Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.io.FileInputStream;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.channels.FileChannel;
import java.nio.charset.Charset;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static void main(String[] argv) throws Exception {
        Pattern pattern = Pattern.compile("pattern");
        FileInputStream input = new FileInputStream("file.txt");
        FileChannel channel = input.getChannel();

        ByteBuffer bbuf = channel.map(FileChannel.MapMode.READ_ONLY, 0, (int) channel.size());
        CharBuffer cbuf = Charset.forName("8859_1").newDecoder().decode(bbuf);

        Matcher matcher = pattern.matcher(cbuf);
        while (matcher.find()) {
            String match = matcher.group();
            System.out.println(match);
        }
    }
}