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| java.applet.AppletContext
| AppletContext | | public interface AppletContext (Code) | | This interface corresponds to an applet's environment: the
document containing the applet and the other applets in the same
document.
The methods in this interface can be used by an applet to obtain
information about its environment.
author:
Arthur van Hoff
version:
1.41, 05/05/07
since:
JDK1.0 |
| Method Summary | |
| Applet | getApplet(String name)
Finds and returns the applet in the document represented by this
applet context with the given name. | | Enumeration<Applet> | getApplets()
Finds all the applets in the document represented by this applet
context. | | AudioClip | getAudioClip(URL url)
Creates an audio clip.
Parameters:
url - an absolute URL giving the location of the audio clip. | | Image | getImage(URL url)
Returns an Image object that can then be painted on
the screen. | | public InputStream | getStream(String key)
Returns the stream to which specified key is associated within this
applet context. | | public Iterator<String> | getStreamKeys()
Finds all the keys of the streams in this applet context.
For security reasons, mapping of streams and keys exists for each
codebase. | | public void | setStream(String key, InputStream stream)
Associates the specified stream with the specified key in this
applet context. | | void | showDocument(URL url)
Requests that the browser or applet viewer show the Web page
indicated by the url argument. | | public void | showDocument(URL url, String target)
Requests that the browser or applet viewer show the Web page
indicated by the url argument. | | void | showStatus(String status)
Requests that the argument string be displayed in the
"status window". |
| getApplet | | Applet getApplet(String name)(Code) | | Finds and returns the applet in the document represented by this
applet context with the given name. The name can be set in the
HTML tag by setting the name attribute.
Parameters:
name - an applet name. the applet with the given name, or null ifnot found. |
| getApplets | | Enumeration<Applet> getApplets()(Code) | | Finds all the applets in the document represented by this applet
context.
an enumeration of all applets in the document represented bythis applet context. |
| getAudioClip | | AudioClip getAudioClip(URL url)(Code) | | Creates an audio clip.
Parameters:
url - an absolute URL giving the location of the audio clip. the audio clip at the specified URL. |
| getImage | | Image getImage(URL url)(Code) | | Returns an Image object that can then be painted on
the screen. The url argument that is
passed as an argument must specify an absolute URL.
This method always returns immediately, whether or not the image
exists. When the applet attempts to draw the image on the screen,
the data will be loaded. The graphics primitives that draw the
image will incrementally paint on the screen.
Parameters:
url - an absolute URL giving the location of the image. the image at the specified URL.
See Also: java.awt.Image |
| getStream | | public InputStream getStream(String key)(Code) | | Returns the stream to which specified key is associated within this
applet context. Returns null if the applet context contains
no stream for this key.
For security reasons, mapping of streams and keys exists for each
codebase. In other words, applet from one codebase cannot access
the streams created by an applet from a different codebase
the stream to which this applet context maps the key
Parameters:
key - key whose associated stream is to be returned.
since:
1.4 |
| getStreamKeys | | public Iterator<String> getStreamKeys()(Code) | | Finds all the keys of the streams in this applet context.
For security reasons, mapping of streams and keys exists for each
codebase. In other words, applet from one codebase cannot access
the streams created by an applet from a different codebase
an Iterator of all the names of the streams in this applet context.
since:
1.4 |
| setStream | | public void setStream(String key, InputStream stream) throws IOException(Code) | | Associates the specified stream with the specified key in this
applet context. If the applet context previously contained a mapping
for this key, the old value is replaced.
For security reasons, mapping of streams and keys exists for each
codebase. In other words, applet from one codebase cannot access
the streams created by an applet from a different codebase
Parameters:
key - key with which the specified value is to be associated.
Parameters:
stream - stream to be associated with the specified key. If thisparameter is null, the specified key is removed in this applet context. IOException if the stream size exceeds a certainsize limit. Size limit is decided by the implementor of thisinterface.
since:
1.4 |
| showDocument | | void showDocument(URL url)(Code) | | Requests that the browser or applet viewer show the Web page
indicated by the url argument. The browser or
applet viewer determines which window or frame to display the
Web page. This method may be ignored by applet contexts that
are not browsers.
Parameters:
url - an absolute URL giving the location of the document. |
| showDocument | | public void showDocument(URL url, String target)(Code) | | Requests that the browser or applet viewer show the Web page
indicated by the url argument. The
target argument indicates in which HTML frame the
document is to be displayed.
The target argument is interpreted as follows:
| Target Argument | Description |
|---|
"_self" | Show in the window and frame that
contain the applet. |
"_parent" | Show in the applet's parent frame. If
the applet's frame has no parent frame,
acts the same as "_self". |
"_top" | Show in the top-level frame of the applet's
window. If the applet's frame is the
top-level frame, acts the same as "_self". |
"_blank" | Show in a new, unnamed
top-level window. |
| name | Show in the frame or window named name. If
a target named name does not already exist, a
new top-level window with the specified name is created,
and the document is shown there. |
An applet viewer or browser is free to ignore showDocument.
Parameters:
url - an absolute URL giving the location of the document.
Parameters:
target - a String indicating where to displaythe page. |
| showStatus | | void showStatus(String status)(Code) | | Requests that the argument string be displayed in the
"status window". Many browsers and applet viewers
provide such a window, where the application can inform users of
its current state.
Parameters:
status - a string to display in the status window. |
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