复利计算器v1

public class MainFrame extends JFrame {
    
    /**
     * 文本框
     */
    private TextField[] texts = new TextField[5];
    
    /**
     * 标签
     */
    private JLabel[] labels = new JLabel[5];
    
    /**
     * 标签值
     */
    private String[] labelTexts = {"存入本金:","年利率(%):","存入年限:","年复利次数:","复利终值:"};
    
    /**
     * 确定按钮
     */
    private JButton jbtOk = new JButton("确定");
    
    /**
     * 退出按钮
     */
    private JButton jbtExit = new JButton("退出");
    
    /**
     * 利率获取时间的整数倍
     */
    private double N;
    
    /**
     * 复利终值
     */
    private double F;
    
    /**
     * 存入年限
     */
    private double Y;
    
    /**
     * 本金
     */
    private double P;
    
    /**
     * 利率
     */
    private double R;
    
    /**
     * 本金计算方式
     */
    private boolean pFlag;
    
    /**
     * 复利计算方式
     */
    private boolean fFlag;
    
    /**
     * 主窗体
     */
    public MainFrame() {
        this.setTitle("复利计算器");
        this.setBoundAtCenter();
        this.setResizable(true);
        //this.setLayout(new VFlowLayout());
        this.add(this.createTextPanel(), BorderLayout.CENTER);
        this.add(this.createButtonPanel(), BorderLayout.SOUTH);
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.setVisible(true);
    }

    /**
     * 居中窗体
     */
    private void setBoundAtCenter() {
        Toolkit toolkit = Toolkit.getDefaultToolkit();
        Dimension dim = toolkit.getScreenSize();
        this.setSize(245, 350);
        int width = dim.width - this.getWidth() >> 1;
        int hight = (dim.height - this.getHeight() >> 1) - 32;
        this.setLocation(width, hight);
    }
    
    /**
     * 初始化文本框与标签位置以及标签值
     */
    private void initTextField() {
        int x = 90;
        int y = 50;
        int w = 130;
        int h = 20;
        for (int i = 0; i < texts.length; i++) {
            texts[i] = new TextField(x, y, w, h);
            labels[i] = new JLabel(labelTexts[i]);
            labels[i].setBounds(x-80, y, w, h);
            y += 28;
        }
    }
    
    /**
     * 创建面板存放TextField和label
     */
    private JPanel createTextPanel() {
        JPanel panel = new JPanel();
        panel.setLayout(null);
        this.initTextField();
        for (int i = 0; i < texts.length; i++) {
            panel.add(texts[i]);
            panel.add(labels[i]);
        }
        return panel;
    }
    
    /**
     * 设置按钮以及监听
     */
    private JPanel createButtonPanel(){
        
        JPanel btnPanel = new JPanel(new VFlowLayout());
        JPanel btnPanel1 = new JPanel(new FlowLayout());
        
        
        //----------设置jbtOk的监听------------------
        this.jbtOk.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                if(!pFlag) {
                    texts[0].setText(String.valueOf(calculatePrincipal()));
                }else {
                    texts[4].setText(String.valueOf(calculateCInterest()));
                }
            }
            
        });
        
        btnPanel1.add(this.jbtOk);
        
        //----------设置jbtExit的监听------------------
        this.jbtExit.addActionListener(new ActionListener() {
            
            @Override
            public void actionPerformed(ActionEvent e) {
                // TODO Auto-generated method stub
                System.exit(EXIT_ON_CLOSE);
                
            }
        });
        
        btnPanel1.add(this.jbtExit);
        //先添加ButtonGroup
        btnPanel.add(this.createButtonGroup());
        btnPanel.add(btnPanel1);
        return btnPanel;
    }
    
    /**
     * 设置jradio按钮以及监听
     */
    private JPanel createButtonGroup() {
        JPanel grpPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
        ButtonGroup btnGrp = new ButtonGroup();
        JRadioButton jrb1 = new JRadioButton("本金");
        //----------设置jrb1的监听------------------
        jrb1.addActionListener(new ActionListener() {
            
            @Override
            public void actionPerformed(ActionEvent e) {
                pFlag = false;
                fFlag = true;
                changeType();
            }
        });
        btnGrp.add(jrb1);
        JRadioButton jrb2 = new JRadioButton("复利");
        //----------设置jrb2的监听------------------
        jrb2.addActionListener(new ActionListener() {
            
            @Override
            public void actionPerformed(ActionEvent e) {
                pFlag = true;
                fFlag = false;
                changeType();
            }
        });
        btnGrp.add(jrb2);
        grpPanel.add(jrb1);
        grpPanel.add(jrb2);
        return grpPanel;
    }
    
    private void changeType() {
        this.texts[0].setEnabled(pFlag);
        this.texts[4].setEnabled(fFlag);
        if(pFlag) {
            this.texts[4].setText("由此得出数值");
            this.texts[0].setText(null);
        } else {
            this.texts[0].setText("由此得出数值");
            this.texts[4].setText(null);
        }
    }

    /**
     * F=P*(1+i)N(次方)
     * F：复利终值
     * P：本金
     * R：利率
     * N：利率获取时间的整数倍
     * Y: 存入年限
     * 
     * 计算本金
     */
    private double calculatePrincipal(){
        this.R = Double.parseDouble(this.texts[1].getText().trim());
        this.Y = Double.parseDouble(this.texts[2].getText().trim());
        this.N = Double.parseDouble(this.texts[3].getText().trim());
        this.F = Double.parseDouble(this.texts[4].getText().trim());
        System.out.println(Math.pow((1+R),N));
        return F/Math.pow((1+R),N);
        
        
    }
    
    /**
     * 计算复利
     */
    private double calculateCInterest(){
        this.P = Double.parseDouble(this.texts[0].getText().trim());
        this.R = Double.parseDouble(this.texts[1].getText().trim());
        this.Y = Double.parseDouble(this.texts[2].getText().trim());
        this.N = Double.parseDouble(this.texts[3].getText().trim());
        return P*Math.pow((1+R),N);
    }
}