Java Utililty Methods FileInputStream Read

List of utility methods to do FileInputStream Read

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Description

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

Method

StringreadFile(String filename)
Reads the contents of the file with the given name, returning a String. 
StringBuffer sb = new StringBuffer(10000);
char[] cb = new char[10000]; 
int j = 0;
java.io.FileReader f = null;
try {
    f = new java.io.FileReader(filename);
    while (j != -1) {
        j = f.read(cb, 0, cb.length);
...
StringreadFile(File f)
read File 
byte[] baselineBuffer = new byte[(int) f.length()];
FileInputStream s = new FileInputStream(f);
s.read(baselineBuffer);
s.close();
return new String(baselineBuffer);
byte[]readFile(File f)
read File 
byte[] b = new byte[(int) f.length()];
DataInputStream in = new DataInputStream(new FileInputStream(f));
in.readFully(b);
in.close();
return b;
StringreadFile(File f)
Reads in the file's contents, skipping all line terminators (newlines or carriage returns). 
BufferedInputStream bis = null;
try {
    bis = new BufferedInputStream(new FileInputStream(f));
    StringBuilder buf = new StringBuilder((int) f.length());
    int c;
    while (true) {
        c = bis.read();
        if (c == -1)
...
byte[]readFile(File f)
read File 
DataInputStream in = new DataInputStream(new FileInputStream(f));
byte[] ret = new byte[(int) f.length()];
in.readFully(ret);
in.close();
return ret;
byte[]readFile(File f)
Utility method for reading a file, used for testing. 
byte[] content = new byte[0];
try (BufferedInputStream in = new BufferedInputStream(new FileInputStream(f));
        ByteArrayOutputStream out = new ByteArrayOutputStream()) {
    byte[] buffer = new byte[8192]; 
    int bytesRead;
    while ((bytesRead = in.read(buffer)) > 0) {
        out.write(buffer, 0, bytesRead);
    content = out.toByteArray();
} catch (IOException e) {
    e.printStackTrace();
return content;
byte[]readFile(File f)
read File 
int len = f.length() > Integer.MAX_VALUE ? 8192 : (int) f.length();
byte[] buf = new byte[len];
FileInputStream is = new FileInputStream(f);
try {
    ByteArrayOutputStream os = new ByteArrayOutputStream((int) f.length());
    int n = is.read(buf);
    while (n != -1) {
        os.write(buf, 0, n);
...
byte[]readFile(File f)
read File 
FileInputStream input = new FileInputStream(f);
byte[] fileBytes = readStream(input, true);
return fileBytes;
StringreadFile(File f)
read File 
try (FileInputStream fis = new FileInputStream(f)) {
    byte[] data = new byte[(int) f.length()];
    fis.read(data);
    return new String(data, "UTF-8");
StringreadFile(File f)
read File 
byte[] baselineBuffer = new byte[(int) f.length()];
new FileInputStream(f).read(baselineBuffer);
return new String(baselineBuffer);