java - 简单的 Java 数学小程序

Question

我如何创建一个应用程序可以显示作为参数提交的数字的平方根吗？到目前为止我已经:

import java.awt.*;

public class RootApplet extends javax.swing.JApplet {
int number; 

public void init() {
number = 225;
}

public void paint(Graphics screen) {
Graphics2D screen2D = (Graphics2D) screen; 
screen2D.drawString("The square root of " + arguments[0] +

" is"
Math.sqrt(number));
}
}

但是根据运行时错误，我显然遗漏了一些东西。 `错误。

Answer 1

您的绘制方法不正确。将其替换为下面的内容。 drawString 接受三个参数String、x pos、y pos

@Override
public void paint(Graphics screen) {
    Graphics2D screen2D = (Graphics2D) screen;
    screen2D.drawString("The square root of "+number+" - "+(int) Math
            .sqrt(number),10,10);
}