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AppletStub.java
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111 lines (103 loc) · 2.87 KB
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/*
* Copyright (c) 1995, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package java.applet;
import java.net.URL;
/**
* When an applet is first created, an applet stub is attached to it
* using the applet's <code>setStub</code> method. This stub
* serves as the interface between the applet and the browser
* environment or applet viewer environment in which the application
* is running.
*
* @author Arthur van Hoff
* @see java.applet.Applet#setStub(java.applet.AppletStub)
* @since JDK1.0
*/
public interface AppletStub {
/**
* Determines if the applet is active. An applet is active just
* before its <code>start</code> method is called. It becomes
* inactive just before its <code>stop</code> method is called.
*
* @return <code>true</code> if the applet is active;
* <code>false</code> otherwise.
*/
boolean isActive();
/**
* Gets the URL of the document in which the applet is embedded.
* For example, suppose an applet is contained
* within the document:
* <blockquote><pre>
* http://www.oracle.com/technetwork/java/index.html
* </pre></blockquote>
* The document base is:
* <blockquote><pre>
* http://www.oracle.com/technetwork/java/index.html
* </pre></blockquote>
*
* @return the {@link java.net.URL} of the document that contains the
* applet.
* @see java.applet.AppletStub#getCodeBase()
*/
URL getDocumentBase();
/**
* Gets the base URL. This is the URL of the directory which contains the applet.
*
* @return the base {@link java.net.URL} of
* the directory which contains the applet.
* @see java.applet.AppletStub#getDocumentBase()
*/
URL getCodeBase();
/**
* Returns the value of the named parameter in the HTML tag. For
* example, if an applet is specified as
* <blockquote><pre>
* <applet code="Clock" width=50 height=50>
* <param name=Color value="blue">
* </applet>
* </pre></blockquote>
* <p>
* then a call to <code>getParameter("Color")</code> returns the
* value <code>"blue"</code>.
*
* @param name a parameter name.
* @return the value of the named parameter,
* or <tt>null</tt> if not set.
*/
String getParameter(String name);
/**
* Returns the applet's context.
*
* @return the applet's context.
*/
AppletContext getAppletContext();
/**
* Called when the applet wants to be resized.
*
* @param width the new requested width for the applet.
* @param height the new requested height for the applet.
*/
void appletResize(int width, int height);
}