MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.FileNotFoundException;
import java.nio.ByteBuffer;
import java.nio.Buffer;
import java.nio.LongBuffer;
import java.nio.BufferUnderflowException;
import java.nio.channels.FileChannel;

public class MainClass {
    public static void main(String[] args) {
        File aFile = new File("data.dat");
        FileInputStream inFile = null;

        try {
            inFile = new FileInputStream(aFile);
        } catch (FileNotFoundException e) {
            e.printStackTrace(System.err);
            System.exit(1);
        }

        FileChannel inChannel = inFile.getChannel();
        final int COUNT = 6;
        ByteBuffer buf = ByteBuffer.allocate(8 * COUNT);
        long[] data = new long[COUNT];
        try {
            int pos = 0;
            while (inChannel.read(buf) != -1) {
                try {
                    ((ByteBuffer) (buf.flip())).asLongBuffer().get(data);
                    pos = data.length;
                } catch (BufferUnderflowException e) {
                    LongBuffer longBuf = buf.asLongBuffer();
                    pos = longBuf.remaining();
                    longBuf.get(data, 0, pos);
                }
                System.out.println();
                for (int i = 0; i < pos; i++) {
                    System.out.printf("%10d", data[i]);
                }
                buf.clear();
            }
            System.out.println("\nEOF reached.");
            inFile.close();
        } catch (IOException e) {
            e.printStackTrace(System.err);
            System.exit(1);
        }
    }
}