NetworkingĪt the Java application level, the JNIOR has support for TCP and UDP communications. The etc/ folder contains the JanosClasses.jar file. What about the etc/ folder? The etc/ folder is a read-only location that is updated by the jrupdate command when the operating system, JANOS, is updated. The stats command will show you the amount of available space in the three areas mentioned above.
The drawback here is that space is limited. The SRAM is faster than flash and battery backed so content is not lost on boot. All content is erase each time the JNIOR boots.Īll other filesystem storage in the SRAM. The drawback to this storage location is that it is temporary. The DRAM space is shared between the temp/ folder and all other system and application memory. The JNIORs are produced with 64 MB of DRAM. It also has the largest storage capacity.
The temp/ folder access is the fastest file storage location. INTEG employs a caching strategy to speed up flash access by writing to DRAM and committing to flash less often. It is slower to access than other forms of memory. The drawback to flash memory is the speed. It is the storage location for INTEG applications and the web server pages. The flash/ folder is best for long term storage. There are pros and cons to each type of memory. The flash/ folder resides in flash memory, temp/ resides in DRAM, and all other files and directories resides in SRAM. The filesystem resides in three different areas of memory. When something goes wrong it is helpful to log additional information to help you determine the cause. It can help you verify that an event happened or if something went wrong. Logging events to the filesystem is very helpful for many reasons. The build.xml file in NetBeans gives you access to Ant commands for additional compile-time functionality. INTEG uses the build.xml file in NetBeans to auto increment the version number. Versioning your application is optional but highly recommended. If you need help with a specific implementation please let us know! Versioning INTEG has numerous premade classes you can setup for your project here. There is almost always a way to get the functionality implemented with the classes we have. Those examples may use classes that aren’t available. You will notice the differences if you look for examples online and they are provided in the more recent versions of the JDK that INTEG hasn’t implemented yet.
JAVA JAR FILE VIRTUAL MEMORY CODE
Learning to code for the JNIOR and stay within the available classes is not hard. You can explore the Javadoc to explore the classes that are available. Not all classes and methods are available. INTEG has only implemented a subset of the JDK. INTEG develops Java applications using the NetBeans IDE. A JAR file that is created with any compiler will run directly on the JNIOR. The JNIOR has a JVM (Java Virtual Machine) built-in.
If there is a topic that you would like to see covered please let us know! How can Java applications be used on the JNIOR? The topics will range from very simple to more complex. This section of our site will be devoted to showing code examples for several topics.