Java Utililty Methods BufferedReader Read

BufferedReader br = new BufferedReader(reader);
StringBuilder sb = new StringBuilder();
String read = br.readLine();
String newLine = System.getProperty("line.separator");
while (read != null) {
    sb.append(read);
    sb.append(newLine);
    read = br.readLine();
...

try (BufferedReader bw = new BufferedReader(new FileReader(new File(absoluteFilePath)))) {
    String output = ""; 
    String tmp = ""; 
    while ((tmp = bw.readLine()) != null) {
        output += tmp + "\n"; 
    bw.close();
    return output;
...

File aFile = new File(aFileName);
BufferedReader input = new BufferedReader(new FileReader(aFile));
ArrayList<String> outputBuffer = new ArrayList<String>();
try {
    String line = null; 
    while ((line = input.readLine()) != null) {
        outputBuffer.add(line);
} finally {
    input.close();
int nlines = outputBuffer.size();
String[] status = null;
if (nlines < 1) {
    status = new String[1];
    status[0] = "";
} else {
    status = new String[nlines];
    for (int il = 0; il < nlines; ++il) {
        status[il] = outputBuffer.get(il);
return status;

String path = "", file;
String[] S = directory.split("/");
for (int i = 0; i < S.length - 1; i++)
    path += (S[i] + "/");
file = S[S.length - 1];
File dir = new File(path);
File arq = new File(dir, file);
String text = "";
...

if (detectOS() == OTHER) {
    System.err.println("[FileUtil : readFile] Detected OS is not supported.");
    return null;
directory = checkDir(directory);
if (!new File(directory + fileName).exists()) {
    System.err.println("[FileUtil : readFile] File does not exist.");
    return null;
...

BufferedReader reader = null;
try {
    reader = new BufferedReader(new FileReader(file));
} catch (FileNotFoundException e) {
    e.printStackTrace();
    throw new RuntimeException("Can't find the file", e);
String line = null;
...

BufferedReader reader;
StringBuilder stringBuilder = new StringBuilder();
boolean toggle = false;
try {
    reader = new BufferedReader(new FileReader(file));
    String line = null;
    String ls = System.getProperty("line.separator");
    while ((line = reader.readLine()) != null) {
...

BufferedReader reader = new BufferedReader(new FileReader(file));
String line = null;
StringBuilder stringBuilder = new StringBuilder();
String ls = System.getProperty("line.separator");
while ((line = reader.readLine()) != null) {
    stringBuilder.append(line);
    stringBuilder.append(ls);
return stringBuilder.toString();

List<String> lines = new ArrayList<String>();
File emailsFile = new File(file);
try {
    FileReader fread = new FileReader(emailsFile);
    BufferedReader buffReader = new BufferedReader(fread);
    String line = " ";
    while ((line = buffReader.readLine()) != null) {
        lines.add(line);
...

BufferedReader reader = new BufferedReader(new FileReader(file));
String line = null;
StringBuilder stringBuilder = new StringBuilder();
try {
    while ((line = reader.readLine()) != null) {
        stringBuilder.append(line);
    return stringBuilder.toString().trim();
...