我正在尝试输出一个数学函数,但我不知道如何调用我的类来绘制/计算该函数。在主课中,我尝试了以下public class GraphingProgram {public static void main(String[] args) { Applet program = new Applet(); program.setSize(300, 400); program.setName("Graphing Program"); GraphApplet testFunction = new GraphApplet(); program.add(testFunction); program.setVisible(true); } 班级代码public class GraphApplet extends Applet{ double f(double x) { return (Math.cos(x/5) + Math.sin(x/7) + 2) * getSize().height/ 4; } public void paint (Graphics g) { for(int x = 0; x< getSize().width; x++) g.drawLine(x, (int) f(x), x+1, (int) f(x+1)); } public String getAppletInfo() { return "Draw a function graph"; } }执行程序时,我们应该期望看到类的函数图。例如,我应该能够在给定的间隔上输出图形 f(x) = cos(x/5) + sin(x/7) + 2,如下所示!https://i.imgur.com/przHRk6.png
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