Mega Code Archive
Using a Channel to Write a String to a File
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import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
public class MainClass {
public static void main(String[] args) {
String phrase = new String("text \n");
String dirname = "C:/test";
String filename = "charData.txt";
File dir = new File(dirname);
File aFile = new File(dir, filename);
FileOutputStream outputFile = null;
try {
outputFile = new FileOutputStream(aFile, true);
System.out.println("File stream created successfully.");
} catch (FileNotFoundException e) {
e.printStackTrace(System.err);
}
FileChannel outChannel = outputFile.getChannel();
ByteBuffer buf = ByteBuffer.allocate(1024);
System.out.println("New buffer: position = " + buf.position() + "\tLimit = "
+ buf.limit() + "\tcapacity = " + buf.capacity());
for (char ch : phrase.toCharArray()) {
buf.putChar(ch);
}
System.out.println("Buffer after loading: position = " + buf.position() + "\tLimit = "
+ buf.limit() + "\tcapacity = " + buf.capacity());
buf.flip();
System.out.println("Buffer after flip: position = " + buf.position() + "\tLimit = "
+ buf.limit() + "\tcapacity = " + buf.capacity());
try {
outChannel.write(buf);
outputFile.close();
System.out.println("Buffer contents written to file.");
} catch (IOException e) {
e.printStackTrace(System.err);
}
}
}
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