Example usage for java.io FileOutputStream write

Introduction

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

Prototype

public void write(byte b[]) throws IOException

Source Link

Document

Writes b.length bytes from the specified byte array to this file output stream.

Usage

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    String password = "password";

    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
    keyPairGenerator.initialize(1024);//from w w w . j a v a2  s  .  com
    KeyPair keyPair = keyPairGenerator.genKeyPair();
    String publicKeyFilename = "public";

    byte[] publicKeyBytes = keyPair.getPublic().getEncoded();

    FileOutputStream fos = new FileOutputStream(publicKeyFilename);
    fos.write(publicKeyBytes);
    fos.close();

    String privateKeyFilename = "privateKeyFilename";

    byte[] privateKeyBytes = keyPair.getPrivate().getEncoded();

    byte[] encryptedPrivateKeyBytes = passwordEncrypt(password.toCharArray(), privateKeyBytes);

    fos = new FileOutputStream(privateKeyFilename);
    fos.write(encryptedPrivateKeyBytes);
    fos.close();
}

From source file:Main.java

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

    FileInputStream fin = new FileInputStream("a.dat");
    InflaterInputStream iis = new InflaterInputStream(fin);
    FileOutputStream fout = new FileOutputStream("b.dat");
    for (int c = iis.read(); c != -1; c = iis.read()) {
        fout.write(c);
    }//from   w ww .  j a  v  a2s .c o m
    fout.close();

}

From source file:CopyBytes.java

public static void main(String[] args) throws IOException {
    File inputFile = new File("input.txt");
    File outputFile = new File("output.txt");

    FileInputStream in = new FileInputStream(inputFile);
    FileOutputStream out = new FileOutputStream(outputFile);
    int c;/*from  w ww  .  ja v  a 2s.co  m*/

    while ((c = in.read()) != -1)
        out.write(c);

    in.close();
    out.close();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    String strFilePath = "C://demo.txt";
    FileOutputStream fos = new FileOutputStream(strFilePath);
    String strContent = "Write File using Java FileOutputStream example !";
    fos.write(strContent.getBytes());
    fos.close();/*from  w ww.  j  a  v  a2s.  c  o  m*/
}

From source file:Main.java

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

    FileOutputStream fos = new FileOutputStream("C://text.txt");

    fos.close();/*  www.java2s. c  o  m*/

    // try to write into underlying stream
    fos.write(65);
    fos.flush();
    fos.close();

}

From source file:Base64Decode.java

/**
  * A test method of questionable utility.
  *//* w  ww .j  av a  2 s  .co  m*/
public static void main(String args[]) {
    try {
        FileOutputStream fos = new FileOutputStream("out.dat");

        fos.write(decode(System.in));
        fos.close();
    } catch (IOException ie) {
        ie.printStackTrace();
    }
}

From source file:FileOutputStreamDemo.java

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

    FileOutputStream fos = new FileOutputStream(args[0]);

    // Write 12 bytes to the file
    for (int i = 0; i < 12; i++) {
        fos.write(i);
    }/*from w  ww.  j a v a2  s .  c  om*/

    // Close file output stream
    fos.close();
}

From source file:Hex.java

public static void main(String[] args) {
    if (args.length != 3) {
        System.out.println("Usage: HexStrToBin enc/dec <infileName> <outfilename>");
        System.exit(1);// w w w .  j a  v  a 2  s.  c o  m
    }
    try {
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        InputStream in = new FileInputStream(args[1]);
        int len = 0;
        byte buf[] = new byte[1024];
        while ((len = in.read(buf)) > 0)
            os.write(buf, 0, len);
        in.close();
        os.close();

        byte[] data = null;
        if (args[0].equals("dec"))
            data = decode(os.toString());
        else {
            String strData = encode(os.toByteArray());
            data = strData.getBytes();
        }

        FileOutputStream fos = new FileOutputStream(args[2]);
        fos.write(data);
        fos.close();
    } catch (Exception e) {
        e.printStackTrace();
    }

}

From source file:MainClass.java

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

    for (int i = 0; i < args.length; i++) {
        FileInputStream fin = new FileInputStream(args[i]);
        ZipInputStream zin = new ZipInputStream(fin);
        ZipEntry ze = null;/*ww  w  .  j a  va  2  s  .  co m*/
        while ((ze = zin.getNextEntry()) != null) {
            System.out.println("Unzipping " + ze.getName());
            FileOutputStream fout = new FileOutputStream(ze.getName());
            for (int c = zin.read(); c != -1; c = zin.read()) {
                fout.write(c);
            }
            zin.closeEntry();
            fout.close();
        }
        zin.close();
    }
}

From source file:FileIOApp.java

public static void main(String args[]) throws IOException {
    FileOutputStream outStream = new FileOutputStream("test.txt");
    String s = "This is a test.";
    for (int i = 0; i < s.length(); ++i)
        outStream.write(s.charAt(i));
    outStream.close();/*from  w w w  .ja  v a2 s. c om*/
    FileInputStream inStream = new FileInputStream("test.txt");
    int inBytes = inStream.available();
    System.out.println("inStream has " + inBytes + " available bytes");
    byte inBuf[] = new byte[inBytes];
    int bytesRead = inStream.read(inBuf, 0, inBytes);
    System.out.println(bytesRead + " bytes were read");
    System.out.println("They are: " + new String(inBuf));
    inStream.close();
    File f = new File("test.txt");
    f.delete();
}