Java基础知识之 java Applet 小训练

news2024/9/22 1:08:02


import java.applet.Applet;
import java.awt.*;
import java.util.Random;

import static java.lang.Math.cos;
import static java.lang.Math.sin;

public class HelloWorldApplet extends Applet {
    public void paint(Graphics g) {
        // 将Graphics对象转换为Graphics2D类型
        java.awt.Graphics2D g2d = (java.awt.Graphics2D) g;

        // 设置线的粗细为5像素
        g2d.setStroke(new BasicStroke(2));


        double Q = 0;
        double[] x = new double[24];
        double[] y = new double[24];
        double x0 = 300;
        double y0 = 300;
        double r = 250;
        for (int i = 0; i < 24; i++) {
            x[i] = x0 + r * cos(Q);
            y[i] = y0 + r * sin(Q);
            Q += 15;
        }

        g2d.setColor(generateRandomColor());
        for (int i = 0; i <24 - 1 ; i++) {
            for (int j = i+1; j <24 ; j++) {
                g2d.drawLine((int)x[i], (int)y[i], (int)x[j], (int)y[j]);
            }

        }
    }
    public static Color generateRandomColor() {
        Random random = new Random();
        int red = random.nextInt(256);    // 生成0到255之间的随机整数
        int green = random.nextInt(256);
        int blue = random.nextInt(256);
        Color randomColor = new Color(red, green, blue);
        return randomColor;
    }
}

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>HelloWorldApplet</title>
</head>
<body>
<applet code = "HelloWorldApplet.class" width="600" height="800"></applet>
</body>
</html>

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