Java Utililty Methods File to String

if (!file.exists() && file.canRead()) {
    throw new IllegalStateException("File " + file.getName() + " either does not exist or can not be read");
RandomAccessFile raf = new RandomAccessFile(file, "r");
if (raf.length() > max) {
    raf.close();
    throw new IllegalStateException("File " + file.getName() + " is to large (>" + max);
byte[] ba = new byte[(int) raf.length()];
raf.read(ba);
raf.close();
return new String(ba);

FileInputStream in = new FileInputStream(file);
try {
    return allToString(new InputStreamReader(in, charsetName));
} finally {
    in.close();

FileInputStream fileInputStream = null;
try {
    try {
        fileInputStream = new FileInputStream(file);
        return streamToString(fileInputStream, charsetName);
    } finally {
        if (fileInputStream != null) {
            fileInputStream.close();
...

String result[] = new String[files.length];
for (int i = 0; i < files.length; i++) {
    File file = files[i];
    result[i] = file.getAbsolutePath();
return result;

FileInputStream in = null;
int size = 0;
if (file.exists()) {
    in = new FileInputStream(file);
    size = (int) file.length();
try {
    int fRead = 0;
...

return streamToString(fileToStream(file), charsetName);

byte[] buffer = new byte[(int) new File(filePath).length()];
BufferedInputStream f = null;
try {
    f = new BufferedInputStream(new FileInputStream(filePath));
    f.read(buffer);
} finally {
    if (f != null) {
        f.close();
...

String style = "";
Scanner sc = new Scanner(file);
while (sc.hasNextLine()) {
    style += sc.nextLine() + "\n";
sc.close();
return style;

BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
return bufferedReader.lines().collect(Collectors.joining(System.lineSeparator()));

StringBuilder lines = new StringBuilder();
FileReader fileReader = null;
BufferedReader bufferedReader = null;
String line = null;
try {
    fileReader = new FileReader(file);
    bufferedReader = new BufferedReader(fileReader);
    while ((line = bufferedReader.readLine()) != null) {
...