Change Jre System Library Eclipse Mac
The JRE reads the native time zone information to determine your default time zone.
The time zone database version that ships in any JRE from Oracle is documented in the release notes. However, the actual version can be different from the version mentioned there if the JRE was patched using the tzupdater tool. To determine the current time zone data version of your JRE, either run the tzupdater tool with the Version option, or examine the header of the ZoneInfoMappings file. Change - Multiple Java installations in Mac OS X Mavericks. Multiple java versions mac (2). I downloaded JDK for Mac OS X 10.9.1 from Oracle, but I had to install another Java from Apple site once more, as I couldn't launch eclipse with it. These are two pages that I referred.
For example, on Windows, the JRE queries the registry to determine the default time zone.
However, the JRE also maintains its own time zone database. This provides cross-platform support because the different operating system APIs are not sufficient to support the Java APIs. The Java time zone database supports time zone IDs and determines daylight saving time rules for all the time zones that the JRE supports. The tzupdater tool is available for download from the Java SE Download Page.
Eclipse Jre System Library
Modifications to the JRE for each specific operating system are necessary so that the operating system can deliver the system time to the JRE. Then, if a Java application requests the system date by calling date and time related constructors, the system time is returned.
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Examples of such constructors are:
- java.util.Date()
- java.util.GregorianCalendar()
Constructors related to date and time include:
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- System.currentTimeMillis()
- System.nanoTime()
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Operating system-specific patches might be required to ensure that the correct system time is delivered to the JRE.
The following sections describe troubleshooting techniques for time zone settings.