pollclient.java

自己写的轮询提问的小程序 新手刚学 多多指教 合乎哈

        AnswerRadioButtonD.setText("D: " + q.getAnswerD());
        AnswerRadioButtonE.setText("E: " + q.getAnswerE());
        AnswerRadioButtonF.setText("F: " + q.getAnswerF());
        
        controlsSetEnabled(true);

        this.toFront();
        this.requestFocus();
    }
    
    private int getAnswer() {
        if (AnswerRadioButtonA.isSelected()) {return 1; }
        if (AnswerRadioButtonB.isSelected()) {return 2; }
        if (AnswerRadioButtonC.isSelected()) {return 3; }
        if (AnswerRadioButtonD.isSelected()) {return 4; }
        if (AnswerRadioButtonE.isSelected()) {return 5; }
        if (AnswerRadioButtonF.isSelected()) {return 6; }
        return 0;
    }
   
    public void controlsSetEnabled(boolean b) {
        if (!b) QuestionNameLabel.setText("Waiting for the next question...");

        QuestionTextArea.setEnabled(b);
        AnswerRadioButtonA.setEnabled(b);
        AnswerRadioButtonB.setEnabled(b);
        AnswerRadioButtonC.setEnabled(b);
        AnswerRadioButtonD.setEnabled(b);
        AnswerRadioButtonE.setEnabled(b);
        AnswerRadioButtonF.setEnabled(b);        

        if (b) {
            AnswerRadioButtonC.setVisible(b);
            AnswerRadioButtonD.setVisible(b);
            AnswerRadioButtonE.setVisible(b);
            AnswerRadioButtonF.setVisible(b);
        }        
        AnswersLabel.setEnabled(b);
        
        SendButton.setEnabled(b);        
        
        if (currentQuestion == null) return;
        
        if (currentQuestion.getNumOfAnswers() <= 2) {
            AnswerRadioButtonC.setEnabled(false);
            AnswerRadioButtonC.setVisible(false);
            AnswerRadioButtonC.setText("");
        }
        if (currentQuestion.getNumOfAnswers() <= 3) {
            AnswerRadioButtonD.setEnabled(false);
            AnswerRadioButtonD.setVisible(false);
            AnswerRadioButtonD.setText("");
        }
        if (currentQuestion.getNumOfAnswers() <= 4) {
            AnswerRadioButtonE.setEnabled(false);
            AnswerRadioButtonE.setVisible(false);
            AnswerRadioButtonE.setText("");
        }
        if (currentQuestion.getNumOfAnswers() <= 5) {
            AnswerRadioButtonF.setEnabled(false);  
            AnswerRadioButtonF.setVisible(false);  
            AnswerRadioButtonF.setText("");
        }
    }
  
    public void connect() {

        if (myNet != null) return;
        
        try {myNet = new Network(AddressTextField.getText(), Network.PORT_NUMBER); }
        catch (IOException e) {
            myNet = null;
            return;
        }
        ConnectButton.setEnabled(false);

        StatusLabel.setIcon(new ImageIcon(getClass().getResource("connected-icon.gif")));
        StatusLabel.setText("Connected to " + AddressTextField.getText());
        
        jButton1.setBounds(369, 313, 30, 28);
        ConnectButton.setVisible(false);
        AddressTextField.setVisible(false);
        jLabel1.setVisible(false);
        ConnectButton.setEnabled(false);
        AddressTextField.setEnabled(false);
        jLabel1.setEnabled(false);
        
        
        QuestionNameLabel.setVisible(true);
        TimeoutLabel.setVisible(true);
        QuestionTextArea.setVisible(true);

        this.setBounds(this.getX(), this.getY(), 408, 367);
        this.setVisible(false);
        this.setVisible(true);        

        start();
    }
    
    private void disconnect() {
        if (myNet != null) myNet.close();
        myNet = null;
        ConnectButton.setEnabled(true);
        t = null;
        
        StatusLabel.setIcon(new ImageIcon(getClass().getResource("disconnected-icon.gif")));           
        TimeoutLabel.setText("Time left: ");
        
        ConnectButton.setBounds(65, 60, 90, 30);
        AddressTextField.setBounds(40, 30, 140, 20);
        jLabel1.setBounds(30, 10, 90, 14);
        jButton1.setBounds(220-38, 130-55, 30, 28);
        
        ConnectButton.setVisible(true);
        AddressTextField.setVisible(true);
        jLabel1.setVisible(true);
        ConnectButton.setEnabled(true);
        AddressTextField.setEnabled(true);
        jLabel1.setEnabled(true);        
        
        QuestionNameLabel.setVisible(false);
        TimeoutLabel.setVisible(false);
        QuestionTextArea.setVisible(false);
        this.setBounds(this.getX(), this.getY(), 220, 130);
        this.setVisible(false);
        this.setVisible(true);        

    }
    
    public void start() {
        t = new Thread(this);
        t.start();
    }
    
    private int waitForQuestion() {
        int status = 0;
        int timeouts = 0;
        currentQuestion = null;
            while (status != Network.SERVER_SENDING_QUESTION) {

                if (myNet == null) return Network.SERVER_DISCONNECTED;
                status = myNet.checkForQuestionStatus();
                if (status == Network.SERVER_DISCONNECTED) {
                    disconnect();
                    return Network.SERVER_DISCONNECTED;
                }
                
                if (status == Network.CONNECTION_TIMED_OUT) timeouts++;
                if (status == Network.CHECK_BYTE) timeouts = 0;
                if (timeouts > 25) {
                    disconnect();
                    return Network.SERVER_DISCONNECTED;
                }
                
                try {t.sleep (50);} catch (InterruptedException e) { }
            }
            
            currentQuestion = myNet.recieveQuestion();
            if (currentQuestion != null) showQuestion(currentQuestion);
            else {
                disconnect();
                return Network.SERVER_DISCONNECTED;
            }
            return Network.QUESTION_CLOSED;
    }
    
    private void waitForAnswer() {
        int status = 0;
        int timeouts = 0;
        
        while (status != Network.QUESTION_CLOSED) {
            status = myNet.checkForQuestionStatus();
            if (status == Network.QUESTION_CLOSED) {
                controlsSetEnabled(false);
                break;
            }

            if (status == Network.SERVER_DISCONNECTED) {
                disconnect();
                controlsSetEnabled(false);
                return;
            }

            if (status == Network.CONNECTION_TIMED_OUT) timeouts++;
            if (status == Network.CHECK_BYTE) timeouts = 0;
            if (timeouts > 25) {
                disconnect();
                return;
            }            
            
            if (answer > 0) {
                myNet.sendAnswer(answer);
                answer = 0;
            }

            try {t.sleep (50);} catch (InterruptedException e) { }            
        }
    }
    
    public void run() {
        int status = 0;
        
        while (true) {
            controlsSetEnabled(false);
        
            status = waitForQuestion();

            if (status == Network.SERVER_DISCONNECTED) break;
            
            AnswerRadioButtonA.setSelected(true);            
            timeElapsed = 0;
            TimeoutTimer.start();
            TimeoutLabel.setText("Time left: " + Integer.toString(currentQuestion.getTimeout()));
            
            waitForAnswer();
            TimeoutTimer.stop();

        }
        
    }
        
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JTextField AddressTextField;
    private javax.swing.JRadioButton AnswerRadioButtonA;
    private javax.swing.JRadioButton AnswerRadioButtonB;
    private javax.swing.JRadioButton AnswerRadioButtonC;
    private javax.swing.JRadioButton AnswerRadioButtonD;
    private javax.swing.JRadioButton AnswerRadioButtonE;
    private javax.swing.JRadioButton AnswerRadioButtonF;
    private javax.swing.JLabel AnswersLabel;
    private javax.swing.JButton ConnectButton;
    private javax.swing.JLabel QuestionNameLabel;
    private javax.swing.JTextArea QuestionTextArea;
    private javax.swing.ButtonGroup RadioButtonGroup;
    private javax.swing.JButton SendButton;
    private javax.swing.JLabel StatusLabel;
    private javax.swing.JLabel TimeoutLabel;
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JSeparator jSeparator1;
    // End of variables declaration//GEN-END:variables
    
    protected Network myNet;
    private Thread t;
    private javax.swing.Timer TimeoutTimer;
    private int answer = 0;
    private Question currentQuestion = null;
    private int timeElapsed = 0;
}