Java Utililty Methods Text File Read

List of utility methods to do Text File Read

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Description

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

Method

StringreadFile(String filePath)
read File 
return readFile(filePath, true);
StringreadFile(String path)
read File 
StringBuilder result = new StringBuilder();
BufferedReader reader = null;
try {
    reader = new BufferedReader(new FileReader(path));
    String buffer;
    while ((buffer = reader.readLine()) != null) {
        result.append(buffer + '\n');
    reader.close();
} catch (IOException e) {
    try {
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        JOptionPane.showMessageDialog(null, "<html><br>Could not read from file: " + path + "<br>"
                + "Error: " + e.toString() + "</html>", "Error!", JOptionPane.ERROR_MESSAGE);
    } catch (Exception ee) {
    e.printStackTrace();
return result.toString();
StringreadTextFile(File file, int max, String ellipsis)
Read a text file into a String, optionally limiting the length. 
InputStream input = new FileInputStream(file);
try {
    if (max > 0) { 
        byte[] data = new byte[max + 1];
        int length = input.read(data);
        if (length <= 0)
            return "";
        if (length <= max)
...
StringreadTextFile(final DataInputStream is)
Read file as text file return as US-ASCII string 
byte[] dataBuf = new byte[is.available()];
is.readFully(dataBuf);
return new String(dataBuf, "US-ASCII");
StringreadTextFile(final String path, final String enc)
read Text File 
ByteArrayOutputStream os = new ByteArrayOutputStream();
try {
    File f = new File(path);
    if (f.exists()) {
        FileInputStream is = new FileInputStream(path);
        try {
            copyStream(is, os);
        } finally {
...
StringreadTextFile(InputStream inStream)
read Text File 
String content = "";
try {
    int ca = inStream.available();
    byte[] by = new byte[ca];
    inStream.read(by);
    content = new String(by, encoding);
    inStream.close();
} catch (FileNotFoundException e) {
...
StringreadTextFile(String fileName)
read Text File 
File file = new File(fileName);
FileInputStream fis = new FileInputStream(file);
byte[] data = new byte[(int) file.length()];
fis.read(data);
fis.close();
return new String(data, "UTF-8");
StringreadTextFile(String fn)
read Text File 
FileInputStream fis = new FileInputStream(fn);
int numBytes = fis.available();
byte[] buf = new byte[numBytes];
fis.read(buf);
String content = new String(buf);
return content;
StringreadTextFileFast(final File file)
read Text File Fast 
try {
    return new String(readCloseBinaryStream(new FileInputStream(file)));
} catch (FileNotFoundException e) {
    System.err.println("readTextFileFast: File " + file + " not found.");
return "";