Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;

import java.io.IOException;
import java.io.InputStream;

public class Main {

    public static byte[] readFile(String filePath) {
        try {
            if (isFileExist(filePath)) {
                FileInputStream fi = new FileInputStream(filePath);
                return readInputStream(fi);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static boolean isFileExist(String filePath) {
        File file = new File(filePath);
        return file.exists();
    }

    public static byte[] readInputStream(InputStream in) {
        try {
            ByteArrayOutputStream os = new ByteArrayOutputStream();

            byte[] b = new byte[in.available()];
            int length = 0;
            while ((length = in.read(b)) != -1) {
                os.write(b, 0, length);
            }

            b = os.toByteArray();

            in.close();
            in = null;

            os.close();
            os = null;

            return b;

        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}