Java Utililty Methods File to String

List of utility methods to do File to String

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Description

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

Method

StringfileToString(File f)
Reads in a File and dumps it into a String. 
Scanner s = new Scanner(f);
StringBuilder sb = new StringBuilder();
while (s.hasNextLine()) {
    sb.append(s.nextLine() + '\n');
s.close();
return sb.toString();
StringfileToString(File f, String encoding)
Reads the contents of a file into a String. 
Scanner m = new Scanner(f, encoding);
String s = "";
while (m.hasNextLine())
    s += m.nextLine().trim() + "\n";
m.close();
return s.trim();
StringfileToString(File file)
Read in the contents of a file and return it as a String. 
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
FileInputStream fileInputStream = new FileInputStream(file);
try {
    writeInputStreamToOutputStream(fileInputStream, byteArrayOutputStream);
} finally {
    try {
        fileInputStream.close();
    } catch (Throwable ignore) {
...
StringfileToString(File file)
file To String 
FileInputStream fis = null;
String str = "";
try {
    fis = new FileInputStream(file);
    int content;
    while ((content = fis.read()) != -1) {
        str += (char) content;
    return str;
} catch (IOException e) {
    e.printStackTrace();
} finally {
    try {
        if (fis != null)
            fis.close();
    } catch (IOException ex) {
        ex.printStackTrace();
return str;
StringfileToString(File file)
file To String 
BufferedReader reader = new BufferedReader(new FileReader(file));
StringWriter writer = new StringWriter();
char[] c = new char[2048];
int bytesRead;
while ((bytesRead = reader.read(c, 0, c.length)) != -1)
    writer.write(c, 0, bytesRead);
writer.close();
reader.close();
...
StringfileToString(File file)
Reads the entire file content. 
return inputStreamToString(new FileInputStream(file));
StringfileToString(File file)
Reads a complete text file. 
try {
    return new Scanner(file).useDelimiter("\\Z").next();
} catch (FileNotFoundException e) {
    throw new RuntimeException("Failed to read file: " + file, e);
StringfileToString(File file)
file To String 
StringBuilder sb = new StringBuilder();
try (BufferedInputStream inputStream = new BufferedInputStream(new FileInputStream(file))) {
    for (int b; (b = inputStream.read()) != -1;) {
        String s = Integer.toHexString(b).toUpperCase();
        if (s.length() == 1) {
            sb.append('0');
        sb.append(s).append(' ');
...
CollectionfileToString(File file)
Reads a File and places the contents into a collection of Strings. 
BufferedReader br;
try {
    br = new BufferedReader(new FileReader(file));
} catch (FileNotFoundException fnfe) {
    return null;
String line;
try {
...
StringfileToString(File file)
Reads a given file and stores its contents into a String 
FileReader fr = new FileReader(file);
BufferedReader br = new BufferedReader(fr);
StringBuilder result = new StringBuilder();
String line = br.readLine();
while (line != null) {
    result.append(line + "\n");
    line = br.readLine();
fr.close();
br.close();
return result.toString();