Java Utililty Methods InputStreamReader Read

BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
try {
    StringBuilder ret = new StringBuilder();
    String line;
    while ((line = reader.readLine()) != null) {
        ret.append(line);
        ret.append("\n");
    return ret.toString();
} finally {
    reader.close();

return readFile(file, "UTF8");

Reader in = new FileReader(file);
StringWriter out = new StringWriter();
copy(in, out);
return out.toString();

List<String> lines = new ArrayList<String>();
BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
String line;
while ((line = reader.readLine()) != null) {
    lines.add(line);
reader.close();
return lines;
...

StringBuilder result = new StringBuilder();
BufferedReader in = null;
try {
    in = new BufferedReader(new InputStreamReader(new FileInputStream(file), ENCODING));
    String line;
    while ((line = in.readLine()) != null) {
        result.append(line);
        result.append("\n");
...

InputStream is = new FileInputStream(file);
if (file.getName().toLowerCase().endsWith(".gz"))
    is = new GZIPInputStream(is);
List<String> lines = new ArrayList<>();
try (BufferedReader reader = new BufferedReader(new InputStreamReader(is))) {
    String line = reader.readLine();
    while (line != null) {
        lines.add(line);
...

StringBuilder buffy = new StringBuilder();
BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(file), "UTF8"));
String str;
while ((str = in.readLine()) != null) {
    buffy.append(str).append("\n");
in.close();
return buffy.toString();
...

StringBuilder result = new StringBuilder();
BufferedReader reader = null;
try {
    reader = new BufferedReader(new FileReader(file));
    char[] buf = new char[1024];
    int r = 0;
    while ((r = reader.read(buf)) != -1) {
        result.append(buf, 0, r);
...

List<String> lines = new ArrayList<String>();
try {
    FileInputStream fstream = new FileInputStream(file);
    DataInputStream in = new DataInputStream(fstream);
    BufferedReader br = new BufferedReader(new InputStreamReader(in));
    String line;
    while ((line = br.readLine()) != null) {
        lines.add(line);
...

return readStream(new FileInputStream(file));