Java Utililty Methods DataInputStream Read

List of utility methods to do DataInputStream Read

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Description

The list of methods to do DataInputStream Read are organized into topic(s).

Method

longloadChecksum(Bundle b, BundleContext bc)
Returns the stored checksum of the bundle. 
String key = getBundleKey(b);
File f = bc.getDataFile(key + CHECKSUM_SUFFIX);
DataInputStream in = null;
try {
    in = new DataInputStream(new FileInputStream(f));
    return in.readLong();
} catch (Exception e) {
    return Long.MIN_VALUE;
...
float[][]loadColorTable(final File file)
Loads the color table from the given file. 
if (file == null || !file.exists())
    return null;
final long fileLen = file.length();
if (fileLen > Integer.MAX_VALUE)
    return null;
final int offset = (int) fileLen - LUT_LEN;
if (offset < 0)
    return null;
...
int[]loadIntArrayFromFile(File file)
load Int Array From File 
if (!file.exists()) {
    return null;
int size = (int) (file.length() / 4l);
DataInputStream dis = null;
try {
    dis = new DataInputStream(new FileInputStream(file));
    int[] array = new int[size];
...
StringreadBytes(DataInputStream dataStream, int numberOfBytes)
read Bytes 
String temp = "";
for (int i = 0; i < numberOfBytes; i++) {
    char c = (char) dataStream.readByte();
    temp += c;
return temp;
byte[]readBytes(DataInputStream input, int size)
Reads exact amount of bytes 
if (input == null)
    return null;
byte bytes[] = new byte[size];
int numRead = 0;
while (numRead < size) {
    int ret = input.read(bytes, numRead, size - numRead);
    if (ret < 0)
        throw new IOException("EOF");
...
byte[]readBytes(DataInputStream stream, int size)
read Bytes 
byte[] buf = new byte[size];
int toRead = size;
int done = 0;
while (toRead > 0) {
    int read = stream.read(buf, done, toRead);
    if (read == -1) {
        throw new IOException();
    done += read;
    toRead -= read;
return buf;
byte[]readBytes(DataInputStream stream, int size)
Read a number of bytes or throw. 
byte[] buf = new byte[size];
int toRead = size;
int done = 0;
while (toRead > 0) {
    int read = stream.read(buf, done, toRead);
    if (read == -1) {
        throw new IOException();
    done += read;
    toRead -= read;
return buf;
byte[]readBytes(File ff)
read Bytes 
byte b[] = new byte[(int) ff.length()];
DataInputStream din = new DataInputStream(new FileInputStream(ff));
try {
    din.readFully(b);
} finally {
    din.close();
return b;
...
byte[]readBytes(String filename)
read Bytes 
File file = new File(filename);
FileInputStream fileInputStream = new FileInputStream(file);
DataInputStream dataInputStream = new DataInputStream(fileInputStream);
try {
    byte[] keyBytes = new byte[(int) file.length()];
    dataInputStream.readFully(keyBytes);
    return keyBytes;
} finally {
...
byte[]readBytes(String filename)
read Bytes 
File fileTxt = new File(filename);
if (!fileTxt.exists()) {
    System.out.println("Erro ao abrir arquivo:\n" + fileTxt.getAbsolutePath());
    return null;
try {
    int size = (int) fileTxt.length();
    byte[] bytes = new byte[size];
...