggest other is JRE version, R for the runtime

share|improve this answer

answered Mar 28 at 13:44

Rohail UsmanRohail Usman

447

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  I'm not 100% sure but I think this might be a false assumption... As I run the app with only JRE (no JDK) both are working. I think fantaghirocco and Aniket Sahrawat are correct with their answer and the documentation VGR linked supports this
  
  – Jokkeri
  Mar 29 at 6:10
  
  

  
  
  
  

add a comment | 

3

One is JDK version, java.version and as the name suggest other is JRE version, R for the runtime

share|improve this answer

answered Mar 28 at 13:44

Rohail UsmanRohail Usman

447

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  I'm not 100% sure but I think this might be a false assumption... As I run the app with only JRE (no JDK) both are working. I think fantaghirocco and Aniket Sahrawat are correct with their answer and the documentation VGR linked supports this
  
  – Jokkeri
  Mar 29 at 6:10
  
  

  
  
  
  

add a comment | 

One is JDK version, java.version and as the name suggest other is JRE version, R for the runtime

share|improve this answer

answered Mar 28 at 13:44

Rohail UsmanRohail Usman

447

share|improve this answer

answered Mar 28 at 13:44

Rohail UsmanRohail Usman

447

answered Mar 28 at 13:44

Rohail UsmanRohail Usman

447

answered Mar 28 at 13:44

Rohail UsmanRohail Usman

447