0311单利复利

骑猪看日落 2021-12-22 01:39 228阅读 0赞

package ch1;
    
    import java.awt.Dimension;
    import java.awt.FlowLayout;
    import java.awt.GridLayout;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.text.NumberFormat;
    
    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JLabel;
    import javax.swing.JPanel;
    import javax.swing.JScrollPane;
    import javax.swing.JTextArea;
    import javax.swing.JTextField;
    
    public class fuli extends JFrame {
    
        private static final long serialVersionUID = 3347254632537686808L;
        private JLabel a1;             //标签
        private JLabel a2;
        private JLabel a3;
        private JTextField b1;           //本金
        private JTextField b2;           //利率
        private JTextField b3;          //年份
        private JButton c1;             
        private JButton c2;
        private JButton c3;
    
        private JTextArea text;        // 显示纯文本的多行区域
    
        public fuli() {
            creatComponents();           //创建零件
            layoutComponents();          //设计零件
            registerHandlers();          //鼠标监控
            setTitle("复利存款应用程序");
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            pack();
        }
    
        private void creatComponents() {
            a1 = new JLabel("本 金 ");
            a2 = new JLabel("年利率 ");
            a3 = new JLabel("年 数 ");
            b1 = new JTextField(10);
            b2 = new JTextField(10);
            b3 = new JTextField(10);
            c1 = new JButton("复利");
            c2 = new JButton("清除");
            c3=new JButton("单利");
            text = new JTextArea();
        }
    
        private void layoutComponents() {
            setLayout(new FlowLayout());
            JPanel panel1 = new JPanel();
            panel1.add(a1);
            panel1.add(b1);
            JPanel panel2 = new JPanel();
            panel2.add(a2);
            panel2.add(b2);
            JPanel panel3 = new JPanel();
            panel3.add(a3);
            panel3.add(b3);
            JPanel panel4 = new JPanel();
            panel4.add(c1);
            panel4.add(c2);
            panel4.add(c3);
            JPanel leftpanel = new JPanel(new GridLayout(4, 1));
            leftpanel.add(panel1);
            leftpanel.add(panel2);
            leftpanel.add(panel3);
            leftpanel.add(panel4);
            JScrollPane panel5 = new JScrollPane(text);
            panel5.setPreferredSize(new Dimension(200, 150));
            add(leftpanel);
            add(panel5);
        }
    
        private void registerHandlers() {
            c1ActionEventHander hander1 = new c1ActionEventHander();
            c1.addActionListener(hander1);
            c2ActionEventHander hander2 = new c2ActionEventHander();
            c2.addActionListener(hander2);
            c3ActionEventHander hander3=new c3ActionEventHander();
            c3.addActionListener(hander3);
    
        }
    
        private class c1ActionEventHander implements ActionListener {
            public void actionPerformed(ActionEvent e) {
                double principal=0;
                double amount;
                double rate;
                int n;
                NumberFormat currencyformatter = NumberFormat.getCurrencyInstance();        //字符串转化为数字
                String output = "年" + "/" + "复利存款";
                int year = 1;
                principal = Double.parseDouble(b1.getText());                            //字符串转化为数字
                rate = Double.parseDouble(b2.getText());
                n = Integer.parseInt(b3.getText());
                while (year <= n) {
                    amount = principal * Math.pow(1 + rate, year);
                    output += String.valueOf(year) + "\t" + currencyformatter.format(amount) + "\n";
                    year = year + 1;
                }
                text.setText(output);
            }
        }
    
        private class c2ActionEventHander implements ActionListener {
            public void actionPerformed(ActionEvent e) {
                b1.setText("");
                b2.setText("");
                b3.setText("");
                text.setText("");
            }
        }
    
        private class c3ActionEventHander implements ActionListener {
            public void actionPerformed(ActionEvent e) {
                double principal;
                double amount;
                double rate;
                int n;
                NumberFormat currencyformatter = NumberFormat.getCurrencyInstance();
                String output = "年" + "/" + "单利存款";
                int year = 1;
                principal = Double.parseDouble(b1.getText());
                rate = Double.parseDouble(b2.getText());
                n = Integer.parseInt(b3.getText());
                while (year <= n) {
                    amount = principal * (1 + rate* year);
                    output += String.valueOf(year) + "\t" + currencyformatter.format(amount) + "\n";
                    year = year + 1;
                }
                text.setText(output);
            }
        }
        public static void main(String[] args) {
            fuli frame = new fuli();
            frame.setVisible(true);
            frame.setSize(450, 200);
            frame.setResizable(false);
        }
    }

转载于:https://www.cnblogs.com/15linzhijie/p/5264372.html