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<title>Embedded Java</title>

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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Embedded Java</span></span>

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<p><b>Embedded Java</b> refers to versions of the <a href="Java_(programming_language)" title="Java (programming language)">Java program language</a> that are designed for <a href="Embedded_systems" class="mw-redirect" title="Embedded systems">embedded systems</a>. Since 2010 embedded Java implementations have come closer to standard Java, and are now virtually identical to the Java Standard Edition. Since Java 9 customization of the Java Runtime through modularization removes the need for specialized Java profiles targeting embedded devices.

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<div class="mw-heading mw-heading2"><h2 id="History">History</h2></div>

<p>Although in the past some differences existed between embedded Java and traditional PC based Java, the only difference now is that embedded Java code in these <a href="Embedded_systems" class="mw-redirect" title="Embedded systems">embedded systems</a> is mainly contained in constrained memory, such as <a href="Flash_memory" title="Flash memory">flash memory</a>. A complete convergence has taken place since 2010, and now Java software components running on large systems can run directly with no recompilation at all on <a href="Design-to-cost" title="Design-to-cost">design-to-cost</a> <a href="Mass-production" class="mw-redirect" title="Mass-production">mass-production</a> devices (such as consumers, industrial, <a href="White_goods" class="mw-redirect" title="White goods">white goods</a>, healthcare, metering, smart markets in general)

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<div class="mw-heading mw-heading2"><h2 id="CORE_embedded_Java_API_for_a_unified_Embedded_Java_ecosystem">CORE embedded Java API for a unified Embedded Java ecosystem</h2></div>

<p>In order for a software component to run on any Java system, it must target the core minimal API provided by the different providers of the embedded Java ecosystem. Companies share the same eight packages of pre-written programs. The packages (java.lang, java.io, java.util, ... ) form the CORE Embedded Java API, which means that embedded programmers using the Java language can use them in order to make any worthwhile use of the Java language.

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<div class="mw-heading mw-heading2"><h2 id="Old_distinctions_between_SE_embedded_API_and_ME_embedded_API_from_ORACLE">Old distinctions between SE embedded API and ME embedded API from ORACLE</h2></div>

<p>Java SE embedded is based on desktop <a href="Java_Platform%2C_Standard_Edition" title="Java Platform, Standard Edition">Java Platform, Standard Edition</a>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> It is designed to be used on systems with at least 32 MB of <a href="Random-access_memory" title="Random-access memory">RAM</a>, and can work on <a href="Linux" title="Linux">Linux</a> <a href="ARM_architecture" class="mw-redirect" title="ARM architecture">ARM</a>, <a href="X86" title="X86">x86</a>, or <a href="Power_ISA" title="Power ISA">Power ISA</a>, and <a href="Windows_XP" title="Windows XP">Windows XP</a> and <a href="Windows_XP_editions#Windows_XP_Embedded" title="Windows XP editions">Windows XP Embedded</a> architectures.

</p><p>Java ME embedded used to be based on the <a href="Connected_Device_Configuration" title="Connected Device Configuration">Connected Device Configuration</a> subset of <a href="Java_Platform%2C_Micro_Edition" title="Java Platform, Micro Edition">Java Platform, Micro Edition</a>.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> It is designed to be used on systems with at least 8 MB of <a href="Random-access_memory" title="Random-access memory">RAM</a>, and can work on <a href="Linux" title="Linux">Linux</a> <a href="ARM_architecture" class="mw-redirect" title="ARM architecture">ARM</a>, <a href="PowerPC" title="PowerPC">PowerPC</a>, or <a href="MIPS_architecture" title="MIPS architecture">MIPS architecture</a>.

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<ul><li><a href="Excelsior_JET" title="Excelsior JET">Excelsior JET</a> Embedded</li>

<li><a href="Sun_SPOT" title="Sun SPOT">Sun SPOT</a> Sun SPOT Project</li>

<li><a href="Real-Time_Specification_for_Java" class="mw-redirect" title="Real-Time Specification for Java">Real-Time Specification for Java</a></li>

<li><a href="Azul_Systems" title="Azul Systems">Azul Systems</a></li>

<li><a href="JamaicaVM" title="JamaicaVM">JamaicaVM</a></li>

<li><a href="STM32" title="STM32">STM32</a> STM32J part numbers. MCU that embeds an embedded Java engine</li></ul>

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.oracle.com/technetwork/java/embedded/overview/javase/index.html">"JAVA SE FOR EMBEDDED"</a>. <a href="Oracle_Corporation" title="Oracle Corporation">Oracle Corporation</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2011-09-04</span></span>.</cite></span>

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<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.oracle.com/technetwork/java/embedded/overview/getstarted/index.html">"JAVA ME FOR EMBEDDED"</a>. <a href="Oracle_Corporation" title="Oracle Corporation">Oracle Corporation</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2011-09-04</span></span>.</cite></span>

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<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>

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<div class="side-box-text plainlist">Wikimedia Commons has media related to <span style="font-weight: bold; font-style: italic;"><a href="https://commons.wikimedia.org/wiki/Category:Java_Embedded" class="extiw external" title="commons:Category:Java Embedded">Java Embedded</a></span>.</div></div>

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<ul><li><a rel="nofollow" class="external text" href="https://cjavapoint.blogspot.com/">Core java For interview </a>:Core java Interview Questions</li>

<li><a rel="nofollow" class="external text" href="http://www.oracle.com/technetwork/java/embedded/overview/javase/index.html">Java SE for Embedded</a> : Java SE for Embedded technology from Oracle Corporation</li>

<li><a rel="nofollow" class="external text" href="http://blogs.oracle.com/jtc/entry/java_se_embedded_development_made">Java SE for Embedded Development Made Easy</a> : Webcast covering development, troubleshooting, deployment</li></ul></div><div><div class="zim-footer">

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