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diff --git a/files/es/archive/web/liveconnect/javaobject/index.html b/files/es/archive/web/liveconnect/javaobject/index.html new file mode 100644 index 0000000000..7248cef567 --- /dev/null +++ b/files/es/archive/web/liveconnect/javaobject/index.html @@ -0,0 +1,61 @@ +--- +title: JavaObject +slug: Archive/Web/LiveConnect/JavaObject +translation_of: Archive/Web/LiveConnect_Reference/JavaObject +--- +<p> +</p> +<h3 id="Summary" name="Summary"> Summary </h3> +<p><b>Core Object</b> +</p><p>The type of a wrapped Java object accessed from within JavaScript code. +</p> +<h3 id="Created_by" name="Created_by"> Created by </h3> +<p>Any Java method which returns an object type. In addition, you can explicitly construct a <code>JavaObject</code> using the object's Java constructor with the <code>Packages</code> keyword: +</p> +<pre class="eval">new Packages.<i>JavaClass</i>(<i>parameterList</i>) +</pre> +<p><i>JavaClass</i> is the fully-specified name of the object's Java class. +</p> +<h3 id="Parameters" name="Parameters"> Parameters </h3> +<dl><dt> <code>parameterList</code> </dt><dd> An optional list of parameters, specified by the constructor of the Java class. +</dd></dl> +<h3 id="Description" name="Description"> Description </h3> +<p>The <code>JavaObject</code> object is an instance of a Java class that is created in or passed to JavaScript. <code>JavaObject</code> is a wrapper for the instance; all references to the class instance are made through the <code>JavaObject</code>. +</p><p>Any Java data brought into JavaScript is converted to JavaScript data types. When the <code>JavaObject</code> is passed back to Java, it is unwrapped and can be used by Java code. See the <a href="es/Core_JavaScript_1.5_Guide">Core JavaScript 1.5 Guide</a> for more information about data type conversions. +</p> +<h3 id="Properties" name="Properties"> Properties </h3> +<p>Inherits public data members from the Java class of which it is an instance as properties. It also inherits public data members from any superclass as properties. +</p> +<h3 id="Methods" name="Methods"> Methods </h3> +<p>Inherits public methods from the Java class of which it is an instance. The <code>JavaObject</code> also inherits methods from <code>java.lang.Object</code> and any other superclass. +</p> +<h3 id="Examples" name="Examples"> Examples </h3> +<h4 id="Example:_Instantiating_a_Java_Object_in_JavaScript" name="Example:_Instantiating_a_Java_Object_in_JavaScript"> Example: Instantiating a Java Object in JavaScript </h4> +<p>The following code creates the <code>JavaObject</code> <code>theString</code>, which is an instance of the class <code>java.lang.String</code>: +</p> +<pre class="eval">var theString = new Packages.java.lang.String("Hello, world"); +</pre> +<p>Because the <code>String</code> class is in the <code>java</code> package, you can also use the java synonym and omit the <code>Packages</code> keyword when you instantiate the class: +</p> +<pre class="eval">var theString = new java.lang.String("Hello, world"); +</pre> +<h4 id="Example:_Accessing_methods_of_a_Java_object" name="Example:_Accessing_methods_of_a_Java_object"> Example: Accessing methods of a Java object </h4> +<p>Because the <code>JavaObject</code> <code>theString</code> is an instance of <code>java.lang.String</code>, it inherits all the public methods of <code>java.lang.String</code>. The following example uses the <code>startsWith</code> method to check whether <code>theString</code> begins with "Hello". +</p> +<pre class="eval">var theString = new java.lang.String("Hello, world"); +theString.startsWith("Hello"); // returns true +</pre> +<h4 id="Example:_Accessing_inherited_methods" name="Example:_Accessing_inherited_methods"> Example: Accessing inherited methods </h4> +<p>Because <code>getClass</code> is a method of <code>Object</code>, and <code>java.lang.String</code> extends <code>Object</code>, the <code>String</code> class inherits the <code>getClass</code> method. Consequently, <code>getClass</code> is also a method of the <code>JavaObject</code> which instantiates <code>String</code> in JavaScript. +</p> +<pre class="eval">var theString = new java.lang.String("Hello, world"); +theString.getClass(); // returns java.lang.String +</pre> +<h3 id="See_also" name="See_also"> See also </h3> +<p><a href="es/Core_JavaScript_1.5_Reference/Global_Objects/JavaArray">JavaArray</a>, +<a href="es/Core_JavaScript_1.5_Reference/Global_Objects/JavaClass">JavaClass</a>, +<a href="es/Core_JavaScript_1.5_Reference/Global_Objects/JavaPackage">JavaPackage</a>, +<a href="es/Core_JavaScript_1.5_Reference/Global_Objects/Packages">Packages</a> +</p> +<div class="noinclude"> +</div> |