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:InputOutputDemo.java

public static void main(String[] a) throws Exception {
    PrintWriter pwr = new PrintWriter(new FileWriter("java2s.txt"));
    pwr.print(4711);/* w w w  . j a  v  a  2 s  .  c o m*/
    pwr.print(' ');
    pwr.print("Java Source and Support at www.java2s.com");
    pwr.close();

    StreamTokenizer stok = new StreamTokenizer(new FileReader("java2s.txt"));
    int tok = stok.nextToken();
    while (tok != StreamTokenizer.TT_EOF) {
        System.out.println(stok.sval);
        tok = stok.nextToken();
    }
}

From source file:Main.java

public static void main(String args[]) throws Exception {
    String s = "<xmltag atr=value>tag data</xmltag>";
    FileWriter fr = new FileWriter(new File("a.txt"));
    Writer br = new BufferedWriter(fr);
    br.write(s);//w ww  .j a va2  s  .  c  om
    br.close();
}

From source file:FileReaderWriterExample.java

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

    Reader r = new FileReader("in.txt");
    Writer w = new FileWriter("out.txt");
    int c;//from  w  ww  .jav  a 2s.c  o m
    while ((c = r.read()) != -1) {
        System.out.print((char) c);
        w.write(c);
    }
    r.close();
    w.close();
}

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("2 3.4 5 6 7.4 9.1 10.5 done");
    fout.close();/*www  . j av a 2s . co  m*/

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

    Scanner src = new Scanner(fin);

    // Read and sum numbers.
    while (src.hasNext()) {
        if (src.hasNextDouble()) {
            System.out.println(src.nextDouble());
        } else {
            break;
        }
    }
    fin.close();
}

From source file:MainClass.java

public static void main(String args[]) {

    try {//from   w ww  .  ja v a2s  . com

        FileReader fr = new FileReader(args[0]);

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

        int i;
        while ((i = fr.read()) != -1) {
            fw.write(i);
        }
        fw.close();

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

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  va  2  s. c om

    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

License:asdf

public static void main(String[] argv) throws Exception {
    File temp = File.createTempFile("pattern", ".dat");

    temp.deleteOnExit();//from www. j  ava2 s  . c om

    BufferedWriter out = new BufferedWriter(new FileWriter(temp));
    out.write("asdf");
    out.close();
}

From source file:Main.java

public static void main(String args[]) throws IOException {
    String source = "test";
    char buffer[] = new char[source.length()];
    source.getChars(0, source.length(), buffer, 0);

    FileWriter f0 = new FileWriter("file1.txt");
    for (int i = 0; i < buffer.length; i += 2) {
        f0.write(buffer[i]);/*from  ww w. j a  v  a 2  s . co m*/
    }
    f0.close();

    FileWriter f1 = new FileWriter("file2.txt");
    f1.write(buffer);
    f1.close();

    FileWriter f2 = new FileWriter("file3.txt");

    f2.write(buffer, buffer.length - buffer.length / 4, buffer.length / 4);
    f2.close();
}

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();/*w  w  w .j a  va 2 s . com*/

    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);
}

From source file:ScanMixed.java

public static void main(String args[]) throws IOException {
    int i;//from w  w  w. j  av  a 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();
}