"Cannot instantiate the Type Main"

Question

I keep getting this error every time I create a new object with the class name: "Cannot instantiate the Type Main" This is the code: ``` import javax.swing.*; import java.util.Scanner; import java.applet.Applet; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.awt.geom.Ellipse2D; public abstract class Main extends JPanel implements ActionListener, KeyListener{ Timer t = new Timer(5, this); double x = 0, y = 0, velX = 0, velY = 0; public Main() { t.start(); addKeyListener(this); setFocusable(true); setFocusTraversalKeysEnabled(false); } public void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2 = (Graphics2D) g; g2.fill(new Ellipse2D.Double(x, y, 40, 40)); } public void actionPerformed(ActionEvent e) { repaint(); x += velX; y += velY; } public void up() { velY = -1.5; velX = 0; } public void down() { velY = -1.5; velX = 0; } public void left() {…

Accepted Answer

You can't instantiate abstract classes in java, Your `Main` class is abstract, make it a concrete Class, since it seems you have all the functionalists and no need to declare it as abstract class.

```
public class Main extends JPanel implements ActionListener, KeyListener { } //abstract keyword removed
```

Consider using abstract classes if any of these statements apply to your situation:

- You want to share code among several closely related classes.

- You expect that classes that extend your abstract class have many common methods or fields, or require access modifiers other than public (such as protected and private).

- You want to declare non-static or non-final fields. This enables you to define methods that can access and modify the state of the object to which they belong.

"Cannot instantiate the Type Main"

Solution

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