/* * R2D2 class Builds the GUI interface for encrypting * messages with the help of R2D2 * * CSCE 155 Fall 2005 * Assignment 2 * @author * @version */ // import statements (add them here if you have any) import java.awt.*; import java.awt.event.*; import javax.swing.*; /** * * @author */ public class R2D2 extends JFrame implements ActionListener{ // Variables declaration // add more variables if you like // clear button private JButton clearButton; // encrypt button private JButton encryptButton; // for showing label "Encrypted Message" private JLabel encryptedMessageLabel; // for displaying encrypted message in a scroll pane private JScrollPane encryptedMessageScrollPane; // textArea displaying the encrypted message private JTextArea encryptedMessageTextArea; // textArea for displaying the information about this form private JTextArea formDescriptionTextArea; // form heading private JLabel formHeadingLabel; // label for input message text area private JLabel inputMessageLabel; // scrollPane for the user to input message private JScrollPane inputMessageScrollPane; // textArea for the user to write the input message private JTextArea inputMessageTextArea; // label for obiwan's image private JLabel obiWanImageLabel; // label for r2d2's image private JLabel r2D2ImageLabel; // "Time Taken" label private JLabel timeTakenLabel; // label for showing "nano seonds" private JLabel timeTakenNanoSecondsLabel; // textField displaying the time taken for encryption private JTextField timeTakenTextField; // label for the receiverTextField shows "Receiver" private JLabel receiverLabel; // textField for typing in the receiver of the message private JTextField receiverTextField; // label for urgencyTextField shows "Urgency" private JLabel urgencyLabel; // textField for typing in the urgency of the message private JTextField urgencyTextField; // End of variables declaration /** Creates new form R2D2 */ public R2D2() { setOutputDisplay(); } /** This method is called from within the constructor to * initialize the form. * * This method initializes all the GUI components */ private void setOutputDisplay() { // -------------------------------------------------------------------------- // The following declares GUI components, such as JButton, JLabel, and // JTextField. Check out the online API to find out what these are // and how to use them // -------------------------------------------------------------------------- // layout getContentPane().setLayout(null); // default close operation and preferred size of the frame setDefaultCloseOperation(EXIT_ON_CLOSE); setPreferredSize(new Dimension(600, 700)); // ------------------------------------------------------------------------- // Set 1 // For "form heading" // 1. initialize the label // 2. font properties // 3. the label describing the display // 4. bounds // 5. added to contentPane // ------------------------------------------------------------------------- formHeadingLabel = new JLabel(); formHeadingLabel.setFont(new Font("Courier New", 1, 12)); formHeadingLabel.setText("R2D2 Message Encryption Service"); formHeadingLabel.setBounds(210, 20, 217, 14); getContentPane().add(formHeadingLabel); // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // set 2 // declares the form description text area formDescriptionTextArea = new JTextArea(); formDescriptionTextArea.setText("This Form encrypts messages and calculates\nthe total time taken for encryption"); getContentPane().add(formDescriptionTextArea); formDescriptionTextArea.setBounds(100, 50, 440, 40); formDescriptionTextArea.setEditable(false); // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // set 3 inputMessageLabel = new JLabel(); // you have to set the bounds, size and locations for inputMessageLabel here // you have to set the text for inputMessageLabel to "Input Message" here getContentPane().add(inputMessageLabel); // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // set 4 // the input message scroll pane and text area // 1. initialize // 2. set bounds // 3. initialize textArea // 4. put the textArea in the scrollPane // 5. add the scrollPane to the contentPane inputMessageScrollPane = new JScrollPane(); inputMessageScrollPane.setBounds(190, 110, 300, 140); inputMessageTextArea = new JTextArea(); inputMessageScrollPane.setViewportView(inputMessageTextArea); getContentPane().add(inputMessageScrollPane); // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // Set 5 // For "Encrypted Message" label encryptedMessageLabel = new JLabel(); // you have to set the bounds, size and locations for encryptedMessageLabel here // you have to set the text for encryptedMessageLabel to "Encrypted Message" here getContentPane().add(encryptedMessageLabel); // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // set 6 // the encrypted message scroll pane and text area // 1. initialize // 2. set bounds // 3. initialize textArea // 4. put the textArea in the scrollPane // 5. add the scrollPane to the contentPane encryptedMessageScrollPane = new JScrollPane(); encryptedMessageScrollPane.setBounds(190, 280, 300, 140); encryptedMessageTextArea = new JTextArea(); encryptedMessageScrollPane.setViewportView(encryptedMessageTextArea); getContentPane().add(encryptedMessageScrollPane); encryptedMessageScrollPane.setBounds(190, 280, 300, 140); // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // set 7 r2d2ImageLabel // 1. Initialize r2d2ImageLabel // 2. specify the image file // 3. set bounds for the label // 4. add the image to the contentPane // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // set 8 obiWanImageLabel // 1. Initialize obiWanImageLabel // 2. specify the image file // 3. set bounds for the label // 4. add the image to the contentPane obiWanImageLabel = new JLabel(); obiWanImageLabel.setIcon(new ImageIcon("obi-wan.jpg")); obiWanImageLabel.setBounds(510, 290, 71, 111); getContentPane().add(obiWanImageLabel); // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // set 9 receiverLabel // 1. Initialize receiverLabel // 2. set text // 3. set bounds for the label // 4. add the label to the contentPane // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // set 10 receiverTextField // 1. Initialize receiverTextField // 2. set text // 3. set bounds for the receiverTextField // 4. add the receiverTextField to the contentPane // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // set 11 urgencyLabel // 1. Initialize urgencyLabel // 2. set text // 3. set bounds for the label // 4. add the label to the contentPane // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // set 12 urgencyTextField // 1. Initialize urgencyTextField // 2. set text // 3. set bounds for the urgencyTextField // 4. add the urgencyTextField to the contentPane // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // set 13 // clearButton // 1. Initialize the clear Button // 2. Set button text label to "Clear" // 3. Set bounds // 4. add ActionListener to the clearButton // 5. add clear button to the content pane // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // set 14 // encryptButton encryptButton = new JButton(); encryptButton.setText("Encrypt"); encryptButton.setBounds(330, 570, 120, 23); encryptButton.addActionListener(this); getContentPane().add(encryptButton); // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // set 15 // for timeTakenLabel timeTakenLabel = new JLabel(); // 1. set the label to "Time Taken" // 2. set the bounds getContentPane().add(timeTakenLabel); // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // set 16 // textField for displaying the time taken for encryption timeTakenTextField = new JTextField(); // 1. set the label of the textField to "0" // 2. set bounds // 3. add the textField to the contentPane // ------------------------------------------------------------------------- // ------------------------------------------------------------------------- // set 17 // create the label showing "nano seconds" timeTakenNanoSecondsLabel = new JLabel(); // 1. set the text to "nano seconds" // 2. set the bounds // 3. add the label to the contentPane // ------------------------------------------------------------------------- // pack the components and show pack(); setVisible(true); } // end of setOutputDisplay /** * This is a very very special method. * We will talk about this in Event-Driven Programming. But, you are * ENCOURAGED to try to figure out what it does. This is really fun stuff. * It basically reacts to user-generated events such as the selection of a * button, the entry into a textfield, etc. and then calls other methods to * carry out tasks that correspond to the user-generated events * Basically, if the user clicks the encryptButton, it should compute all * the necessary output. If the user clicks the clearButton, it should * empty all the textfields and set 0 in the timeTakenTextField * Note: for the extra credit part, you will need to also handle the * "change picture" of a JButton object. */ public void actionPerformed(ActionEvent event){ String command = event.getActionCommand(); if(command.equals("Encrypt")){ // if user clicks encrypt button if(this.inputMessageTextArea.getText().length()==0){ //popUp the JOptionPane and inform the user about the error } // end of if inputMessage is zero length else{ // the user input is not blank, so encrypt the message } //end of else if inputMessage is not blank } // end of if user clicks Encrypt // complete the event handler for the clearButton if(command.equals("Clear")){ // if user clicks encrypt button // you should use the clearFields method to clear all the fields } // end of if user clicks Clear } // end of actionPerformed /** * This method clears the entries of all Textfield, TextArea objects. * It puts "0" in timeTakenTextField, and empty strings inputMessageTextArea, encryptedMessageTextArea, * receiverTextField and urgencyTextField * * Yet to be implemented. */ private void clearFields() { // you will have to implement this } // end clearFields /** * This method encrypts the input message and calculates the time required for encryption * * Rewrite this method so that it encrypts the * input message and calculates the time required for encryption * Please consult the following Java Class APIs: * a. StringBuffer class (used for manipulating Strings) * b. String class (read the split method) * c. StringBuilder class (you may use it to reverse strings) * d. System class (for getting the value of the system timer in nanoseconds) * You may use the following steps to encrypt the string * a. mark the start time * b. separate the words of the input message (based on space) and store them in a String array * c. loop (for/while) through the array, reverse each word and store it in the StringBuffer * d. mark the endTime of the encryption process (timeTaken = endTime - startTime) * e. display the encrypted message and the timeTaken using displayValues method * * Partially implemented only. */ public void encryptMessage(){ return; } // end of encryptMessage /** * This method displays the two values in two Textfield objects: * puts encryptedMessage in encryptedMessageTextArea and timeTaken in timeTakenTextField * Yet to be implemented. */ private void displayValues(String encryptedMessage, String timeTaken) { // you will be find out how to do this. Check out the online API to find // out what methods you will have to use } // end displayValues /** * @param args the command line arguments */ public static void main(String args[]) { R2D2 application = new R2D2(); } // end of main method } // end of class R2D2