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

StringfileAsString(File file)
reads a File as one single string. 
byte[] content = fileAsByteArray(file);
if (content == null)
    return "";
return new String(content);
StringfileAsString(String fileName)
Returns the contents of the specified file as a string. 
File f = null;
BufferedReader reader = null;
try {
    f = new File(fileName);
    reader = new BufferedReader(new FileReader(f));
    StringBuilder result = new StringBuilder(10000);
    String line = null;
    while ((line = reader.readLine()) != null) {
...
StringfileAsString(String filePath)
Read a file, putting its contents into a String. 
String retVal = null;
if (filePath == null) {
    return null;
try {
    FileInputStream fin = new FileInputStream(filePath);
    return fileAsString(fin);
} catch (Exception exc) {
...
StringfileContentsToString(File errFile)
Utility method to read in contents of file and concatenate into String 
String errFileString = null;
BufferedReader br = null;
StringBuffer sb = new StringBuffer();
br = new BufferedReader(new FileReader(errFile));
String errLine = br.readLine();
while (errLine != null) {
    sb.append(errLine);
    errLine = br.readLine();
...
StringfileContentsToString(String file)
Read the contents of a file and place them in a string object. 
String contents = "";
File f = new File(file);
if (f.exists()) {
    try {
        FileReader fr = new FileReader(f);
        char[] template = new char[(int) f.length()];
        fr.read(template);
        contents = new String(template);
...
char[]getChars(File file)
get Chars 
String str;
FileReader reader = new FileReader(file);
BufferedReader buffer = new BufferedReader(reader);
String line;
StringBuilder result = new StringBuilder();
while ((line = buffer.readLine()) != null) {
    result.append(line).append("\n");
str = result.toString();
buffer.close();
reader.close();
return str.toCharArray();
StringgetChars(Reader r)
Because this method takes a Reader it can be locale-correct by creating a FileReader (for example) that uses UTF-8 or some other charset. 
if (r == null) {
    throw new IllegalArgumentException("Reader cannot be null");
try (StringWriter sw = new StringWriter(10 * 1024)) {
    char[] c = new char[4096];
    while (true) {
        int read = r.read(c);
        if (read == -1) {
...
StringgetFileContentAsString(File cpfile)
get File Content As String 
FileReader in = null;
try {
    in = new FileReader(cpfile);
} catch (FileNotFoundException e1) {
    e1.printStackTrace();
char[] buffer = new char[128];
int len;
...
StringgetFileContentAsString(final String filePath)
reads file and concatenate content to a string 
final StringBuffer fileData = new StringBuffer(1000);
final BufferedReader reader = new BufferedReader(new FileReader(filePath));
char[] buf = new char[1024];
int numRead = 0;
while ((numRead = reader.read(buf)) != -1) {
    final String readData = String.valueOf(buf, 0, numRead);
    fileData.append(readData);
    buf = new char[1024];
...
StringgetFileContentAsString(InputStream inputStream)
Reads the content of a given file as a String and returns it. 
String data = "";
byte[] buffer = new byte[1024];
int numRead = -1;
while (true) {
    numRead = inputStream.read(buffer);
    if (numRead == 1024) {
        data += new String(buffer);
    } else {
...