Example usage for java.lang System getProperty

Introduction

In this page you can find the example usage for java.lang System getProperty.

Prototype

public static String getProperty(String key) 

Source Link

Document

Gets the system property indicated by the specified key.

Usage

From source file:Main.java

public static void main(String[] args) throws Exception {
    String[] properties = { "os.name", "java.version", "java.vm.version", "java.vendor" };
    for (String property : properties) {
        System.out.println(property + ": " + System.getProperty(property));
    }//  w  w  w  . j  av a  2  s .  c  o m
    JFileChooser jfc = new JFileChooser();
    jfc.showOpenDialog(null);
    jfc.addChoosableFileFilter(new FileFilter() {
        @Override
        public boolean accept(File f) {
            return f.isDirectory() || f.getName().toLowerCase().endsWith(".obj");
        }

        @Override
        public String getDescription() {
            return "Wavefront OBJ (*.obj)";
        }

        @Override
        public String toString() {
            return getDescription();
        }
    });
    int result = JOptionPane.showConfirmDialog(null, "Description was 'All Files'?");
    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    SwingUtilities.updateComponentTreeUI(jfc);
    jfc.showOpenDialog(null);
    result = JOptionPane.showConfirmDialog(null, "Description was 'All Files'?");

    result = JOptionPane.showConfirmDialog(null, "Description was 'All Files'?");
    for (UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
        if ("Nimbus".equals(info.getName())) {
            UIManager.setLookAndFeel(info.getClassName());
            SwingUtilities.updateComponentTreeUI(jfc);
            break;
        }
    }
    jfc.showOpenDialog(null);
    result = JOptionPane.showConfirmDialog(null, "Description was 'All Files'?");
}

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From source file:Main.java

public static void main(String[] argv) throws Exception {
    String filename = System.getProperty("java.home")
            + "/lib/security/cacerts".replace('/', File.separatorChar);
    FileInputStream is = new FileInputStream(filename);
    KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType());
    String password = "password";
    keystore.load(is, password.toCharArray());

    PKIXParameters params = new PKIXParameters(keystore);

    params.setRevocationEnabled(false);//from  w  ww . j av  a 2s  . co  m

    CertPathValidator certPathValidator = CertPathValidator.getInstance(CertPathValidator.getDefaultType());
    CertPath certPath = null;
    CertPathValidatorResult result = certPathValidator.validate(certPath, params);

    PKIXCertPathValidatorResult pkixResult = (PKIXCertPathValidatorResult) result;
    TrustAnchor ta = pkixResult.getTrustAnchor();
    X509Certificate cert = ta.getTrustedCert();
}

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From source file:Main.java

public static void main(String[] args) throws Exception {
    Scanner scanner = new Scanner(new File("fileName"));
    scanner.useDelimiter(System.getProperty("line.separator"));
    while (scanner.hasNext()) {
        parseLine(scanner.next());//from www  . j a  v  a  2s  .  co m
    }
    scanner.close();
}

---

From source file:Main.java

public static void main(String[] args) {
    Path src = Paths.get("test.txt");
    String encoding = System.getProperty("file.encoding");
    Charset cs = Charset.forName(encoding);
    try (SeekableByteChannel seekableChannel = Files.newByteChannel(src, READ, WRITE, CREATE,
            TRUNCATE_EXISTING)) {//from www  .j a va 2 s.  co m
        printDetails(seekableChannel, "Before writing data");
        writeData(seekableChannel, cs);
        printDetails(seekableChannel, "After writing data");

        seekableChannel.position(0);
        printDetails(seekableChannel, "After resetting position to 0");
        readData(seekableChannel, cs);
        printDetails(seekableChannel, "After reading data");
    } catch (IOException e) {
        e.printStackTrace();
    }
}

---

From source file:Main.java

public static void main(String[] args) {
    final JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JButton loadButton = new JButton("Display Image");
    loadButton.addActionListener(ev -> {
        JFileChooser fc = new JFileChooser(System.getProperty("user.home"));
        fc.addChoosableFileFilter(/* w w  w .j av  a2  s  .c  o m*/
                new FileNameExtensionFilter("Image files", new String[] { "png", "jpg", "jpeg", "gif" }));
        if (fc.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
            try {
                Image image = ImageIO.read(fc.getSelectedFile());
                if (image != null) {
                    JPanel panel = new JPanel(new BorderLayout(10, 10));
                    panel.add(new JLabel(fc.getSelectedFile().toString()), BorderLayout.NORTH);
                    panel.add(new JLabel(new ImageIcon(image)));
                    JOptionPane.showMessageDialog(frame, panel);
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
    });

    frame.add(loadButton);
    frame.pack();
    frame.setLocationByPlatform(true);
    frame.setVisible(true);
}

---

From source file:ProcessBuilderDemo.java

public static void main(String argv[]) throws InterruptedException, IOException {

    List<String> command = new ArrayList<String>();
    command.add("notepad");
    command.add("foo.txt");
    ProcessBuilder builder = new ProcessBuilder(command);
    Map<String, String> environ = builder.environment();
    environ.put("PATH", "/windows;/windows/system32;/winnt");
    builder.directory(new File(System.getProperty("user.home")));

    final Process godot = builder.start();

    godot.waitFor();//from  w  w w.  java  2s  .c om

    System.out.println("Program terminated!");
    return;
}

---

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    FileChannel fc = new FileOutputStream("data2.txt").getChannel();
    fc.write(ByteBuffer.wrap("Some text".getBytes()));
    fc.close();/* ww w .  j a  va2 s .c  o  m*/
    fc = new FileInputStream("data2.txt").getChannel();
    ByteBuffer buff = ByteBuffer.allocate(BSIZE);
    fc.read(buff);
    buff.flip();

    System.out.println(buff.asCharBuffer());
    // Decode using this system's default Charset:
    buff.rewind();
    String encoding = System.getProperty("file.encoding");
    System.out.println("Decoded using " + encoding + ": " + Charset.forName(encoding).decode(buff));
    // Or, we could encode with something that will print:
    fc = new FileOutputStream("data2.txt").getChannel();
    fc.write(ByteBuffer.wrap("Some text".getBytes("UTF-16BE")));
    fc.close();

}

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From source file:FileTableDemo.java

public static void main(String[] args) {
    // Figure out what directory to display;
    File dir;//from  ww  w . j a  v  a 2  s  . c om
    if (args.length > 0)
        dir = new File(args[0]);
    else
        dir = new File(System.getProperty("user.home"));

    // Create a TableModel object to represent the contents of the directory
    FileTableModel model = new FileTableModel(dir);

    // Create a JTable and tell it to display our model
    JTable table = new JTable(model);

    // Display it all in a scrolling window and make the window appear
    JFrame frame = new JFrame("FileTableDemo");
    frame.getContentPane().add(new JScrollPane(table), "Center");
    frame.setSize(600, 400);
    frame.setVisible(true);
}

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From source file:FileTreeDemo.java

public static void main(String[] args) {
    // Figure out where in the filesystem to start displaying
    File root;/*from  www  .j a va  2s  .co m*/
    if (args.length > 0)
        root = new File(args[0]);
    else
        root = new File(System.getProperty("user.home"));

    // Create a TreeModel object to represent our tree of files
    FileTreeModel model = new FileTreeModel(root);

    // Create a JTree and tell it to display our model
    JTree tree = new JTree();
    tree.setModel(model);

    // The JTree can get big, so allow it to scroll.
    JScrollPane scrollpane = new JScrollPane(tree);

    // Display it all in a window and make the window appear
    JFrame frame = new JFrame("FileTreeDemo");
    frame.getContentPane().add(scrollpane, "Center");
    frame.setSize(400, 600);
    frame.setVisible(true);
}

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From source file:Main.java

public static final void main(String[] argv) throws Exception {
    Class.forName("oracle.jdbc.OracleDriver");
    Connection conn = DriverManager.getConnection("your_connection_string", "your_user_name", "your_password");
    Date nowDate = new Date();
    Timestamp nowTimestamp = new Timestamp(nowDate.getTime());
    PreparedStatement insertStmt = conn.prepareStatement(
            "INSERT INTO MyTable" + " (os_name, ts, ts_with_tz, ts_with_local_tz)" + " VALUES (?, ?, ?, ?)");
    insertStmt.setString(1, System.getProperty("os.name"));
    insertStmt.setTimestamp(2, nowTimestamp);
    insertStmt.setTimestamp(3, nowTimestamp);
    insertStmt.setTimestamp(4, nowTimestamp);
    insertStmt.executeUpdate();//from  w  ww  . j  a  v a 2 s .  c o  m
    insertStmt.close();
    System.out.println("os_name, ts, ts_with_tz, ts_with_local_tz");
    PreparedStatement selectStmt = conn
            .prepareStatement("SELECT os_name, ts, ts_with_tz, ts_with_local_tz" + " FROM MyTable");
    ResultSet result = null;
    result = selectStmt.executeQuery();
    while (result.next()) {
        System.out.println(String.format("%s,%s,%s,%s", result.getString(1), result.getTimestamp(2).toString(),
                result.getTimestamp(3).toString(), result.getTimestamp(4).toString()));
    }
    result.close();
    selectStmt.close();
    conn.close();
}

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