transferto.java

经典java书籍《thinking in java（第三版）》的源码

//: c12:TransferTo.java
// Using transferTo() between channels
// {Args: TransferTo.java TransferTo.txt}
// {Clean: TransferTo.txt} 
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
import java.io.*;
import java.nio.*;
import java.nio.channels.*;

public class TransferTo {
  public static void main(String[] args) throws Exception {
    if(args.length != 2) {
      System.out.println("arguments: sourcefile destfile");
      System.exit(1);
    }
    FileChannel 
      in = new FileInputStream(args[0]).getChannel(),
      out = new FileOutputStream(args[1]).getChannel();
    in.transferTo(0, in.size(), out);
    // Or:
    // out.transferFrom(in, 0, in.size());
  }
} ///:~