MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;

public class MainClass {

    public static void main(String args[]) {
        FileInputStream fIn;
        FileOutputStream fOut;
        FileChannel fIChan, fOChan;
        long fSize;
        MappedByteBuffer mBuf;

        try {
            fIn = new FileInputStream(args[0]);
            fOut = new FileOutputStream(args[1]);

            fIChan = fIn.getChannel();
            fOChan = fOut.getChannel();

            fSize = fIChan.size();

            mBuf = fIChan.map(FileChannel.MapMode.READ_ONLY, 0, fSize);

            fOChan.write(mBuf); // this copies the file

            fIChan.close();
            fIn.close();

            fOChan.close();
            fOut.close();
        } catch (IOException exc) {
            System.out.println(exc);
            System.exit(1);
        } catch (ArrayIndexOutOfBoundsException exc) {
            System.out.println("Usage: Copy from to");
            System.exit(1);
        }
    }
}