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DataFileFilter
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Class DataFileFilter</H2>
<PRE>
java.lang.Object
<IMG SRC="../resources/inherit.gif" ALT="extended by">javax.swing.filechooser.FileFilter
<IMG SRC="../resources/inherit.gif" ALT="extended by"><B>lib.DataFileFilter</B>
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<DT>public class <B>DataFileFilter</B><DT>extends javax.swing.filechooser.FileFilter</DL>
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这是文件滤镜，打开或保存文件数据时过滤文件用。
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<TD><CODE><B><A HREF="../lib/DataFileFilter.html#DataFileFilter(java.lang.String, java.lang.String)">DataFileFilter</A></B>(java.lang.String extension, java.lang.String description)</CODE>
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构造一个文件滤镜类。</TD>
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../lib/DataFileFilter.html#accept(java.io.File)">accept</A></B>(java.io.File f)</CODE>
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判断一个文件是否为文件滤镜所接受。</TD>
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<CODE> java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../lib/DataFileFilter.html#getDescription()">getDescription</A></B>()</CODE>
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返回文件描述。</TD>
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<CODE> java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../lib/DataFileFilter.html#getExtension(java.io.File)">getExtension</A></B>(java.io.File f)</CODE>
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获取文件名的扩展名。</TD>
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<TD><B>Methods inherited from class java.lang.Object</B></TD>
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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<A NAME="DataFileFilter(java.lang.String, java.lang.String)"><!-- --></A><H3>
DataFileFilter</H3>
<PRE>
public <B>DataFileFilter</B>(java.lang.String extension, java.lang.String description)</PRE>
<DL>
<DD>构造一个文件滤镜类。扩展名在程序内部会被转化成小写。
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<DT><B>Parameters:</B><DD><CODE>extension</CODE> - 文件扩展名<DD><CODE>description</CODE> - 文件描述</DL>
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<A NAME="accept(java.io.File)"><!-- --></A><H3>
accept</H3>
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public boolean <B>accept</B>(java.io.File f)</PRE>
<DL>
<DD>判断一个文件是否为文件滤镜所接受。只有当一个文件的扩展名与构造方法中的extension相一致的时候才为滤镜接受。
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>f</CODE> - 文件类的实例<DT><B>Returns:</B><DD>f的扩展名与extension一致时返回true，否则返回false</DL>
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getDescription</H3>
<PRE>
public java.lang.String <B>getDescription</B>()</PRE>
<DL>
<DD>返回文件描述。
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<DD><DL>
<DT><B>Returns:</B><DD>文件的描述</DL>
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getExtension</H3>
<PRE>
public java.lang.String <B>getExtension</B>(java.io.File f)</PRE>
<DL>
<DD>获取文件名的扩展名。
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>f</CODE> - 要获取文件扩展名的文件<DT><B>Returns:</B><DD>文件f的扩展名，如果f为null则返回null。</DL>
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