Greenfoot: Play and Stop Sound Code

In this article, we will explore how to improve the code in Greenfoot by using a boolean field to remember if an object is actually down at the moment. This will make the image setting more efficient and reduce unnecessary CPU resources.

One of the main issues with the current code is that it sets the image to itself repeatedly, even when there is no change. This can be improved by only setting the image when it actually changes. Another reason for this improvement is that adding sound effects will make a big difference if the sound is played once or repeatedly.

To fix this problem, we need to add a boolean field to the Key class to keep track of whether the object is down or not. We can then use this field to determine when to set the image. When the 'g' key is pressed, the musical keyboard key should switch to the picture of it down.

Here's an example code snippet that demonstrates how to achieve this:

```java

// In the act method of the Key class

if (isDown) {

setImage('white-key-down.png');

} else {

setImage('white-key.png');

}

```

In this code, we check if the `isDown` boolean field is true. If it is, we set the image to 'white-key-down.png', otherwise we set it to 'white-key.png'. This way, the image will only be set when there is a change.

By implementing this improvement, we can reduce unnecessary CPU resources and make our code more efficient. Additionally, when we add sound effects later on, we can ensure that they are played correctly and efficiently.

Overall, improving the code in Greenfoot by using a boolean field to remember if an object is actually down at the moment is a great way to optimize our program and make it more efficient.

Greenfoot play and stop sound code