馬克杯

import java.io.*;            public class JCopy{            public static void main(String args[]){            try {            JCopy j = new JCopy();            j.copyFile(new File(args[0]),new File(args[1]));            }            catch (Exception e) {            e.printStackTrace();            }            }            public void copyFile(File in, File out) throws Exception {            FileInputStream fis  = new FileInputStream(in);            FileOutputStream fos = new FileOutputStream(out);            byte[] buf = new byte[1024];            int i = 0;            while((i=fis.read(buf))!=-1) {            fos.write(buf, 0, i);            }            fis.close();            fos.close();            }            }

import java.nio.channels.*;            import java.io.*;            public class JCopy2{            public static void main(String args[]){            try {            JCopy2 j = new JCopy2();            j.copyFile(new File(args[0]),new File(args[1]));            }            catch (Exception e) {            e.printStackTrace();            }            }            public void copyFile(File in, File out) throws Exception {            FileChannel sourceChannel = new            FileInputStream(in).getChannel();            FileChannel destinationChannel = new            FileOutputStream(out).getChannel();            sourceChannel.transferTo(0, sourceChannel.size(), destinationChannel);            // or            //  destinationChannel.transferFrom(sourceChannel, 0, sourceChannel.size());            sourceChannel.close();            destinationChannel.close();            }            }