package fulijisuan; import java.applet.Applet; import java.awt.Button; import java.awt.Checkbox; import java.awt.CheckboxGroup; import java.awt.Color; import java.awt.Dimension; import java.awt.Font; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JTextField; public class fulijisuan1 extends Applet implements ActionListener, MouseListener, ItemListener { static JTextField jTextmoney = new JTextField(); static JTextField jTextrate = new JTextField(); static JTextField jTextyears = new JTextField(); static JTextField jTextfinally = new JTextField(); static JTextField jTextResult = new JTextField(); static JLabel jLabletitle = new JLabel("复利计算器"); static JLabel jLablemoney = new JLabel("本金"); static JLabel jLablerate = new JLabel("利率"); static JLabel jLableyears = new JLabel("年期"); static JLabel jLablefinally = new JLabel("终值"); JLabel jLableResult = new JLabel("结果"); static calculate calculate = new calculate(); Button b1 = new Button("确认"); Button b2 = new Button("清除"); Checkbox ckbHB[] = new Checkbox[8]; CheckboxGroup ckgHB = new CheckboxGroup(); public void init() // 初始化，堆砌界面 { setLayout(null); // 不设布局管理器 setBackground(new Color(255, 250, 150)); addMouseListener(this);// 将本类作为鼠标事件的接口响应鼠标动作 add(b1); // 将事先定义好的第一个按钮添加入界面 b1.setBounds(350, 350, 100, 50); // 设置第一个按钮左上角的位置和大小 b1.addActionListener(this);// 将本类作为按钮事件的接口响应按钮动作 add(b2); b2.setBounds(350, 400, 100, 50); b2.addActionListener(this); add(jTextmoney); jTextmoney.setBounds(100, 140, 220, 30); jTextmoney.addActionListener(this); add(jTextrate); jTextrate.setBounds(100, 190, 220, 30); jTextrate.addActionListener(this); add(jTextyears); jTextyears.setBounds(100, 240, 220, 30); jTextyears.addActionListener(this); add(jTextfinally); jTextfinally.setBounds(100, 290, 220, 30); jTextfinally.addActionListener(this); add(jTextResult); jTextResult.setBounds(550, 10, 440, 450); jTextResult.addActionListener(this); add(jLabletitle); jLabletitle.setBounds(100, 30, 200, 50); jLabletitle.setForeground(Color.red); jLabletitle.setFont(new Font("微软雅黑", Font.BOLD, 30)); add(jLablemoney); jLablemoney.setBounds(50, 140, 30, 30); add(jLablerate); jLablerate.setBounds(50, 190, 30, 30); add(jLableyears); jLableyears.setBounds(50, 240, 30, 30); add(jLablefinally); jLablefinally.setBounds(50, 290, 30, 30); add(jLableResult); jLableResult.setBounds(500,10, 30, 30); jTextResult.setEditable(false); ckbHB[0] = new Checkbox("求总额复利", ckgHB, false); ckbHB[0].setBounds(350, 20, 100, 40); ckbHB[1] = new Checkbox("求总额单利", ckgHB, false); ckbHB[1].setBounds(350, 60, 100, 40); ckbHB[2] = new Checkbox("求本金", ckgHB, false); ckbHB[2].setBounds(350, 100, 100, 40); ckbHB[3] = new Checkbox("求年期", ckgHB, false); ckbHB[3].setBounds(350, 140, 100, 40); ckbHB[4] = new Checkbox("求利率", ckgHB, false); ckbHB[4].setBounds(350, 180, 100, 40); ckbHB[5] = new Checkbox("若连本带利投资，最后得到的资产总值", ckgHB, false); ckbHB[5].setBounds(350, 220, 100, 40); ckbHB[6] = new Checkbox("若投资本金每年不变，最后得到的资产总值", ckgHB, false); ckbHB[6].setBounds(350, 260, 100, 40); ckbHB[7] = new Checkbox("银行贷款", ckgHB, false); ckbHB[7].setBounds(350, 300, 100, 40); add(ckbHB[0]); add(ckbHB[1]); add(ckbHB[2]); add(ckbHB[3]); add(ckbHB[4]); add(ckbHB[5]); add(ckbHB[6]); add(ckbHB[7]); ckbHB[0].addItemListener(this); ckbHB[1].addItemListener(this); ckbHB[2].addItemListener(this); ckbHB[3].addItemListener(this); ckbHB[4].addItemListener(this); ckbHB[5].addItemListener(this); ckbHB[6].addItemListener(this); ckbHB[7].addItemListener(this); this.resize(new Dimension(1000, 500)); } public void enable(boolean e) { // 设置组件状态 b1.setEnabled(e); b2.setEnabled(e); ckbHB[0].setEnabled(e); ckbHB[1].setEnabled(e); ckbHB[2].setEnabled(e); ckbHB[3].setEnabled(e); ckbHB[4].setEnabled(e); ckbHB[5].setEnabled(e); ckbHB[6].setEnabled(e); ckbHB[7].setEnabled(e); } public static void reducingState() { // 清除文本框的值 jTextmoney.setVisible(true); jLablemoney.setVisible(true); jTextrate.setVisible(true); jLablerate.setVisible(true); jTextyears.setVisible(true); jLableyears.setVisible(true); jTextfinally.setVisible(true); jLablefinally.setVisible(true); } @Override public void itemStateChanged(ItemEvent arg0) { // 做完选择后的变化 if (ckbHB[0].getState()) { fulijisuan1.reducingState(); jTextfinally.setVisible(false); jLablefinally.setVisible(false); } else if (ckbHB[1].getState()) { fulijisuan1.reducingState(); jTextfinally.setVisible(false); jLablefinally.setVisible(false); } else if (ckbHB[2].getState()) { fulijisuan1.reducingState(); jTextmoney.setVisible(false); jLablemoney.setVisible(false); } else if (ckbHB[3].getState()) { fulijisuan1.reducingState(); jTextyears.setVisible(false); jLableyears.setVisible(false); } else if (ckbHB[4].getState()) { fulijisuan1.reducingState(); jTextrate.setVisible(false); jLablerate.setVisible(false); } else if (ckbHB[5].getState()) { fulijisuan1.reducingState(); jTextfinally.setVisible(false); jLablefinally.setVisible(false); } else if (ckbHB[6].getState()) { fulijisuan1.reducingState(); jTextfinally.setVisible(false); jLablefinally.setVisible(false); } else if (ckbHB[7].getState()) { fulijisuan1.reducingState(); jTextfinally.setVisible(false); jLablefinally.setVisible(false); } } @Override public void mouseClicked(MouseEvent arg0) { } @Override public void mouseEntered(MouseEvent arg0) { } @Override public void mouseExited(MouseEvent arg0) { } @Override public void mousePressed(MouseEvent arg0) { } @Override public void mouseReleased(MouseEvent arg0) { } @Override public void actionPerformed(ActionEvent e) { // 确定后显示结果和清除文本框的值 if (e.getSource() == b1) { double money = 0; double rate = 0; double years = 0; double Finally = 0; try { jTextResult.setText(""); if (ckbHB[0].getState()) { // 总额复利 money = Double.valueOf(jTextmoney.getText().toString()).doubleValue(); rate = Double.valueOf(jTextrate.getText().toString()).doubleValue(); years = Double.valueOf(jTextyears.getText().toString()).doubleValue(); Finally = calculate.calculatezongefuli(money, rate, years); jTextResult.setText(Double.toString(Finally)); } else if (ckbHB[1].getState()) { // 总额单利 money = Double.valueOf(jTextmoney.getText().toString()).doubleValue(); rate = Double.valueOf(jTextrate.getText().toString()).doubleValue(); years = Double.valueOf(jTextyears.getText().toString()).doubleValue(); Finally = calculate.calculatezongedanli(money, rate, years); jTextResult.setText(Double.toString(Finally)); } else if (ckbHB[2].getState()) { // 本金 rate = Double.valueOf(jTextrate.getText().toString()).doubleValue(); years = Double.valueOf(jTextyears.getText().toString()).doubleValue(); Finally = Double.valueOf(jTextfinally.getText().toString()).doubleValue(); money = calculate.calculatebenjin(rate, years, Finally); jTextResult.setText(Double.toString(money)); } else if (ckbHB[3].getState()) { // 期限 money = Double.valueOf(jTextmoney.getText().toString()).doubleValue(); rate = Double.valueOf(jTextrate.getText().toString()).doubleValue(); Finally = Double.valueOf(jTextfinally.getText().toString()).doubleValue(); years = calculate.calculatenianqi(money, rate, Finally); jTextResult.setText(Double.toString(years)); } else if (ckbHB[4].getState()) { // 利率 money = Double.valueOf(jTextmoney.getText().toString()).doubleValue(); years = Double.valueOf(jTextyears.getText().toString()).doubleValue(); Finally = Double.valueOf(jTextfinally.getText().toString()).doubleValue(); rate = calculate.calculaterate(money, years, Finally); jTextResult.setText(Double.toString(rate)); } else if (ckbHB[5].getState()) { // 若连本带利投资，最后得到的资产总值 money = Double.valueOf(jTextmoney.getText().toString()).doubleValue(); rate = Double.valueOf(jTextrate.getText().toString()).doubleValue(); years = Double.valueOf(jTextyears.getText().toString()).doubleValue(); Finally = calculate.calculatemoneyandrate(money, rate, years); jTextResult.setText(Double.toString(Finally)); } else if (ckbHB[6].getState()) { // 若投资本金每年不变，最后得到的资产总值 money = Double.valueOf(jTextmoney.getText().toString()).doubleValue(); rate = Double.valueOf(jTextrate.getText().toString()).doubleValue(); years = Double.valueOf(jTextyears.getText().toString()).doubleValue(); Finally = calculate.calculatemoney(money, rate, years); jTextResult.setText(Double.toString(Finally)); } else if (ckbHB[7].getState()) { // 银行贷款 money = Double.valueOf(jTextmoney.getText().toString()).doubleValue(); rate = Double.valueOf(jTextrate.getText().toString()).doubleValue(); years = Double.valueOf(jTextyears.getText().toString()).doubleValue(); Finally = calculate.calculatedaikuan(money, rate, years); jTextResult.setText(Double.toString(Finally)); } } catch (Exception e1) { JOptionPane.showMessageDialog(null, "未输入正确的数据！", "错误提示", JOptionPane.ERROR_MESSAGE); System.out.println(e1); } } if (e.getSource() == b2) { jTextfinally.setText(""); jTextmoney.setText(""); jTextrate.setText(""); jTextyears.setText(""); jTextResult.setText(""); } } }
此次的复利计算并没有多大的变化，就多了个结果窗口弹出，把界面做的更好看些。