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Java Get Runtime Version


more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed System properties are meant for that but DO keep in mind it's a privileged operation and applets/webstart/sand boxed code will not be able to execute it (getting SecurityException). It's Hat Season…Announcing Winter Bash 2016 Get the weekly newsletter! I wrote a simple utility class DumpClassVersions (available with this article's download) that can scan files, archives, and directories with Java classes and report all encountered class version stamps. http://analysedesgeeks.com/java-get/java-get-jar-version-at-runtime.html

from an applet at one of my former sites: java.specification.version 1.6 java.version 1.6.0_23 java.vm.version 19.0-b09 java.runtime.version unknown The unknown value for java.runtime.version simply means the applet is not trusted. Video EditRelated wikiHows How to Encode a String to Base64 With Java How to Add JARs to Project Build Paths in Eclipse (Java) How to Become a Java Programmer How to subliminal.message=Buy StayPuft Marshmallows! It's Hat Season…Announcing Winter Bash 2016 Get the weekly newsletter! http://stackoverflow.com/questions/2591083/getting-version-of-java-in-runtime

Java Get Version Command Line

And the error isn't exactly what you might expect either: instead of a class version mismatch, it somehow complains about a missing method. This includes your application classes and core classes like java.lang.StringBuffer. The Institute of...

private static final int MINOR_VERSION = 1; //checks if the version of the currently running JVM is bigger than //the minimum version required to run this program. //returns true if it's Suggestions? What traces are left after booting by usb? Java Get Version Programmatically Here is a list of version stamps emitted by javac compilers from various JDKs/J2SDKs by default (observe that J2SDK 1.4 is the first J2SDK where javac changes its default target from

Not the answer you're looking for? Get Java Version Linux This object contains a complete set of system property definitions. import java.io.FileInputStream; import java.util.Properties; public class PropertiesTest { public static void main(String[] args) throws Exception { // set up new properties object // from file "myProperties.txt" FileInputStream propFile = new FileInputStream( http://stackoverflow.com/questions/5103121/how-to-find-the-jvm-version-from-a-program Try Compiling and Running the Examples: FAQs.

Will it work for JVM from IBM? Get Java Version Mac I use it in my programs all the time and it works well. share|improve this answer answered Feb 24 '11 at 10:09 Finbarr 14k94380 add a comment| up vote 2 down vote Below java code returns JVM versions which are available in your current Sun Technical Articles J2SE SDK/JRE Version String Naming Convention Version 1.5.0 or 5.0? "J2SE also keeps the version number 1.5.0 (or 1.5) in some places that are visible only to developers,

Get Java Version Linux

Though in my case, all I wanted was the first two parts of the version so: Runtime.class.getPackage().getSpecificationVersion() –Wesley Hartford Dec 10 '14 at 21:44 add a comment| up vote 18 down https://docs.oracle.com/javase/tutorial/essential/environment/sysprop.html Both retrieve the value of the property named in the argument list. Java Get Version Command Line Dropbox Password security Verifying a person's age more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Java Get Version Terminal How can I make my work available to the community, when it is in conference proceedings that are not online and self archiving is not allowed?

Hold osciloscope probes How to share income after marriage and kids? this content Java Version under Windows Start Menu - Java 7 Update 40 (7u40) and later versions Starting with Java 7 Update 40, you can find the Java version through the Windows Start How does Quark attract customers to his bar given that the drinks and food can be gotten free from a replicator? Instead you want getVersion to return the double substring of version.substring(0, pos - 1). (Otherwise you're trying to create a double out of the string "1.7.0" which is not a proper Get Java Version Ubuntu

If you followed the discussion above, you now understand that this is completely redundant, and in the worst case, might interfere with the proper order of things.Scenario 2: Switch code based Since the J2SE 1.4 compiler seems like the best choice, I want to use it for all my Java programming even if my target runtime platform is an earlier version, just Holiday present-ation vs. http://analysedesgeeks.com/java-get/java-get-xmx-runtime.html Reading System Properties The System class has two methods used to read system properties: getProperty and getProperties.

This can be done from any operating system. 2 Click the "Verify Java Version" button to get started. 3 If prompted by your browser's security program, allow Java to confirm your Print Java Version Command Line J2SE 1.4 added a new method to the StringBuffer API: append(StringBuffer). Explore the IDG Network descend CIO Computerworld CSO Greenbot IDC IDG IDG Connect IDG Knowledge Hub IDG TechNetwork IDG.TV IDG Ventures Infoworld IT News ITwhitepapers ITworld JavaWorld LinuxWorld Macworld Network World

This is not a valid system property, so instead of returning null, this method returns the default value provided as a second argument: "Buy StayPuft Marshmallows!" System.getProperty("subliminal.message", "Buy StayPuft Marshmallows!"); The

The System class maintains a Properties object that describes the configuration of the current working environment. They are the major/minor version numbers of the class format (see the Class File Format Specification), and they have utility besides just being extension points for this format definition. That sounds interesting. –DavidS Jul 8 '15 at 0:26 Actually, I'd say they're not the same. Java System Properties List The other version of getProperty requires two String arguments: the first argument is the key to look up and the second argument is a default value to return if the key

Is there a way? Linked 0 Detecting future jre versions on a users machine 56 How to find the JVM version from a program? 4 Running jar created in Java 7 in a Java 6 Yes No Cookies make wikiHow better. check over here It is possible for the version of the JRE to be different than the version of the JDK.

Linked 1 Determine java version used to call a program 62 Getting version of java in runtime 4 Java: How to check jdk version? 0 How do I check a clients Oracle, the makers of Java, have provided an easy page that will check your Java installation and report the exact version you're running. http://docs.oracle.com/javase/6/docs/api/java/lang/System.html#getProperties%28%29 share|improve this answer answered Apr 20 at 12:07 Abbath 267 add a comment| up vote 0 down vote System.getProperty("sun.arch.data.model"); Java 32 Bit and 64 Bit Control Integer vers = Integer.parseInt(System.getProperty("java.version").split("\\.")[1]); more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation

There is just a tiny trick which might make your life easier: Search for the second dot and cut the string there. Changing some properties may have unexpected side-effects.