Untitled

Here's a simple Java Swing example that creates a button. When clicked, it shows a white box with a 25% chance of it being black instead. 

```java
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;

public class ColorBoxExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Color Box Example");
        JButton button = new JButton("Click Me");
        
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                Random random = new Random();
                Color boxColor = random.nextInt(4) == 0 ? Color.BLACK : Color.WHITE; // 25% chance for black
                showColorBox(boxColor);
            }
        });

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 200);
        frame.setLayout(new FlowLayout());
        frame.add(button);
        frame.setVisible(true);
    }

    private static void showColorBox(Color color) {
        JFrame boxFrame = new JFrame();
        boxFrame.setSize(100, 100);
        boxFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        boxFrame.getContentPane().setBackground(color);
        boxFrame.setVisible(true);
    }
}
```

### Explanation:
1. **JFrame**: The main window.
2. **JButton**: A button that triggers the action.
3. **ActionListener**: An event handler for button clicks.
4. **Random**: Used to generate a random number for determining the color.
5. **showColorBox**: A method that creates a new window with the chosen color.

You can run this code in any Java development environment. When you click the button, it will pop up a box that is either white or black based on the specified probability.