Example usage for java.io FileWriter FileWriter

Introduction

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

Prototype

public FileWriter(FileDescriptor fd)

Source Link

Document

Constructs a FileWriter given a file descriptor, using the platform's java.nio.charset.Charset#defaultCharset() default charset .

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    BufferedReader br = new BufferedReader(new FileReader("in.txt"));
    BufferedWriter bw = new BufferedWriter(new FileWriter("out.txt"));
    int i;//from  w  w  w . j  a va  2  s  .  c o  m
    do {
        i = br.read();
        if (i != -1) {
            if (Character.isLowerCase((char) i))
                bw.write(Character.toUpperCase((char) i));
            else if (Character.isUpperCase((char) i))
                bw.write(Character.toLowerCase((char) i));
            else
                bw.write((char) i);
        }
    } while (i != -1);
    br.close();
    bw.close();
}

From source file:TabFilter.java

public static void main(String args[]) throws Exception {
    FileReader fr = new FileReader(args[0]);
    BufferedReader br = new BufferedReader(fr);

    FileWriter fw = new FileWriter(args[1]);
    BufferedWriter bw = new BufferedWriter(fw);

    // Convert tab to space characters
    String s;/*from  w  w  w .j  av  a  2 s.  co m*/
    while ((s = br.readLine()) != null) {
        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);
            if (c == '\t')
                c = ' ';
            bw.write(c);
        }
    }

    bw.flush();
    fr.close();
    fw.close();
}

From source file:AuthorizedFileWriter.java

public static void main(String[] args) {
    System.setSecurityManager(new SecurityManager());
    String file = "authorized.txt";
    String fileBody = "test";
    try {/*from w  w w  .  j av  a2  s.c o  m*/
        FileWriter fileWriter = new FileWriter(file);
        fileWriter.write(fileBody);
        fileWriter.close();
        System.exit(0);
    } catch (IOException ioException) {
        ioException.printStackTrace();
        System.exit(1);
    }
}

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 w w.  jav a  2  s.com

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

    Scanner src = new Scanner(fin);

    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);
}

From source file:Random4.java

public static void main(String[] argv) throws IOException {
    // java.util.Random methods are non-static, do need to construct Math
    Random r = new Random();
    PrintWriter file1 = new PrintWriter(new FileWriter("file1"));
    PrintWriter file2 = new PrintWriter(new FileWriter("file2"));
    for (int i = 0; i < 10000; i++) {
        file1.println(r.nextDouble());//from  w w w  . jav  a2  s  .  c  om
        file2.println(r.nextGaussian());
    }
    file1.close();
    file2.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    URL url = new URL("http://www.google.com");

    BufferedReader reader = new BufferedReader(new InputStreamReader(url.openStream()));
    BufferedWriter writer = new BufferedWriter(new FileWriter("data.html"));

    String line;/*ww w.  j av  a2  s  .co  m*/
    while ((line = reader.readLine()) != null) {
        System.out.println(line);
        writer.write(line);
        writer.newLine();
    }

    reader.close();
    writer.close();
}

From source file:MainClass.java

public static void main(String args[]) throws IOException {
    int i;/*w  w w. j a v a 2s  . c om*/
    double d;
    boolean b;
    String str;

    FileWriter fout = new FileWriter("test.txt");
    fout.write("string true false 1 2 3 4.12");
    fout.close();

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

    Scanner src = new Scanner(fin);

    while (src.hasNext()) {
        if (src.hasNextInt()) {
            i = src.nextInt();
            System.out.println("int: " + i);
        } else if (src.hasNextDouble()) {
            d = src.nextDouble();
            System.out.println("double: " + d);
        } else if (src.hasNextBoolean()) {
            b = src.nextBoolean();
            System.out.println("boolean: " + b);
        } else {
            str = src.next();
            System.out.println("String: " + str);
        }
    }

    fin.close();
}

From source file:MainClass.java

License:asdf

public static void main(String[] args) throws IOException {
    try {//from w w w .ja  va2  s .com
        BufferedReader in4 = new BufferedReader(new StringReader("asdf"));
        PrintWriter out1 = new PrintWriter(new BufferedWriter(new FileWriter("IODemo.out")));
        int lineCount = 1;
        String s = null;
        while ((s = in4.readLine()) != null)
            out1.println(lineCount++ + ": " + s);
        out1.close();
    } catch (EOFException e) {
        System.err.println("End of stream");
    }

}

From source file:MainClass.java

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

    int i;//  w  w w .  j a va 2  s. com
    double d;
    boolean b;
    String str;

    FileWriter fout = new FileWriter("test.txt");
    fout.write("Testing Scanner 10 12.2 one true two false");
    fout.close();

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

    Scanner src = new Scanner(fin);

    while (src.hasNext()) {
        if (src.hasNextInt()) {
            i = src.nextInt();
            System.out.println("int: " + i);
        } else if (src.hasNextDouble()) {
            d = src.nextDouble();
            System.out.println("double: " + d);
        } else if (src.hasNextBoolean()) {
            b = src.nextBoolean();
            System.out.println("boolean: " + b);
        } else {
            str = src.next();
            System.out.println("String: " + str);
        }
    }

    fin.close();
}

From source file:CursorWriter.java

public static void main(String[] args) throws Exception {
    String fileName = "yourXML.xml";
    XMLOutputFactory xof = XMLOutputFactory.newInstance();
    XMLStreamWriter xtw = null;//w  w w.  j  av a  2s  .  c o m
    xtw = xof.createXMLStreamWriter(new FileWriter(fileName));
    xtw.writeComment("all elements here are explicitly in the HTML namespace");
    xtw.writeStartDocument("utf-8", "1.0");
    xtw.setPrefix("html", "http://www.w3.org/TR/REC-html40");
    xtw.writeStartElement("http://www.w3.org/TR/REC-html40", "html");
    xtw.writeNamespace("html", "http://www.w3.org/TR/REC-html40");
    xtw.writeStartElement("http://www.w3.org/TR/REC-html40", "head");
    xtw.writeStartElement("http://www.w3.org/TR/REC-html40", "title");
    xtw.writeCharacters("character");
    xtw.writeEndElement();
    xtw.writeEndElement();
    xtw.writeStartElement("http://www.w3.org/TR/REC-html40", "body");
    xtw.writeStartElement("http://www.w3.org/TR/REC-html40", "p");
    xtw.writeCharacters("another character");
    xtw.writeStartElement("http://www.w3.org/TR/REC-html40", "a");
    xtw.writeAttribute("href", "http://www.java2s.com");
    xtw.writeCharacters("here");
    xtw.writeEndElement();
    xtw.writeEndElement();
    xtw.writeEndElement();
    xtw.writeEndElement();
    xtw.writeEndDocument();
    xtw.flush();
    xtw.close();
    System.out.println("Done");
}