Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2010-12  Ciaran Gultnieks, ciaran@ciarang.com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

import java.io.BufferedReader;
import java.io.Closeable;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;

public class Main {
    public static int countSubstringOccurrence(File file, String substring) throws IOException {
        int count = 0;
        BufferedReader reader = null;
        try {

            reader = new BufferedReader(new FileReader(file));
            while (true) {
                String line = reader.readLine();
                if (line == null) {
                    break;
                }
                count += countSubstringOccurrence(line, substring);
            }

        } finally {
            closeQuietly(reader);
        }
        return count;
    }

    /**
     * Thanks to http://stackoverflow.com/a/767910
     */
    public static int countSubstringOccurrence(String toSearch, String substring) {
        int count = 0;
        int index = 0;
        while (true) {
            index = toSearch.indexOf(substring, index);
            if (index == -1) {
                break;
            }
            count++;
            index += substring.length();
        }
        return count;
    }

    public static void closeQuietly(Closeable closeable) {
        if (closeable == null) {
            return;
        }
        try {
            closeable.close();
        } catch (IOException ioe) {
            // ignore
        }
    }
}