tij0108.html

学习java的经典书籍

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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>Sequence-InputStream</B></FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">Coverts
two or more 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>InputStream</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
objects into a single 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>InputStream</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">.</FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">Two
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>InputStream</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
objects or an 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>Enumeration</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
for a container of 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>InputStream</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
objects.
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">As
a source of data. Connect it to a 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>FilterInputStream</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
object to provide a useful interface.
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>Filter-InputStream</B></FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">Abstract
class which is an interface for decorators that provide useful functionality to
the other 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>InputStream</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
classes. See Table 10-3.
</FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">See
Table 10-3.
</FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">See
Table 10-3.
</FONT><P></DIV>
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<A NAME="Heading306"></A><H3 ALIGN=LEFT>
Types
of OutputStream
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">This
category includes the classes that decide where your output will go: an array
of bytes (no 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>String</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">,
however; presumably you can create one using the array of bytes), a file, or a
&#8220;pipe.&#8221;
</FONT><P></DIV><DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">In
addition, the 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>FilterOutputStream</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
provides a base class for "decorator" classes that attach attributes or useful
interfaces to output streams. This is discussed later.
</FONT><P></DIV><DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>Table
10-2. Types of OutputStream
</B></FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">Class</FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">Function</FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">Constructor
Arguments
</FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">How
to use it
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>ByteArray-OutputStream</B></FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">Creates
a buffer in memory. All the data that you send to the stream is placed in this
buffer.
</FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">Optional
initial size of the buffer.
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">To
designate the destination of your data. Connect it to a 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>FilterOutputStream</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
object to provide a useful interface.
</FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>File-OutputStream</B></FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">For
sending information to a file.
</FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">A
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>String</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
representing the file name, or a 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>File</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
or 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>FileDescriptor</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
object.
</FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">To
designate the destination of your data. Connect it to a 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>FilterOutputStream</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
object to provide a useful interface.
</FONT><P></DIV>
</TD>
</TR>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>Piped-OutputStream</B></FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">Any
information you write to this automatically ends up as input for the associated 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>PipedInput-Stream.</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
Implements the &#8220;piping&#8221; concept.
</FONT><P></DIV>
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<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>PipedInputStream</B></FONT><P></DIV>
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<TD WIDTH=157 COLSPAN=1 ROWSPAN=1 VALIGN=TOP>
<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">To
designate the destination of your data for multithreading. Connect it to a 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>FilterOutputStream</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
object to provide a useful interface.
</FONT><P></DIV>
</TD>
</TR>
<A NAME="Index1027"></A><A NAME="Index1028"></A><TR VALIGN="TOP">
<TD WIDTH=85 COLSPAN=1 ROWSPAN=2 VALIGN=TOP>
<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>Filter-OutputStream</B></FONT><P></DIV>
</TD>
<TD WIDTH=94 COLSPAN=1 ROWSPAN=2 VALIGN=TOP>
<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">Abstract
class which is an interface for decorators that provide useful functionality to
the other 
</FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black"><B>OutputStream</B></FONT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">
classes. See Table 
</FONT><P><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">10-4.</FONT><P></DIV>
</TD>
<TD WIDTH=157 COLSPAN=1 ROWSPAN=1 VALIGN=TOP>
<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">See
Table 10-4.
</FONT><P></DIV>
</TD>
</TR>
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<TD WIDTH=157 COLSPAN=1 ROWSPAN=1 VALIGN=TOP>
<DIV ALIGN=LEFT><FONT FACE="Carmina Md BT" SIZE=3 COLOR="Black">See
Table 10-4.
</FONT><P></DIV>
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