Problems displaying custom JComponent. What to do?

Question

Java

I tried to create my own JImage class that inherits JComponent and contains an image. The application window starts, but the picture itself is not visible. Code below.

Main class:

public class Test {
 public static void main(String[] args) {
  Window window = new Window();
 }
}

Framed class:

public class Window extends JFrame {
 public Window() {
  setSize(1000,500);
  setLayout(null);
  setVisible(true);
  setDefaultCloseOperation(EXIT_ON_CLOSE);
 
  JImage img = new JImage();
  img.setLayout(null);
  img.setSize(100, 100);
  img.setLocation(100,100);
  img.setImage("img.png");
  img.setVisible(true);
 
  add(img);
 }
}

Class with component:

public class JImage extends JComponent {
 Image img;
 
 public JImage () {}
 
 @Override
 protected void paintComponent(Graphics g) {
  super.paintComponent(g);
  g.drawImage(getImage(), getLocation().x, getLocation().y, getSize().width, getSize().height, null);
 }
 
 void setImage(String filePath) {
  try {
   this.img = ImageIO.read(new File(filePath));
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
 
 Image getImage() {
  return this.img;
 }
}

Please help me to solve this problem. Thanks in advance.

PS The file with the picture exists, I checked it in the explorer at the root of the project, I checked it through exists (new File (filePath))

Answer 1

added JLabel and ImageIcon between frame and jImage:
visible

import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.net.URL;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;


public class ImageEx extends JFrame {

  public ImageEx() {

    this.setLayout(new FlowLayout());
    this.setSize(200, 200);
    JLabel label = new JLabel();
    JImage img = new JImage();
    img.setImage("http://www.java2s.com/style/download.png");
    label.setIcon(new ImageIcon(img.getImage()));
    this.add(label);
    this.setVisible(true);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }

  private static class JImage extends JComponent {
    BufferedImage img;

    public JImage() {
    }

    @Override
    protected void paintComponent(Graphics g) {
      super.paintComponent(g);
      g.drawImage(getImage(), getLocation().x, getLocation().y, getSize().width,
          getSize().height, null);
    }

    void setImage(String url) {
      try {
        this.img = ImageIO.read(new URL(url));
      } catch (Exception e) {
        e.printStackTrace();
      }
    }

    BufferedImage getImage() {
      return this.img;
    }
  }

  public static void main(String avg[]) throws Exception {
    ImageEx o = new ImageEx();
  }
}