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| <span id="module:FindJava"></span><h1>FindJava<a class="headerlink" href="#findjava" title="Permalink to this headline">ΒΆ</a></h1> |
| <p>Find Java</p> |
| <p>This module finds if Java is installed and determines where the |
| include files and libraries are. The caller may set variable <code class="docutils literal notranslate"><span class="pre">JAVA_HOME</span></code> |
| to specify a Java installation prefix explicitly.</p> |
| <p>See also the <span class="target" id="index-0-module:FindJNI"></span><a class="reference internal" href="FindJNI.html#module:FindJNI" title="FindJNI"><code class="xref cmake cmake-module docutils literal notranslate"><span class="pre">FindJNI</span></code></a> module to find Java Native Interface (JNI).</p> |
| <div class="versionadded"> |
| <p><span class="versionmodified added">New in version 3.10: </span>Added support for Java 9+ version parsing.</p> |
| </div> |
| <p>Specify one or more of the following components as you call this find module. See example below.</p> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Runtime = Java Runtime Environment used to execute Java byte-compiled applications |
| Development = Development tools (java, javac, javah, jar and javadoc), includes Runtime component |
| IdlJ = Interface Description Language (IDL) to Java compiler |
| JarSigner = Signer and verifier tool for Java Archive (JAR) files |
| </pre></div> |
| </div> |
| <p>This module sets the following result variables:</p> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Java_JAVA_EXECUTABLE = the full path to the Java runtime |
| Java_JAVAC_EXECUTABLE = the full path to the Java compiler |
| Java_JAVAH_EXECUTABLE = the full path to the Java header generator |
| Java_JAVADOC_EXECUTABLE = the full path to the Java documentation generator |
| Java_IDLJ_EXECUTABLE = the full path to the Java idl compiler |
| Java_JAR_EXECUTABLE = the full path to the Java archiver |
| Java_JARSIGNER_EXECUTABLE = the full path to the Java jar signer |
| Java_VERSION_STRING = Version of java found, eg. 1.6.0_12 |
| Java_VERSION_MAJOR = The major version of the package found. |
| Java_VERSION_MINOR = The minor version of the package found. |
| Java_VERSION_PATCH = The patch version of the package found. |
| Java_VERSION_TWEAK = The tweak version of the package found (after '_') |
| Java_VERSION = This is set to: $major[.$minor[.$patch[.$tweak]]] |
| </pre></div> |
| </div> |
| <div class="versionadded"> |
| <p><span class="versionmodified added">New in version 3.4: </span>Added the <code class="docutils literal notranslate"><span class="pre">Java_IDLJ_EXECUTABLE</span></code> and <code class="docutils literal notranslate"><span class="pre">Java_JARSIGNER_EXECUTABLE</span></code> |
| variables.</p> |
| </div> |
| <p>The minimum required version of Java can be specified using the |
| <span class="target" id="index-0-command:find_package"></span><a class="reference internal" href="../command/find_package.html#command:find_package" title="find_package"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">find_package()</span></code></a> syntax, e.g.</p> |
| <div class="highlight-cmake notranslate"><div class="highlight"><pre><span></span><span class="nf">find_package(</span><span class="nb">Java</span><span class="w"> </span><span class="m">1.8</span><span class="nf">)</span><span class="w"></span> |
| </pre></div> |
| </div> |
| <p>NOTE: <code class="docutils literal notranslate"><span class="pre">${Java_VERSION}</span></code> and <code class="docutils literal notranslate"><span class="pre">${Java_VERSION_STRING}</span></code> are not guaranteed to |
| be identical. For example some java version may return: |
| <code class="docutils literal notranslate"><span class="pre">Java_VERSION_STRING</span> <span class="pre">=</span> <span class="pre">1.8.0_17</span></code> and <code class="docutils literal notranslate"><span class="pre">Java_VERSION</span> <span class="pre">=</span> <span class="pre">1.8.0.17</span></code></p> |
| <p>another example is the Java OEM, with: <code class="docutils literal notranslate"><span class="pre">Java_VERSION_STRING</span> <span class="pre">=</span> <span class="pre">1.8.0-oem</span></code> |
| and <code class="docutils literal notranslate"><span class="pre">Java_VERSION</span> <span class="pre">=</span> <span class="pre">1.8.0</span></code></p> |
| <p>For these components the following variables are set:</p> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Java_FOUND - TRUE if all components are found. |
| Java_<component>_FOUND - TRUE if <component> is found. |
| </pre></div> |
| </div> |
| <p>Example Usages:</p> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>find_package(Java) |
| find_package(Java 1.8 REQUIRED) |
| find_package(Java COMPONENTS Runtime) |
| find_package(Java COMPONENTS Development) |
| </pre></div> |
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