JAva错误无法转换为JAva.applet.applet

我试图用java制作一个幻灯片。我尝试过使用几种不同的方法显示图像，包括缓冲图像、GImage和ImageIcon/JLabel。我想能够删除图片时，空格键被击中，以便我可以显示一些文字以及这就是为什么我离开缓冲图像。我现在正在使用ImageIcon/JLabel，但我遇到了一个错误。有人能帮我解决这个错误吗

import java.applet.Applet;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.image.*;
import java.io.*;
import java.net.URL;
import javax.imageio.*;
import java.awt.Color;
import acm.graphics.*;
import acm.program.*;
import java.awt.event.*;
import acm.util.*;
import java.util.Random;
import javax.swing.*;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.event.ChangeEvent;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;

public class firstSlide extends Applet {

    private BufferedImage img;
    private static final int IMG_WIDTH = 50;
    private static final int IMG_HEIGHT = 50;
    private Image picture;
    private double scalefactor;
    GLabel text;

    public void init() {
        setBackground(Color.BLACK);
        getMouseListeners();
        getKeyListeners();
        try {
            URL url = new URL(getCodeBase(), "/home/rylie/Pictures/Capstone/HockeyPlayer.jpg");
            img = ImageIO.read(url);
        } catch (IOException e) {
        }
        String filename = this.getParameter("/home/rylie/Pictures/Capstone/HockeyPlayer.jpg");
        if (filename != null) {
            this.picture = this.getImage(getDocumentBase(), filename);
        }
        try {
            scalefactor = Double.valueOf(this.getParameter("scalefactor")).doubleValue();
        } catch (Exception e) {
            this.scalefactor = 1.0;
        }
    }

    public void paint(Graphics g) {
        g.drawImage(img, 90, 55, img.getWidth(this) / 2, img.getHeight(this) / 2, this);
    }

    public Dimension getPreferredSize() {
        if (img == null) {
            return new Dimension(50, 50);
        } else {
            return new Dimension(IMG_WIDTH, IMG_HEIGHT);
        }
    }

    public void stateChanged(ChangeEvent e) {
        Graphics g = img.getGraphics();
        g.setColor(Color.black);
        g.fillRect(0, 0, img.getWidth(null), img.getHeight(null));
        g.dispose();
        repaint();
    }

    public void keyPressed(KeyEvent k) {
        int key = k.getKeyCode();
        if (key == KeyEvent.VK_W) {
            stateChanged(null);
            text = new GLabel("This picture has been influenced by being open to growth. I have had to become much more open to growth through my hockey experience. When I first came to Regis, I was not very good at hockey. I had to be open and willing to change in order to get better. I had to trust that my coach was telling me the correct plays. By trusting my coach and being open to growth, I was able to improve a lot. I was able to be apart of the State Championship Varsity Tier II Hockey Team. Hockey has effected my Regis carrer as it has fiven me something to strive to get better in and helped me meet people who could be there for me in times of need.");
            text.setColor(Color.RED);
            Graphics g = img.getGraphics();
            g.setColor(Color.BLACK);
            g.fillRect(0, 0, img.getWidth(null), img.getHeight(null));
            g.dispose();
            repaint();
            this.setVisible(false);
        }
    }
}

原始代码

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Toolkit;
import acm.graphics.*;
import acm.program.*;
import java.awt.event.*;
import acm.util.*;
import java.util.Random;
import javax.swing.*;
import java.awt.image.*;
import java.awt.Image;
import acm.graphics.GImage;

import acm.graphics.GObject;

public class test extends JFrame {

    ImageIcon hockeyPlayer = new ImageIcon("/home/rylie/Pictures/Capstone/HockeyPlayer.jpg");

    public void init() {
        Image hockey = hockeyPlayer.getImage();
        Image player = hockey.getScaledInstance(120, 120, java.awt.Image.SCALE_SMOOTH);
        hockeyPlayer = new ImageIcon(player);;
        JLabel pic = new JLabel();
        pic.setIcon(hockeyPlayer);
        add(pic, 0, 0);
        Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
        int one = (dim.width);
        int two = (dim.height);
        setLocation(one, two);
        setSize(dim.width, dim.height);
    }
}

（新守则）

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请发布代码以找出问题所在。是否尝试将

测试作为小程序加载？因为那是impossible@MadProgrammer一针见血。我还注意到针对学生的
acm
软件包的使用，这让我想问。。1） 为什么要编写小程序？如果是老师指定的，请参考。2） 为什么要使用AWT？有关放弃AWT组件而支持Swing的许多好理由，请参阅。
 java.lang.ClassCastException: test cannot be cast to java.applet.Applet     
     at sun.applet.AppletPanel.createApplet(AppletPanel.java:793)
     at sun.applet.AppletPanel.runLoader(AppletPanel.java:722)     
     at sun.applet.AppletPanel.run(AppletPanel.java:379)
     at java.lang.Thread.run(Thread.java:744)" (error)