/* * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * *   - Redistributions of source code must retain the above copyright *     notice, this list of conditions and the following disclaimer. * *   - Redistributions in binary form must reproduce the above copyright *     notice, this list of conditions and the following disclaimer in the *     documentation and/or other materials provided with the distribution. * *   - Neither the name of Sun Microsystems nor the names of its *     contributors may be used to endorse or promote products derived *     from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /*  * Java(TM) SE 6 version. */import java.applet.*;import java.awt.*;import javax.swing.*;import java.awt.event.*;public class Sender extends JApplet                     implements ActionListener {    private String myName;    private JTextField nameField;    private JTextArea status;    public void init() {        //Execute a job on the event-dispatching thread:        //creating this applet's GUI.        try {            SwingUtilities.invokeAndWait(new Runnable() {                public void run() {                    createGUI();                }            });        } catch (Exception e) {            System.err.println("createGUI didn't successfully complete");        }    }    private void createGUI() {        JPanel contentPane = new JPanel(new GridBagLayout());        contentPane.setBorder(BorderFactory.createCompoundBorder(                                    BorderFactory.createLineBorder(Color.BLACK),                                    BorderFactory.createEmptyBorder(10,10,5,5)));        setContentPane(contentPane);                GridBagConstraints c = new GridBagConstraints();        c.insets = new Insets(0,0,5,5);        JLabel receiverLabel = new JLabel("Receiver name:",                                           JLabel.TRAILING);        add(receiverLabel, c);        nameField = new JTextField(getParameter("RECEIVERNAME"),                                                10);        c.fill = GridBagConstraints.HORIZONTAL;        c.weightx = 1.0;        add(nameField, c);        nameField.addActionListener(this);        JButton button = new JButton("Send message");        c.gridwidth = GridBagConstraints.REMAINDER; //end row        c.anchor = GridBagConstraints.LINE_START; //stick to the                                                   //text field        c.fill = GridBagConstraints.NONE; //keep the button                                           //small        c.weightx = 0.0;        add(button, c);        button.addActionListener(this);        status = new JTextArea(5, 60);        status.setEditable(false);        c.anchor = GridBagConstraints.CENTER; //reset to the default        c.fill = GridBagConstraints.BOTH; //make this big        c.weighty = 1.0;        add(new JScrollPane(status), c);        myName = getParameter("NAME");        JLabel senderLabel = new JLabel("(My name is " + myName + ".)",                                        JLabel.CENTER);        c.weightx = 0.0;        c.weighty = 0.0;        add(senderLabel, c);    }    public void actionPerformed(ActionEvent event) {        Applet receiver = null;        String receiverName = nameField.getText(); //Get name to                                                    //search for.        receiver = getAppletContext().getApplet(receiverName);        if (receiver != null) {            //Use the instanceof operator to make sure the applet            //we found is a Receiver object.            if (!(receiver instanceof Receiver)) {                status.append("Found applet named "                              + receiverName + ", "                              + "but it's not a Receiver object.\n");            } else {                status.append("Found applet named "                              + receiverName + "\n"                              + "  Sending message to it.\n");                //Cast the receiver to be a Receiver object                //(instead of just an Applet object) so that the                //compiler will let us call a Receiver method.                ((Receiver)receiver).processRequestFrom(myName);            }        } else {            if (receiverName == null || receiverName.length() == 0) {                receiverName = "<no name>";            }            status.append("Couldn't find any applet named "                          + receiverName + ".\n");        }    }    public String getAppletInfo() {        return "Sender by Kathy Walrath";    }}