Java Utililty Methods File to InputStream

List of utility methods to do File to InputStream

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Description

The list of methods to do File to InputStream are organized into topic(s).

Method

FileInputStreamnewInputStream(File file)
new Input Stream 
try {
    return new FileInputStream(file);
} catch (Exception e) {
    e.printStackTrace();
    return null;
InputStreamnewInputStream(File file)
new Input Stream 
try {
    return new BufferedInputStream(new FileInputStream(file));
} catch (IOException e) {
    throw new RuntimeException(e);
FileInputStreamopenInputStream(File file)
open Input Stream 
FileInputStream stream = new FileInputStream(file);
return stream;
FileInputStreamopenInputStream(File file)
open Input Stream 
if (file.exists()) {
    if (file.isDirectory()) {
        throw new IOException("File '" + file + "' exists but is a directory");
    if (file.canRead() == false) {
        throw new IOException("File '" + file + "' cannot be read");
} else {
...
FileInputStreamopenInputStream(File file)
Opens a FileInputStream for the specified file, providing better error messages than simply calling new FileInputStream(file). 
if (file.exists()) {
    if (file.isDirectory()) {
        throw new IOException("File '" + file + "' exists but is a directory");
    if (file.canRead() == false) {
        throw new IOException("File '" + file + "' cannot be read");
} else {
...
FileInputStreamopenInputStream(File file)
Open InputStream for a file. 
if (file.exists()) {
    if (file.isDirectory()) {
        throw new IOException("File '" + file + "' exists but is a directory");
    if (!file.canRead()) {
        throw new IOException("File '" + file + "' cannot be read");
    } else {
        return new FileInputStream(file);
...
InputStreamopenInputStream(File file, boolean buffer)
Opens an InputStream on a file for reading. 
return openInputStream(file, buffer, BUFFER_SIZE);
FileInputStreamopenInputStream(File file, boolean refuseEmpty)
open Input Stream 
if (file != null && file.exists() && refuseEmpty && file.length() == 0)
    throw new IllegalArgumentException("File \"" + file.getAbsolutePath() + "\" is empty!");
return new FileInputStream(file);
FileInputStreamopenInputStream(String filePath)
open Input Stream 
return openInputStream(new File(filePath));
FileInputStreamopenInputStream(String infilename)
open Input Stream 
FileInputStream fis = null;
try {
    fis = new FileInputStream(infilename);
} catch (IOException ioe) {
    System.out.println(ioe.getMessage());
return fis;