gnu.gcj.xlib

Class Display


public class Display
extends Object

A connection to an X11 display.

Constructor Summary

Display()
The basic constructor.

Method Summary

protected void
addXID(int xid, XID window)
protected void
finalize()
Called on an object by the Virtual Machine at most once, at some point after the Object is determined unreachable but before it is destroyed.
void
flush()
int
getAtom(String name)
String
getAtomName(int atom)
Window
getDefaultRootWindow()
Screen
getDefaultScreen()
int
getDefaultScreenNumber()
Window
getWindow(int xid)
XID
getXID(int xid)
protected void
removeXID(int xid)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Display

public Display()
The basic constructor. Object is special, because it has no superclass, so there is no call to super().

Method Details

addXID

protected final void addXID(int xid,
                            XID window)

finalize

protected void finalize()
Called on an object by the Virtual Machine at most once, at some point after the Object is determined unreachable but before it is destroyed. You would think that this means it eventually is called on every Object, but this is not necessarily the case. If execution terminates abnormally, garbage collection does not always happen. Thus you cannot rely on this method to always work. For finer control over garbage collection, use references from the java.lang.ref package.

Virtual Machines are free to not call this method if they can determine that it does nothing important; for example, if your class extends Object and overrides finalize to do simply super.finalize().

finalize() will be called by a Thread that has no locks on any Objects, and may be called concurrently. There are no guarantees on the order in which multiple objects are finalized. This means that finalize() is usually unsuited for performing actions that must be thread-safe, and that your implementation must be use defensive programming if it is to always work.

If an Exception is thrown from finalize() during garbage collection, it will be patently ignored and the Object will still be destroyed.

It is allowed, although not typical, for user code to call finalize() directly. User invocation does not affect whether automatic invocation will occur. It is also permitted, although not recommended, for a finalize() method to "revive" an object by making it reachable from normal code again.

Unlike constructors, finalize() does not get called for an object's superclass unless the implementation specifically calls super.finalize().

The default implementation does nothing.

Overrides:
finalize in interface Object

flush

public void flush()

getAtom

public final int getAtom(String name)

getAtomName

public final String getAtomName(int atom)

getDefaultRootWindow

public final Window getDefaultRootWindow()

getDefaultScreen

public final Screen getDefaultScreen()

getDefaultScreenNumber

public final int getDefaultScreenNumber()

getWindow

public final Window getWindow(int xid)

getXID

public final XID getXID(int xid)

removeXID

protected final void removeXID(int xid)

Copyright (C) 1999, 2000 Free Software Foundation This file is part of libgcj. This software is copyrighted work licensed under the terms of the Libgcj License. Please consult the file "LIBGCJ_LICENSE" for details.