Admin: 1 версия

2010-06-01T05:19:15Z

1 версия

в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

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== Using a Formatter Object to Load a Buffer ==



<source lang="java">
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.channels.FileChannel;
import java.util.Formatter;
public class MainClass {
public static void main(String[] args) {
String[] phrases = { "A", "B 1", "C 1.3" };
String dirname = "C:/test";
String filename = "Phrases.txt";
File dir = new File(dirname);
File aFile = new File(dir, filename);
FileOutputStream outputFile = null;
try {
outputFile = new FileOutputStream(aFile, true);
} catch (FileNotFoundException e) {
e.printStackTrace(System.err);
}
FileChannel outChannel = outputFile.getChannel();
ByteBuffer buf = ByteBuffer.allocate(1024);
System.out.println(buf.position());
System.out.println(buf.limit());
System.out.println(buf.capacity());
CharBuffer charBuf = buf.asCharBuffer();
System.out.println(charBuf.position());
System.out.println(charBuf.limit());
System.out.println(charBuf.capacity());
Formatter formatter = new Formatter(charBuf);
int number = 0;
for (String phrase : phrases) {
formatter.format("%n %s", ++number, phrase);
System.out.println(charBuf.position());
System.out.println(charBuf.limit());
System.out.println(charBuf.capacity());
charBuf.flip();
System.out.println(charBuf.position());
System.out.println(charBuf.limit());
System.out.println(charBuf.length());
buf.limit(2 * charBuf.length()); // Set byte buffer limit
System.out.println(buf.position());
System.out.println(buf.limit());
System.out.println(buf.remaining());
try {
outChannel.write(buf);
buf.clear();
charBuf.clear();
} catch (IOException e) {
e.printStackTrace(System.err);
}
}
try {
outputFile.close();
} catch (IOException e) {
e.printStackTrace(System.err);
}
}
}</source>

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Admin: 1 версия

в 17:44, 31 мая 2010