Prepare an Embedded Device to Use the Java SE Client Software Library

An embedded device running Linux must be configured correctly and meet the minimum hardware requirements to successfully install the Java SE client software library.

1. Make sure the hardware prerequisites are met before you install the Java SE client software library on your device. For a list of supported platforms, see Oracle IoT Cloud Service Client Software Certified System Configurations.
2. Open a web browser and browse to Oracle Java SE Embedded Downloads page.
3. Download Oracle Java SE Embedded JDK to your device. These are the available versions:

   Platform	Hardware	File
   Linux/x86 desktop	x86 Linux Small Footprint – Headless	ejdk-<version>–linux-i586.tar.gz
   ARM v6/v7 Linux — Hard Floating Point	ARM v6/v7 Linux - VFP, HardFP ABI, Little Endian 1	ejdk-<version>-linux-armv6-vfp-hflt.tar.gz
   ARM v5/v6/v7 Linux — Soft Floating Point	ARMv5/ARMv6/ARMv7 Linux - SoftFP ABI, Little Endian 2.	ejdk-<version>-linux-arm-sflt.tar.gz

4. Run this command to extract the contents of the Oracle Java SE Embedded JDK file. using the example 8u101 version:

   cd <eJDK-download-folder-location>/
   tar xzvf ejdk-8u101-linux-armv6-vfp-hflt.tar.gz

5. Verify that the ejdk1.8.0_101 folder was created.
6. Run this command to create the Java SE Embedded Compact 2 profile:

   cd ejdk1.8.0_73/bin
   ./jrecreate.sh -d /home/<user>/ejre1.8.0_73_compact2_minimal_vm -p compact2 --vm minimal

   The output should appear similar to this example:

   Building JRE using Options {
   ejdk-home: /home/janeuser/ejdk1.8.0_101
   		dest: /home/janeuser/ejre1.8.0_101_compact2_minimal_vm
   		target: linux_arm_vfp_hflt
   		vm: minimalruntime: compact2 profile
   		debug: false
   		keep-debug-info: false
   		no-compression: false
   		dry-run: false
   		verbose: false
   			extension: []}

7. Install the JDK Compact 2 profile on your device. See Create Your JRE with jrecreate in the Oracle Java SE Embedded Developer’s Guide.