file.html

API資料大全

<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/io/File.html#setReadOnly()">setReadOnly</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Marks the file or directory named by this abstract pathname so that
 only read operations are allowed.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../java/lang/String.html">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/io/File.html#toString()">toString</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the pathname string of this abstract pathname.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../java/net/URL.html">URL</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../java/io/File.html#toURL()">toURL</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Converts this abstract pathname into a <code>file:</code> URL.</TD>
</TR>
</TABLE>
&nbsp;<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.<A HREF="../../java/lang/Object.html">Object</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../java/lang/Object.html#clone()">clone</A>, <A HREF="../../java/lang/Object.html#finalize()">finalize</A>, <A HREF="../../java/lang/Object.html#getClass()">getClass</A>, <A HREF="../../java/lang/Object.html#notify()">notify</A>, <A HREF="../../java/lang/Object.html#notifyAll()">notifyAll</A>, <A HREF="../../java/lang/Object.html#wait()">wait</A>, <A HREF="../../java/lang/Object.html#wait(long)">wait</A>, <A HREF="../../java/lang/Object.html#wait(long, int)">wait</A></CODE></TD>
</TR>
</TABLE>
&nbsp;
<P>

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<B>Field Detail</B></FONT></TD>
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<A NAME="separatorChar"><!-- --></A><H3>
separatorChar</H3>
<PRE>
public static final char <B>separatorChar</B></PRE>
<DL>
<DD>The system-dependent default name-separator character.  This field is
 initialized to contain the first character of the value of the system
 property <code>file.separator</code>.  On UNIX systems the value of this
 field is <code>'/'</code>; on Win32 systems it is <code>'\'</code>.<DD><DL>
<DT><B>See Also: </B><DD><A HREF="../../java/lang/System.html#getProperty(java.lang.String)"><CODE>System.getProperty(java.lang.String)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="separator"><!-- --></A><H3>
separator</H3>
<PRE>
public static final <A HREF="../../java/lang/String.html">String</A> <B>separator</B></PRE>
<DL>
<DD>The system-dependent default name-separator character, represented as a
 string for convenience.  This string contains a single character, namely
 <code><A HREF="../../java/io/File.html#separatorChar"><CODE>separatorChar</CODE></A></code>.</DL>
<HR>

<A NAME="pathSeparatorChar"><!-- --></A><H3>
pathSeparatorChar</H3>
<PRE>
public static final char <B>pathSeparatorChar</B></PRE>
<DL>
<DD>The system-dependent path-separator character.  This field is
 initialized to contain the first character of the value of the system
 property <code>path.separator</code>.  This character is used to
 separate filenames in a sequence of files given as a <em>path list</em>.
 On UNIX systems, this character is <code>':'</code>; on Win32 systems it
 is <code>';'</code>.<DD><DL>
<DT><B>See Also: </B><DD><A HREF="../../java/lang/System.html#getProperty(java.lang.String)"><CODE>System.getProperty(java.lang.String)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="pathSeparator"><!-- --></A><H3>
pathSeparator</H3>
<PRE>
public static final <A HREF="../../java/lang/String.html">String</A> <B>pathSeparator</B></PRE>
<DL>
<DD>The system-dependent path-separator character, represented as a string
 for convenience.  This string contains a single character, namely
 <code><A HREF="../../java/io/File.html#pathSeparatorChar"><CODE>pathSeparatorChar</CODE></A></code>.</DL>

<!-- ========= CONSTRUCTOR DETAIL ======== -->

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<A NAME="File(java.lang.String)"><!-- --></A><H3>
File</H3>
<PRE>
public <B>File</B>(<A HREF="../../java/lang/String.html">String</A>&nbsp;pathname)</PRE>
<DL>
<DD>Creates a new <code>File</code> instance by converting the given
 pathname string into an abstract pathname.  If the given string is
 the empty string, then the result is the empty abstract pathname.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>pathname</CODE> - A pathname string<DT><B>Throws:</B><DD><CODE><A HREF="../../java/lang/NullPointerException.html">NullPointerException</A></CODE> - If the <code>pathname</code> argument is <code>null</code></DL>
</DD>
</DL>
<HR>

<A NAME="File(java.lang.String, java.lang.String)"><!-- --></A><H3>
File</H3>
<PRE>
public <B>File</B>(<A HREF="../../java/lang/String.html">String</A>&nbsp;parent,
            <A HREF="../../java/lang/String.html">String</A>&nbsp;child)</PRE>
<DL>
<DD>Creates a new <code>File</code> instance from a parent pathname string
 and a child pathname string.

 <p> If <code>parent</code> is <code>null</code> then the new
 <code>File</code> instance is created as if by invoking the
 single-argument <code>File</code> constructor on the given
 <code>child</code> pathname string.

 <p> Otherwise the <code>parent</code> pathname string is taken to denote
 a directory, and the <code>child</code> pathname string is taken to
 denote either a directory or a file.  If the <code>child</code> pathname
 string is absolute then it is converted into a relative pathname in a
 system-dependent way.  If <code>parent</code> is the empty string then
 the new <code>File</code> instance is created by converting
 <code>child</code> into an abstract pathname and resolving the result
 against a system-dependent default directory.  Otherwise each pathname
 string is converted into an abstract pathname and the child abstract
 pathname is resolved against the parent.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>parent</CODE> - The parent pathname string<DD><CODE>child</CODE> - The child pathname string<DT><B>Throws:</B><DD><CODE><A HREF="../../java/lang/NullPointerException.html">NullPointerException</A></CODE> - If <code>child</code> is <code>null</code></DL>
</DD>
</DL>
<HR>

<A NAME="File(java.io.File, java.lang.String)"><!-- --></A><H3>
File</H3>
<PRE>
public <B>File</B>(<A HREF="../../java/io/File.html">File</A>&nbsp;parent,
            <A HREF="../../java/lang/String.html">String</A>&nbsp;child)</PRE>
<DL>
<DD>Creates a new <code>File</code> instance from a parent abstract
 pathname and a child pathname string.

 <p> If <code>parent</code> is <code>null</code> then the new
 <code>File</code> instance is created as if by invoking the
 single-argument <code>File</code> constructor on the given
 <code>child</code> pathname string.

 <p> Otherwise the <code>parent</code> abstract pathname is taken to
 denote a directory, and the <code>child</code> pathname string is taken
 to denote either a directory or a file.  If the <code>child</code>
 pathname string is absolute then it is converted into a relative
 pathname in a system-dependent way.  If <code>parent</code> is the empty
 abstract pathname then the new <code>File</code> instance is created by
 converting <code>child</code> into an abstract pathname and resolving
 the result against a system-dependent default directory.  Otherwise each
 pathname string is converted into an abstract pathname and the child
 abstract pathname is resolved against the parent.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>parent</CODE> - The parent abstract pathname<DD><CODE>child</CODE> - The child pathname string<DT><B>Throws:</B><DD><CODE><A HREF="../../java/lang/NullPointerException.html">NullPointerException</A></CODE> - If <code>child</code> is <code>null</code></DL>
</DD>
</DL>

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<A NAME="getName()"><!-- --></A><H3>
getName</H3>
<PRE>
public <A HREF="../../java/lang/String.html">String</A> <B>getName</B>()</PRE>
<DL>
<DD>Returns the name of the file or directory denoted by this abstract
 pathname.  This is just the last name in the pathname's name
 sequence.  If the pathname's name sequence is empty, then the empty
 string is returned.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>The name of the file or directory denoted by this abstract
          pathname, or the empty string if this pathname's name sequence
          is empty</DL>
</DD>
</DL>
<HR>

<A NAME="getParent()"><!-- --></A><H3>
getParent</H3>
<PRE>
public <A HREF="../../java/lang/String.html">String</A> <B>getParent</B>()</PRE>
<DL>
<DD>Returns the pathname string of this abstract pathname's parent, or
 <code>null</code> if this pathname does not name a parent directory.

 <p> The <em>parent</em> of an abstract pathname consists of the
 pathname's prefix, if any, and each name in the pathname's name
 sequence except for the last.  If the name sequence is empty then
 the pathname does not name a parent directory.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>The pathname string of the parent directory named by this
          abstract pathname, or <code>null</code> if this pathname
          does not name a parent</DL>
</DD>
</DL>
<HR>

<A NAME="getParentFile()"><!-- --></A><H3>
getParentFile</H3>
<PRE>
public <A HREF="../../java/io/File.html">File</A> <B>getParentFile</B>()</PRE>
<DL>
<DD>Returns the abstract pathname of this abstract pathname's parent,
 or <code>null</code> if this pathname does not name a parent
 directory.

 <p> The <em>parent</em> of an abstract pathname consists of the
 pathname's prefix, if any, and each name in the pathname's name
 sequence except for the last.  If the name sequence is empty then
 the pathname does not name a parent directory.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>The abstract pathname of the parent directory named by this
          abstract pathname, or <code>null</code> if this pathname
          does not name a parent<DT><B>Since: </B><DD>1.2</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="getPath()"><!-- --></A><H3>
getPath</H3>
<PRE>
public <A HREF="../../java/lang/String.html">String</A> <B>getPath</B>()</PRE>
<DL>
<DD>Converts this abstract pathname into a pathname string.  The resulting
 string uses the <A HREF="../../java/io/File.html#separator"><CODE>default name-separator character</CODE></A> to
 separate the names in the name sequence.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>The string form of this abstract pathname</DL>
</DD>
</DL>
<HR>

<A NAME="isAbsolute()"><!-- --></A><H3>
isAbsolute</H3>
<PRE>
public boolean <B>isAbsolute</B>()</PRE>
<DL>
<DD>Tests whether this abstract pathname is absolute.  The definition of
 absolute pathname is system dependent.  On UNIX systems, a pathname is