Java IO.pdf - Nguyen Dang Binh

public class TeeCopier {
}
public static void main(String[] args) {
}
Java I/O
if (args.length != 3) {
System.out.println("Usage: java TeeCopier infile outfile1 outfile2");
return;
}
try {
FileInputStream fin = new FileInputStream(args[0]);
FileOutputStream fout1 = new FileOutputStream(args[1]);
FileOutputStream fout2 = new FileOutputStream(args[2]);
TeeOutputStream tout = new TeeOutputStream(fout1, fout2);
BufferedStreamCopier.copy(fin, tout);
fin.close();
tout.close();
}
catch (IOException e) {System.err.println(e);}
It's not hard to extend this to a MultiOutputStream class that handles an arbitrary number of
output streams. You simply need to store the list of output streams in a vector and provide an
addStream() method that adds them to the vector as needed. The methods of the class then
simply enumerate the vector, invoking the method on each element of the vector in turn.
Example 6.7 demonstrates.
Example 6.7. The MultiOutputStream Class
package com.macfaq.io;
import java.io.*;
import java.util.*;
public class MultiOutputStream extends FilterOutputStream {
Vector streams = new Vector();
public MultiOutputStream(OutputStream out) {
super(out);
streams.addElement(out);
}
public synchronized void addOutputStream(OutputStream out) {
streams.addElement(out);
}
public synchronized void write(int b) throws IOException {
}
for (Enumeration e = streams.elements(); e.hasMoreElements();) {
OutputStream out = (OutputStream) e.nextElement();
out.write(b);
}
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