📄 canvas.html
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<CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#getWidth()">getWidth</A></B>()</CODE><BR> Gets the width in pixels of the displayable area of the <code>Canvas</code>.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#hasPointerEvents()">hasPointerEvents</A></B>()</CODE><BR> Checks if the platform supports pointer press and release events.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#hasPointerMotionEvents()">hasPointerMotionEvents</A></B>()</CODE><BR> Checks if the platform supports pointer motion events (pointer dragged).</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#hasRepeatEvents()">hasRepeatEvents</A></B>()</CODE><BR> Checks if the platform can generate repeat events when key is kept down.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#hideNotify()">hideNotify</A></B>()</CODE><BR> The implementation calls <code>hideNotify()</code> shortly after the <code>Canvas</code> has been removed from the display.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#isDoubleBuffered()">isDoubleBuffered</A></B>()</CODE><BR> Checks if the <code>Canvas</code> is double buffered by the implementation.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#keyPressed(int)">keyPressed</A></B>(int keyCode)</CODE><BR> Called when a key is pressed.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#keyReleased(int)">keyReleased</A></B>(int keyCode)</CODE><BR> Called when a key is released.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#keyRepeated(int)">keyRepeated</A></B>(int keyCode)</CODE><BR> Called when a key is repeated (held down).</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected abstract void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#paint(javax.microedition.lcdui.Graphics)">paint</A></B>(<A HREF="../../../javax/microedition/lcdui/Graphics.html">Graphics</A> g)</CODE><BR> Renders the <code>Canvas</code>.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#pointerDragged(int, int)">pointerDragged</A></B>(int x, int y)</CODE><BR> Called when the pointer is dragged.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#pointerPressed(int, int)">pointerPressed</A></B>(int x, int y)</CODE><BR> Called when the pointer is pressed.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#pointerReleased(int, int)">pointerReleased</A></B>(int x, int y)</CODE><BR> Called when the pointer is released.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#repaint()">repaint</A></B>()</CODE><BR> Requests a repaint for the entire <code>Canvas</code>.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#repaint(int, int, int, int)">repaint</A></B>(int x, int y, int width, int height)</CODE><BR> Requests a repaint for the specified region of the <code>Canvas</code>.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#serviceRepaints()">serviceRepaints</A></B>()</CODE><BR> Forces any pending repaint requests to be serviced immediately.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#setFullScreenMode(boolean)">setFullScreenMode</A></B>(boolean mode)</CODE><BR> Controls whether the <code>Canvas</code> is in full-screen mode or in normal mode.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#showNotify()">showNotify</A></B>()</CODE><BR> The implementation calls <code>showNotify()</code> immediately prior to this <code>Canvas</code> being made visible on the display.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/lcdui/Canvas.html#sizeChanged(int, int)">sizeChanged</A></B>(int w, int h)</CODE><BR> Called when the drawable area of the <code>Canvas</code> has been changed.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_javax.microedition.lcdui.Displayable"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class javax.microedition.lcdui.<A HREF="../../../javax/microedition/lcdui/Displayable.html">Displayable</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../javax/microedition/lcdui/Displayable.html#addCommand(javax.microedition.lcdui.Command)">addCommand</A>, <A HREF="../../../javax/microedition/lcdui/Displayable.html#getTicker()">getTicker</A>, <A HREF="../../../javax/microedition/lcdui/Displayable.html#getTitle()">getTitle</A>, <A HREF="../../../javax/microedition/lcdui/Displayable.html#isShown()">isShown</A>, <A HREF="../../../javax/microedition/lcdui/Displayable.html#removeCommand(javax.microedition.lcdui.Command)">removeCommand</A>, <A HREF="../../../javax/microedition/lcdui/Displayable.html#setCommandListener(javax.microedition.lcdui.CommandListener)">setCommandListener</A>, <A HREF="../../../javax/microedition/lcdui/Displayable.html#setTicker(javax.microedition.lcdui.Ticker)">setTicker</A>, <A HREF="../../../javax/microedition/lcdui/Displayable.html#setTitle(java.lang.String)">setTitle</A></CODE></TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class java.lang.Object</B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><A NAME="field_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Field Detail</B></FONT></TD></TR></TABLE><A NAME="UP"><!-- --></A><H3>UP</H3><PRE>public static final int <B>UP</B></PRE><DL><DD>Constant for the <code>UP</code> game action. <P>Constant value <code>1</code> is set to <code>UP</code>.</P></DL><HR><A NAME="DOWN"><!-- --></A><H3>DOWN</H3><PRE>public static final int <B>DOWN</B></PRE><DL><DD>Constant for the <code>DOWN</code> game action. <P>Constant value <code>6</code> is set to <code>DOWN</code>.</P></DL><HR><A NAME="LEFT"><!-- --></A><H3>LEFT</H3><PRE>public static final int <B>LEFT</B></PRE><DL><DD>Constant for the <code>LEFT</code> game action. <P>Constant value <code>2</code> is set to <code>LEFT</code>.</P></DL><HR><A NAME="RIGHT"><!-- --></A><H3>RIGHT</H3><PRE>public static final int <B>RIGHT</B></PRE><DL><DD>Constant for the <code>RIGHT</code> game action. <P>Constant value <code>5</code> is set to <code>RIGHT</code>.</P></DL><HR><A NAME="FIRE"><!-- --></A><H3>FIRE</H3><PRE>public static final int <B>FIRE</B></PRE><DL><DD>Constant for the <code>FIRE</code> game action. <P>Constant value <code>8</code> is set to <code>FIRE</code>.</P></DL><HR><A NAME="GAME_A"><!-- --></A><H3>GAME_A</H3><PRE>public static final int <B>GAME_A</B></PRE><DL><DD>Constant for the general purpose "<code>A</code>" game action. <P>Constant value <code>9</code> is set to <code>GAME_A</code>.</P></DL><HR><A NAME="GAME_B"><!-- --></A><H3>GAME_B</H3><PRE>public static final int <B>GAME_B</B></PRE><DL><DD>Constant for the general purpose "<code>B</code>" game action. <P>Constant value <code>10</code> is set to <code>GAME_B</code>.</P></DL><HR><A NAME="GAME_C"><!-- --></A><H3>GAME_C</H3><PRE>public static final int <B>GAME_C</B></PRE><DL><DD>Constant for the general purpose "<code>C</code>" game action. <P>Constant value <code>11</code> is set to <code>GAME_C</code>.</P></DL><HR><A NAME="GAME_D"><!-- --></A><H3>GAME_D</H3><PRE>public static final int <B>GAME_D</B></PRE><DL><DD>Constant for the general purpose "<code>D</code>" game action. <P>Constant value <code>12</code> is set to <code>GAME_D</code>.</P></DL><HR><A NAME="KEY_NUM0"><!-- --></A><H3>KEY_NUM0</H3><PRE>public static final int <B>KEY_NUM0</B></PRE><DL><DD>keyCode for ITU-T key <code>0</code>. <P>Constant value <code>48</code> is set to <code>KEY_NUM0</code>.</P></DL><HR><A NAME="KEY_NUM1"><!-- --></A><H3>KEY_NUM1</H3><PRE>public static final int <B>KEY_NUM1</B></PRE><DL><DD>keyCode for ITU-T key <code>1</code>. <P>Constant value <code>49</code> is set to <code>KEY_NUM1</code>.</P></DL><HR><A NAME="KEY_NUM2"><!-- --></A><H3>⌨️ 快捷键说明
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