Java Utililty Methods BufferedReader Read

String res = "";
BufferedReader br = null;
br = new BufferedReader(new FileReader(f));
String line = null;
while ((line = br.readLine()) != null) {
    res += line;
try {
...

BufferedReader br = null;
try {
    br = new BufferedReader(new FileReader(f));
    StringBuilder sb = new StringBuilder();
    String line = br.readLine();
    while (line != null) {
        sb.append(line);
        line = br.readLine();
...

Map<String, String> map = new HashMap<>();
try {
    BufferedReader buffer = new BufferedReader(new FileReader(f));
    buffer.lines().filter(s -> s.matches("(?!#).*[ ]?=[ ]?.*")).forEach(s -> {
        String k[] = s.split("=");
        k[1] = k[1].split("#")[0].trim();
        map.put(k[0].trim(), k[1]);
    });
...

BufferedReader br = new BufferedReader(new FileReader(f));
ByteArrayOutputStream baos = new ByteArrayOutputStream(4096);
int b = -1;
while ((b = br.read()) != -1) {
    baos.write(b);
baos.close();
return new String(baos.toByteArray());
...

StringBuffer fileData = new StringBuffer(1000);
BufferedReader reader = new BufferedReader(new FileReader(f));
char[] buf = new char[1024];
int numRead = 0;
while ((numRead = reader.read(buf)) != -1) {
    String readData = String.valueOf(buf, 0, numRead);
    fileData.append(readData);
    buf = new char[1024];
...

List<String> data = new ArrayList<String>();
try {
    BufferedReader br = new BufferedReader(new FileReader(f));
    while (br.ready()) {
        data.add(br.readLine());
    return data;
} catch (FileNotFoundException e) {
...

try {
    StringBuilder sb = new StringBuilder();
    java.io.BufferedReader br = new BufferedReader(new FileReader(f));
    String line = null;
    while ((line = br.readLine()) != null) {
        sb.append((sb.length() > 0 ? (keep_newline ? "\n" : " ") : "") + line);
    br.close();
...

StringBuilder content = new StringBuilder();
String line = null;
BufferedReader br = null;
try {
    mylogger.log(Level.INFO, "Reading: [{0}] File: [{1}]",
            new Object[] { f.getName(), f.getAbsolutePath() });
    br = new BufferedReader(new FileReader(f));
    while ((line = br.readLine()) != null) {
...

if (f.length() > 5000000)
    return "File too long";
BufferedReader buf = new BufferedReader(new FileReader(f));
StringBuffer results = new StringBuffer();
while (buf.ready()) {
    results.append(buf.readLine()).append(newLineChar);
return results.toString();
...

BufferedReader reader;
try {
    reader = new BufferedReader(new FileReader(file));
} catch (FileNotFoundException e) {
    return "";
StringBuilder sb = new StringBuilder();
String line = reader.readLine();
...