FileChannel: read(ByteBuffer dst) : FileChannel « java.nio.channels « Java by API






  1. Java by API
  2. java.nio.channels
  3. FileChannel

FileChannel: read(ByteBuffer dst)

   
import java.io.FileInputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class Main {
  private static final int BSIZE = 1024;

  public static void main(String[] args) throws Exception {
    FileChannel fc = new FileInputStream("data.txt").getChannel();
    ByteBuffer buff = ByteBuffer.allocate(BSIZE);
    fc.read(buff);
    buff.flip();
    while (buff.hasRemaining())
      System.out.print((char) buff.get());
  }
}








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6.FileChannel: position()
7.FileChannel: position(long newPosition)
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9.FileChannel: transferFrom(ReadableByteChannel src, long position, long count)
10.FileChannel: transferTo(long position, long count, WritableByteChannel target)
11.FileChannel: tryLock()
12.FileChannel: write(MappedByteBuffer buffer)
13.FileChannel: write(ByteBuffer buffer)