Example usage for java.lang String equals

Introduction

In this page you can find the example usage for java.lang String equals.

Prototype

public boolean equals(Object anObject)

Source Link

Document

Compares this string to the specified object.

Usage

From source file:Main.java

public static void main(String[] a) {
    JFrame frame = new JFrame("JFileChooser Popup");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JFileChooser fileChooser = new JFileChooser(".");
    fileChooser.setControlButtonsAreShown(false);
    frame.add(fileChooser, BorderLayout.CENTER);

    ActionListener actionListener = new ActionListener() {
        public void actionPerformed(ActionEvent actionEvent) {
            JFileChooser theFileChooser = (JFileChooser) actionEvent.getSource();
            String command = actionEvent.getActionCommand();
            if (command.equals(JFileChooser.APPROVE_SELECTION)) {
                File selectedFile = theFileChooser.getSelectedFile();
                System.out.println(selectedFile.getParent());
                System.out.println(selectedFile.getName());
            } else if (command.equals(JFileChooser.CANCEL_SELECTION)) {
                System.out.println(JFileChooser.CANCEL_SELECTION);
            }//from  ww  w .j  ava2s.c o  m
        }
    };
    fileChooser.addActionListener(actionListener);
    fileChooser.removeActionListener(actionListener);
    frame.pack();
    frame.setVisible(true);
}

From source file:EqualsNotEqualTo.java

public static void main(String args[]) {
    String s1 = "Hello";
    String s2 = new String(s1);

    System.out.println(s1 + " equals " + s2 + " -> " + s1.equals(s2));
    System.out.println(s1 + " == " + s2 + " -> " + (s1 == s2));
}

From source file:ChatClient.java

  public static void main(String[] args) throws Exception {
  DatagramSocket s = new DatagramSocket();
  byte[] buf = new byte[1000];
  DatagramPacket dp = new DatagramPacket(buf, buf.length);

  InetAddress hostAddress = InetAddress.getByName("localhost");
  while (true) {/*from  w  w  w .j a  va  2 s .  c o  m*/
    BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
    String outMessage = stdin.readLine();

    if (outMessage.equals("bye"))
      break;
    String outString = "Client say: " + outMessage;
    buf = outString.getBytes();

    DatagramPacket out = new DatagramPacket(buf, buf.length, hostAddress, 9999);
    s.send(out);

    s.receive(dp);
    String rcvd = "rcvd from " + dp.getAddress() + ", " + dp.getPort() + ": "
        + new String(dp.getData(), 0, dp.getLength());
    System.out.println(rcvd);
  }
}

From source file:Main.java

public static void main(String args[]) {
    String s1 = "demo2s.com";
    String s2 = new String(s1);

    System.out.println(s1 + " equals " + s2 + " -> " + s1.equals(s2));
    System.out.println(s1 + " == " + s2 + " -> " + (s1 == s2));
}

From source file:TreeExpandSample.java

public static void main(String args[]) {
    String title = ("JTree Expand Sample");
    JFrame frame = new JFrame(title);
    JTree tree = new JTree();
    TreeWillExpandListener treeWillExpandListener = new TreeWillExpandListener() {
        public void treeWillCollapse(TreeExpansionEvent treeExpansionEvent) throws ExpandVetoException {
            TreePath path = treeExpansionEvent.getPath();
            DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
            String data = node.getUserObject().toString();
            if (data.equals("colors")) {
                throw new ExpandVetoException(treeExpansionEvent);
            }/*  w w  w . ja  va2 s .  c om*/
        }

        public void treeWillExpand(TreeExpansionEvent treeExpansionEvent) throws ExpandVetoException {
            TreePath path = treeExpansionEvent.getPath();
            DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
            String data = node.getUserObject().toString();
            if (data.equals("sports")) {
                throw new ExpandVetoException(treeExpansionEvent);
            }
        }
    };
    tree.addTreeWillExpandListener(treeWillExpandListener);
    JScrollPane scrollPane = new JScrollPane(tree);
    frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
    frame.setSize(300, 150);
    frame.setVisible(true);
}

From source file:AddingActionCommandActionListenerSample.java

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

    JTextField textField = new JTextField();
    frame.add(textField, BorderLayout.NORTH);
    frame.add(new JTextField(), BorderLayout.SOUTH);

    InputVerifier verifier = new InputVerifier() {
        public boolean verify(JComponent input) {
            final JTextComponent source = (JTextComponent) input;
            String text = source.getText();
            if ((text.length() != 0) && !(text.equals("Exit"))) {
                JOptionPane.showMessageDialog(frame, "Can't leave.", "Error Dialog", JOptionPane.ERROR_MESSAGE);
                return false;
            } else {
                return true;
            }// w w w .ja  v a 2 s . c  om
        }
    };
    textField.setInputVerifier(verifier);

    frame.setSize(250, 150);
    frame.setVisible(true);
}

From source file:de.tu.darmstadt.lt.ner.preprocessing.SentenceToCRFWriter.java

public static void main(String[] args) throws UIMAException, IllegalArgumentException, IOException {
    LineIterator sentIt = FileUtils.lineIterator(new File(args[0]), "UTF-8");
    List<String> sentences = new ArrayList<String>();
    StringBuilder sb = new StringBuilder();
    int index = 0;
    while (sentIt.hasNext()) {
        String line = sentIt.nextLine().toString().trim().split("\t")[1];
        if (line.equals("")) {
            continue;
        }// w ww .  j av  a  2 s  . c  o  m
        sentences.add(line);
    }
    GermaNERMain.sentenceToCRFFormat(sentences, args[1], "de");
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    String s1 = "a";
    String s2 = "A";
    String s3 = "B";

    // Check if identical
    boolean b = s1.equals(s2); // false

    // Check if identical ignoring case
    b = s1.equalsIgnoreCase(s2); // true

}

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    JFrame frame = new JFrame("Property Split");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);

    splitPane.setTopComponent(new JLabel("www.java2s.com"));

    splitPane.setBottomComponent(new JLabel("www.java2s.com"));

    PropertyChangeListener propertyChangeListener = new PropertyChangeListener() {
        public void propertyChange(PropertyChangeEvent changeEvent) {
            JSplitPane sourceSplitPane = (JSplitPane) changeEvent.getSource();
            String propertyName = changeEvent.getPropertyName();
            if (propertyName.equals(JSplitPane.LAST_DIVIDER_LOCATION_PROPERTY)) {
                int current = sourceSplitPane.getDividerLocation();
                System.out.println("Current: " + current);
                Integer last = (Integer) changeEvent.getNewValue();
                System.out.println("Last: " + last);
                Integer priorLast = (Integer) changeEvent.getOldValue();
                System.out.println("Prior last: " + priorLast);
            }/*from  w  ww.j ava2 s .  c o  m*/
        }
    };

    // Attach listener
    splitPane.addPropertyChangeListener(propertyChangeListener);

    frame.add(splitPane, BorderLayout.CENTER);
    frame.setSize(300, 150);
    frame.setVisible(true);
}

From source file:MainClass.java

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

    JTextField nameTextField = new JTextField();
    frame.add(nameTextField, BorderLayout.NORTH);
    frame.add(new JTextField(), BorderLayout.SOUTH);

    InputVerifier verifier = new InputVerifier() {
        public boolean verify(JComponent input) {
            final JTextComponent source = (JTextComponent) input;
            String text = source.getText();
            if ((text.length() != 0) && !(text.equals("Exit"))) {
                JOptionPane.showMessageDialog(source, "Can't leave.", "Error Dialog",
                        JOptionPane.ERROR_MESSAGE);
                return false;
            } else {
                return true;
            }/*from w w  w . j  a v  a2 s  .c o m*/
        }
    };
    nameTextField.setInputVerifier(verifier);

    frame.setSize(250, 100);
    frame.setVisible(true);
}