26 lines
761 B
Java
26 lines
761 B
Java
//: io/ChannelCopy.java
|
|
// Copying a file using channels and buffers
|
|
// {Args: ChannelCopy.java test.txt}
|
|
import java.nio.*;
|
|
import java.nio.channels.*;
|
|
import java.io.*;
|
|
|
|
public class ChannelCopy {
|
|
private static final int BSIZE = 1024;
|
|
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();
|
|
ByteBuffer buffer = ByteBuffer.allocate(BSIZE);
|
|
while(in.read(buffer) != -1) {
|
|
buffer.flip(); // Prepare for writing
|
|
out.write(buffer);
|
|
buffer.clear(); // Prepare for reading
|
|
}
|
|
}
|
|
} ///:~
|