Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileReader;

import java.io.IOException;

public class Main {
    /**
     * read file
     *
     * @param filePath
     * @return if file not exist, return null, else return content of file
     * @throws IOException
     *             if an error occurs while operator BufferedReader
     */
    public static StringBuilder readFile(String filePath) {
        File file = new File(filePath);
        StringBuilder fileContent = new StringBuilder("");
        if (file == null || !file.isFile()) {
            return null;
        }

        BufferedReader reader = null;
        try {
            reader = new BufferedReader(new FileReader(file));
            String line = null;
            while ((line = reader.readLine()) != null) {
                if (!fileContent.toString().equals("")) {
                    fileContent.append("\r\n");
                }
                fileContent.append(line);
            }
            reader.close();
            return fileContent;
        } catch (IOException e) {
            throw new RuntimeException("IOException occurred. ", e);
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    throw new RuntimeException("IOException occurred. ", e);
                }
            }
        }
    }
}