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[]) throws IOException {
    // Write output to a file.
    FileWriter fout = new FileWriter("test.txt");
    fout.write("int: 1  double 1.0  boolean true");
    fout.close();/*  w  w w . ja v  a 2s.  c o  m*/

    FileReader fin = new FileReader("Test.txt");

    Scanner src = new Scanner(fin);

    while (src.hasNext()) {
        if (src.hasNextInt()) {
            System.out.println("int: " + src.nextInt());
        } else if (src.hasNextDouble()) {
            System.out.println("double: " + src.nextDouble());
        } else if (src.hasNextBoolean()) {
            System.out.println("boolean: " + src.nextBoolean());
        } else {
            System.out.println(src.next());
        }
    }
    fin.close();
}

From source file:Main.java

public static void main(String[] args) {
    try {//from w  w  w. ja  va2 s.  c  o m
        BufferedReader input = new BufferedReader(new FileReader(args[0]));
        ArrayList list = new ArrayList();
        String line;
        while ((line = input.readLine()) != null) {
            list.add(line);
        }
        input.close();

        Collections.reverse(list);

        PrintWriter output = new PrintWriter(new BufferedWriter(new FileWriter(args[1])));
        for (Iterator i = list.iterator(); i.hasNext();) {
            output.println((String) i.next());
        }
        output.close();
    } catch (IOException e) {
        System.err.println(e);
    }
}

From source file:Main.java

public static void main(String args[]) throws Exception {
    File file = new File(".");

    if (file.isDirectory()) {
        String[] files = file.list();
        for (int i = 0; i < files.length; i++)
            System.out.println(files[i]);
    } else {/*from w  w w . j a v  a2s. c  o  m*/
        FileReader fr = new FileReader(file);
        BufferedReader in = new BufferedReader(fr);
        String line;
        while ((line = in.readLine()) != null)
            System.out.println(line);
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Socket sock = new Socket(args[0], Integer.parseInt(args[1]));
    GZIPOutputStream zip = new GZIPOutputStream(sock.getOutputStream());
    String line;//from   w w w .  j  a  va  2  s .  com
    BufferedReader bis = new BufferedReader(new FileReader(args[2]));
    while (true) {
        line = bis.readLine();
        if (line == null)
            break;
        line = line + "\n";
        zip.write(line.getBytes(), 0, line.length());
    }
    zip.finish();
    zip.close();
    sock.close();
}

From source file:MainClass.java

public static void main(String args[]) throws IOException {
    Hashtable map = new Hashtable();
    FileReader fr = new FileReader(args[0]);
    BufferedReader br = new BufferedReader(fr);
    String line;/*w  w  w.ja  va  2 s  . com*/
    while ((line = br.readLine()) != null) {
        processLine(line, map);
    }
    Enumeration e = map.keys();
    while (e.hasMoreElements()) {
        String key = (String) e.nextElement();
        System.out.println(key + " : " + map.get(key));
    }
}

From source file:WordCount.java

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

    Hashtable map = new Hashtable();
    FileReader fr = new FileReader(args[0]);
    BufferedReader br = new BufferedReader(fr);
    String line;/*  w ww . j  av a2 s  . c om*/
    while ((line = br.readLine()) != null) {
        processLine(line, map);
    }
    Enumeration e = map.keys();
    while (e.hasMoreElements()) {
        String key = (String) e.nextElement();
        System.out.println(key + " : " + map.get(key));
    }
}

From source file:GetSeriesId.java

public static void main(String[] args) throws Exception {
    XPathFactory factory = XPathFactory.newInstance();
    XPath xPath = factory.newXPath();

    Double result = (Double) xPath.evaluate("/schedule/@seriesId", new InputSource(new FileReader("tds.xml")),
            XPathConstants.NUMBER);
    System.out.println(result.intValue());
}

From source file:AllCapsDemo.java

License:asdf

public static void main(String[] arguments) {
    String sourceName = "asdf";
    try {//from  ww w .  jav  a 2s  .  co  m
        File source = new File(sourceName);
        File temp = new File("cap" + sourceName + ".tmp");

        FileReader fr = new FileReader(source);
        BufferedReader in = new BufferedReader(fr);

        FileWriter fw = new FileWriter(temp);
        BufferedWriter out = new BufferedWriter(fw);

        boolean eof = false;
        int inChar = 0;
        do {
            inChar = in.read();
            if (inChar != -1) {
                char outChar = Character.toUpperCase((char) inChar);
                out.write(outChar);
            } else
                eof = true;
        } while (!eof);
        in.close();
        out.close();

        boolean deleted = source.delete();
        if (deleted)
            temp.renameTo(source);
    } catch (Exception se) {
        System.out.println("Error - " + se.toString());
    }
}

From source file:GuestListCounter.java

public static void main(String[] args) throws Exception {
    XPathFactory factory = XPathFactory.newInstance();
    XPath xPath = factory.newXPath();

    Number shows = (Number) xPath.evaluate("count(/schedule/show)", new InputSource(new FileReader("tds.xml")),
            XPathConstants.NUMBER);
    System.out.println("Document has " + shows.intValue() + " shows.");
}

From source file:MainClass.java

public static void main(String args[]) throws IOException {
    int count = 0;
    double sum = 0.0;

    FileWriter fout = new FileWriter("test.txt");

    fout.write("2, 3.4,    5,6, 7.4, 9.1, 10.5, done");
    fout.close();/*from  w ww. j  a v a 2 s  . c om*/

    FileReader fin = new FileReader("Test.txt");

    Scanner src = new Scanner(fin);

    src.useDelimiter(", *");

    while (src.hasNext()) {
        if (src.hasNextDouble()) {
            sum += src.nextDouble();
            count++;
        } else {
            String str = src.next();
            if (str.equals("done"))
                break;
            else {
                System.out.println("File format error.");
                return;
            }
        }
    }

    fin.close();
    System.out.println("Average is " + sum / count);
}