Java Utililty Methods BufferedReader Read

try {
    BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(file), "UTF-8"));
    String s = "";
    while (true) {
        String s1 = reader.readLine();
        if (s1 == null)
            break;
        s += s1;
...

if (pFile == null || !pFile.canRead())
    return null;
FileReader in = null;
BufferedReader buf = null;
StringBuffer lString = new StringBuffer();
try {
    in = new FileReader(pFile);
    buf = new BufferedReader(in);
...

assert map != null;
assert source != null;
BufferedReader reader = new BufferedReader(source);
String line;
while ((line = reader.readLine()) != null) {
    String[] items = line.split("=", 2);
    String key = items[0].trim();
    String value = null;
...

InputStream stream = ClassLoader.getSystemClassLoader().getResourceAsStream(path + file);
BufferedReader reader = new BufferedReader(new InputStreamReader(stream));
StringBuilder builder = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
    builder.append(line);
reader.close();
...

StringBuilder sb = new StringBuilder();
String line;
try (BufferedReader br = new BufferedReader(new FileReader(filename))) {
    while ((line = br.readLine()) != null) {
        sb.append(line);
        sb.append(System.lineSeparator());
} catch (IOException e) {
...

ArrayList<String> r = new ArrayList<>();
try {
    BufferedReader reader = new BufferedReader(new FileReader(filename));
    String t;
    while ((t = reader.readLine()) != null) {
        r.add(t);
} catch (IOException E) {
...

InputStream is = null;
String ret = "";
if (f.exists()) {
    BufferedReader br = null;
    try {
        String line;
        is = new FileInputStream(f);
        InputStreamReader read = new InputStreamReader(is, "utf-8");
...

if (in == null) {
    throw new Exception("API key not found. Copy it to /src/test/resource/apiKey and try again.");
try (final BufferedReader br = new BufferedReader(new InputStreamReader(in, "UTF-8"))) {
    return br.readLine();

try {
    File file = new File(fileName);
    if (!file.exists())
        return null;
    BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
    StringBuffer buffer = new StringBuffer();
    String line = null;
    while ((line = in.readLine()) != null) {
...

if (null != findObject(rdr, type)) {
    return readBase64Object(rdr, type);
} else {
    return null;