使用用户输入创建折线图

Question

所以即使开始创建一个接受用户给出的值的折线图，我也遇到了问题。我有到目前为止的代码（目前只计算增长率，这是分配的一部分）。所以我需要做的是获取用户输入的所有值（bv1，ev_1，ev_2，ev_3，ev_4和ev_5 ...），并使用它们绘制线图上具有金额的点在Y轴上，以及在X轴上的年份。对于图形的标签，我也应该在Java中使用HTML格式作为轴的标签。我知道我应该使用像superpaint g和@Override这样的东西，但我不知道从哪里开始（一些示例代码会有所帮助）。任何帮助都表示赞赏，因为这项任务明天到期！

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.RenderingHints;
import java.awt.Stroke;
import java.util.ArrayList;
import java.util.List;
public class Rate_Graph1 extends JApplet implements ActionListener
{
double E, B, N;
JLabel rateTitle, firstBv, ev1, ev2, ev3, ev4, ev5, returnRate;
JTextField bv1, ev_1, ev_2, ev_3, ev_4, ev_5, usersRate;
JButton calc;
public void setTop()
{
    rateTitle = new JLabel("Calculate your return rate!", JLabel.CENTER);
    add(rateTitle, BorderLayout.NORTH);
}
public void setMiddle()
{
    firstBv = new JLabel("Enter the beginning value:");
    bv1 = new JTextField("", 15);

    ev1 = new JLabel("Enter the value after the first year:");
    ev_1 = new JTextField("", 15);

    ev2 = new JLabel("Enter the value after the second year:");
    ev_2 = new JTextField("", 15);

    ev3 = new JLabel("Enter the value after the third year:");
    ev_3 = new JTextField("", 15);

    ev4 = new JLabel("Enter the value after the fourth year:");
    ev_4 = new JTextField("", 15);

    ev5 = new JLabel("Enter the value after the fifth, and final year:");
    ev_5 = new JTextField("", 15);

    JPanel pane1 = new JPanel(new FlowLayout());
    pane1.add(firstBv);
    pane1.add(bv1);

    pane1.add(ev1);
    pane1.add(ev_1);

    pane1.add(ev2);
    pane1.add(ev_2);

    pane1.add(ev3);
    pane1.add(ev_3);

    pane1.add(ev4);
    pane1.add(ev_4);

    pane1.add(ev5);
    pane1.add(ev_5);

    JPanel mainPane = new JPanel(new GridLayout(3, 1));
    mainPane.add(pane1);
    add(mainPane, BorderLayout.CENTER);
}
public void setBottom()
{
    returnRate = new JLabel("Your return rate is:");
    usersRate = new JTextField("", 15);
    calc = new JButton("Calculate Rate!");
    calc.addActionListener(this);
    JPanel pane4 = new JPanel(new FlowLayout());
    pane4.add(returnRate);
    pane4.add(usersRate);
    pane4.add(calc);

    add(pane4, BorderLayout.SOUTH);
}
public void init()
{
    setLayout(new BorderLayout());
    setTop();
    setMiddle();
    setBottom();
}
public void actionPerformed(ActionEvent event)
{
    if (event.getSource() == calc){
        E = Double.parseDouble(ev_5.getText());
        B = Double.parseDouble(bv1.getText());
        double rate = Math.pow(E / B, 1.0 / 5.0) - 1;
        usersRate.setText(+ rate * 100 + "%");
    }
}
}