初学java，不知道这个代码怎么错了

Question

import java.net.URL;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class FishFrame extends JFrame implements Runnable {
JPanel panel;
JLabel label;

public FishFrame() {
    super();
    getContentPane().setLayout(null);
    setBounds(100, 100, 340, 190);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    panel.setLayout(null);
    panel.setBounds(0, 0, 337, 159);    
    getContentPane().add(panel);

    URL url = getClass().getResource("1.png");
    ImageIcon imageIcon = new ImageIcon(url);
    label.setIcon(imageIcon);
    label.setBounds(271, 47, 66, 60);
    panel.add(label);
    Thread thread = new Thread();
    thread.start();
}

public static void main(String[] args) {
    FishFrame frame = new FishFrame();
    frame.setVisible(true);

}

@Override
public void run() {
    while (true) {
        int lx = label.getX() - 1;
        if (label.getX() - 1 > panel.getX()) {
            label.setLocation(lx, getY());
        } else {
            label.setBounds(271, 47, 66, 60);
        }
        try {
            Thread.sleep(50);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}

}

Answer 1

看下编译器报了什么错误。
资源有没有读到。