Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 *   Copyright (C)  2016 android@19code.com
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

import java.io.BufferedReader;

import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;

import java.io.FileReader;

import java.io.IOException;

import java.io.InputStreamReader;

public class Main {
    public static String readFile(String filename) {
        File file = new File(filename);
        BufferedReader bufferedReader = null;
        String str = null;
        try {
            if (file.exists()) {
                bufferedReader = new BufferedReader(new FileReader(filename));
                str = bufferedReader.readLine();
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            closeIO(bufferedReader);
        }
        return str;
    }

    public static StringBuilder readFile(File file, String charsetName) {
        StringBuilder fileContent = new StringBuilder("");
        if (file == null || !file.isFile()) {
            return null;
        }
        BufferedReader reader = null;
        try {
            InputStreamReader is = new InputStreamReader(new FileInputStream(file), charsetName);
            reader = new BufferedReader(is);
            String line = null;
            while ((line = reader.readLine()) != null) {
                if (!fileContent.toString().equals("")) {
                    fileContent.append("\r\n");
                }
                fileContent.append(line);
            }
            return fileContent;
        } catch (IOException e) {
            throw new RuntimeException("IOException occurred. ", e);
        } finally {
            closeIO(reader);
        }
    }

    public static void closeIO(Closeable... closeables) {
        if (null == closeables || closeables.length <= 0) {
            return;
        }
        for (Closeable cb : closeables) {
            try {
                if (null == cb) {
                    continue;
                }
                cb.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}