Example usage for java.io FileReader FileReader

Introduction

In this page you can find the example usage for java.io FileReader FileReader.

Prototype

public FileReader(FileDescriptor fd)

Source Link

Document

Creates a new FileReader , given the FileDescriptor to read, using the platform's java.nio.charset.Charset#defaultCharset() default charset .

Usage

From source file:MainClass.java

public static void main(String args[]) {

    try {// w  ww  . j a  va  2  s . c  o  m
        FileReader fr = new FileReader(args[0]);

        BufferedReader br = new BufferedReader(fr);

        StreamTokenizer st = new StreamTokenizer(br);

        // Consider end-of-line as a token
        st.eolIsSignificant(true);

        // Declare variable to count lines
        int lines = 1;

        // Process tokens
        while (st.nextToken() != StreamTokenizer.TT_EOF) {
            switch (st.ttype) {
            case StreamTokenizer.TT_EOL:
                ++lines;
            }
        }

        System.out.println("There are " + lines + " lines");

        fr.close();
    } catch (Exception e) {
        System.out.println("Exception: " + e);
    }
}

From source file:Main.java

public static void main(String[] args) throws IOException {

    char[] cbuf = new char[5];

    // create new reader
    FileReader fr = new FileReader("C:/test.txt");
    LineNumberReader lnr = new LineNumberReader(fr);

    // read characters into the buffer
    int i = lnr.read(cbuf, 2, 3);
    System.out.println("Number of char read: " + i);

    // for each character in the buffer
    for (char c : cbuf) {
        // if char is empty
        if ((int) c == 0)
            c = '-';

        // prints char
        System.out.print(c);/*from ww  w.  j  a v  a2  s .c o  m*/
    }
    lnr.close();
}

From source file:Unbuffered.java

public static void main(String args[]) {
    Reader reader;/*from  www.  ja  v a 2s  .c o m*/
    int ch;
    System.out.println("Start! " + new Date());
    try {
        reader = new FileReader(args[0]);
        while ((ch = reader.read()) != -1) {
            // read entire file
        }
    } catch (IOException io) {
        System.err.println(io);
        System.exit(-1);
    }
    System.out.println("Stop! " + new Date());
}

From source file:Main.java

public static void main(String[] arguments) throws Exception {
    StringBuffer output = new StringBuffer();

    FileReader file = new FileReader("a.htm");
    BufferedReader buff = new BufferedReader(file);
    boolean eof = false;
    while (!eof) {
        String line = buff.readLine();
        if (line == null)
            eof = true;//from   w  ww. ja v a  2  s.c  o m
        else
            output.append(line + "\n");
    }
    buff.close();

    String page = output.toString();
    Pattern pattern = Pattern.compile("<a.+href=\"(.+?)\"");
    Matcher matcher = pattern.matcher(page);
    while (matcher.find()) {
        System.out.println(matcher.group(1));
    }
}

From source file:MainClass.java

public static void main(String args[]) {

    try {//from  ww w . j ava 2  s .  com

        // Create a file reader
        FileReader fr = new FileReader(args[0]);

        // Create a buffered reader
        BufferedReader br = new BufferedReader(fr);

        // Create a stream tokenizer
        StreamTokenizer st = new StreamTokenizer(br);

        // Process tokens
        while (st.nextToken() != StreamTokenizer.TT_EOF) {
            switch (st.ttype) {
            case StreamTokenizer.TT_WORD:
                System.out.println(st.lineno() + ") " + st.sval);
                break;
            case StreamTokenizer.TT_NUMBER:
                System.out.println(st.lineno() + ") " + st.nval);
                break;
            default:
                System.out.println(st.lineno() + ") " + (char) st.ttype);
            }
        }

        // Close file reader
        fr.close();
    } catch (Exception e) {
        System.out.println("Exception: " + e);
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    BufferedReader br = new BufferedReader(new FileReader("ravi.txt"));
    while (true) {
        String line = br.readLine();
        if (line == null)
            break;
        if (!UCODE_PATTERN.matcher(line).matches()) {
            System.err.println("Bad input: " + line);
        } else {//  w  w  w  . j a  v a2  s .co  m
            String hex = line.substring(2, 6);
            int number = Integer.parseInt(hex, 16);
            System.out.println(hex + " -> " + ((char) number));
        }
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    XMLInputFactory factory = XMLInputFactory.newInstance();
    XMLStreamReader sr = factory.createXMLStreamReader(new FileReader("test.xml"));
    System.out.println(sr.getClass());

    while (sr.hasNext()) {
        int eventType = sr.next();

        if (eventType == XMLStreamReader.START_DOCUMENT) {
            continue;
        } else if (eventType == XMLStreamReader.END_ELEMENT) {
            System.out.println("End Element:    " + sr.getLocalName());
        } else if (eventType == XMLStreamReader.START_ELEMENT) {
            System.out.println("Start Element:  " + sr.getLocalName());
        }/*from  ww w .j  av a  2s. co m*/
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    String filename = "infile.txt";
    String patternStr = "pattern";
    BufferedReader rd = new BufferedReader(new FileReader(filename));

    Pattern pattern = Pattern.compile(patternStr);
    Matcher matcher = pattern.matcher("\\D");

    String line = null;//from   w  ww . ja  v  a 2 s. c o  m
    while ((line = rd.readLine()) != null) {
        matcher.reset(line);
        if (matcher.find()) {
            // line matches the pattern
        }
    }
}

From source file:Main.java

public static void main(String[] args) {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("js");
    try {/*  w w w.ja v  a2s  .  c o  m*/
        FileReader reader = new FileReader("yourFile.js");
        engine.eval(reader);
        reader.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:Main.java

public static void main(String args[]) throws Exception {
    XMLInputFactory xmlif = XMLInputFactory.newInstance();
    XMLEventReader xmler = xmlif.createXMLEventReader(new FileReader("yourFile.xml"));
    XMLEvent event;// w w w .  ja va2s.c om
    while (xmler.hasNext()) {
        event = xmler.nextEvent();
        if (event.isStartElement()) {
            System.out.println(event.asStartElement().getName());
        } else if (event.isCharacters()) {
            System.out.println(event.asCharacters().getData());
        }
    }
}