Java Utililty Methods BufferedReader Read All

BufferedReader br = null;
try {
    br = new BufferedReader(new InputStreamReader(new FileInputStream(f)));
    StringBuilder sb = new StringBuilder();
    String line;
    while ((line = br.readLine()) != null) {
        sb.append(line);
    return sb.toString();
} catch (IOException e) {
    throw new RuntimeException(e);
} finally {
    if (br != null) {
        try {
            br.close();
        } catch (IOException e) {
            throw new RuntimeException(e);

BufferedReader reader = new BufferedReader(new FileReader(file));
List<String> lines = new ArrayList<String>();
while (reader.ready())
    lines.add(reader.readLine());
reader.close();
return lines;

List<String> data = new ArrayList<>();
if (file.isDirectory() || !file.canRead() || !file.exists() || file.isHidden())
    return data;
try (BufferedReader br = new BufferedReader(new FileReader(file))) {
    String read = null;
    while ((read = br.readLine()) != null)
        data.add(read);
} catch (Exception e) {
...

char[] buffer = new char[1 << 16];
StringBuilder content = new StringBuilder();
BufferedReader reader = new BufferedReader(new FileReader(file));
while (reader.ready()) {
    int count = reader.read(buffer, 0, buffer.length);
    if (count > 0)
        content.append(buffer, 0, count);
reader.close();
return content.toString();

List<String> result = new ArrayList<String>();
BufferedReader reader = null;
InputStreamReader in = null;
try {
    in = new FileReader(input);
    reader = new BufferedReader(in);
    String line = reader.readLine();
    while (line != null) {
...

final StringBuffer buffer = new StringBuffer();
final BufferedReader in = new BufferedReader(reader);
int ch;
while ((ch = in.read()) > -1) {
    buffer.append((char) ch);
in.close();
return buffer.toString();
...

return readAll(in, new StringBuilder());

StringBuffer sb = new StringBuffer();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line;
while ((line = reader.readLine()) != null) {
    sb.append(line);
    sb.append('\n');
return sb.toString();
...

BufferedReader reader = new BufferedReader(new InputStreamReader(in, encoding));
StringBuilder result = new StringBuilder();
String line = reader.readLine();
int firstChar = (int) line.charAt(0);
if (firstChar == BOM_MARKER) {
    line = line.substring(1);
while (line != null) {
...

BufferedReader reader = new BufferedReader(new InputStreamReader(input));
StringBuffer buffer = new StringBuffer();
while (true) {
    String line;
    try {
        line = reader.readLine();
    } catch (IOException e) {
        throw new RuntimeException(e);
...