Java Utililty Methods FileReader Read

try {
    FileReader f = new FileReader(filename);
    char[] buf = new char[10 * 1024];
    StringBuffer s = new StringBuffer();
    int hasread = f.read(buf);
    while (hasread != -1) {
        s.append(buf, 0, hasread);
        hasread = f.read(buf);
...

File file = new File(fileName);
Gson gson = new Gson();
try (FileReader rdr = new FileReader(file)) {
    return gson.fromJson(rdr, klass);

return loadIndex(root_, "index");

return loadJSON(new FileReader(file));

ArrayList<String> kegg = new ArrayList<String>();
String fileName = location + species + "_kegg_edges.txt";
try {
    FileReader fr = new FileReader(fileName);
    LineNumberReader lnr = new LineNumberReader(fr);
    String s = null;
    while ((s = lnr.readLine()) != null) {
        s = s.trim();
...

final char[] buffer = new char[8192];
int bufferLength = 0;
StringBuffer textBuffer = new StringBuffer();
Reader reader = new FileReader(f);
while (bufferLength != -1) {
    bufferLength = reader.read(buffer);
    if (bufferLength > 0) {
        textBuffer.append(new String(buffer, 0, bufferLength));
...

long n = f.length();
char[] cbuf = new char[(int) n];
FileReader fr = new FileReader(f);
fr.read(cbuf);
fr.close();
return (new String(cbuf));

Reader in = new FileReader(file);
StringBuilder buffer = new StringBuilder();
int i;
while ((i = in.read()) != -1)
    buffer.append((char) i);
in.close();
return buffer.toString();

Reader reader;
try {
    reader = new FileReader(file.getAbsolutePath());
} catch (FileNotFoundException e) {
    throw new Exception("Couldn't create reader", e);
String text = "";
try {
...

Reader reader = new FileReader(file);
try {
    StringBuilder sb = new StringBuilder();
    char[] buffer = new char[512];
    int n;
    while ((n = reader.read(buffer)) != -1)
        sb.append(buffer, 0, n);
    return sb.toString();
...