Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.io.FileInputStream;
import java.io.IOException;
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 CharSequence fromFile(String filename) throws IOException {
        FileInputStream fis = new FileInputStream(filename);
        FileChannel fc = fis.getChannel();

        // Create a read-only CharBuffer on the file
        ByteBuffer bbuf = fc.map(FileChannel.MapMode.READ_ONLY, 0, (int) fc.size());
        CharBuffer cbuf = Charset.forName("8859_1").newDecoder().decode(bbuf);
        return cbuf;
    }

    public static void main(String[] argv) throws Exception {
        // Create matcher on file
        Pattern pattern = Pattern.compile("pattern");
        Matcher matcher = pattern.matcher(fromFile("infile.txt"));

        // Find all matches
        while (matcher.find()) {
            // Get the matching string
            String match = matcher.group();
        }
    }
}