Thread: Error with code to implement sound

Hi,

I'm trying to implement sound into my program. I want it so when a button is clicked the sound will play however i seem to be getting an unusual error when i'm importing sound utilities and the same error appears when i'm writing the code to do with the sound.

import sun.audio.AudioData;
import sun.audio.AudioPlayer;
import sun.audio.AudioStream;

The error that appears for each is:
"Access restriction: The type AudioData is not accessible due to restriction on required library C:\Program Files\Java\jre7\lib\rt.jar"
"Access restriction: The type AudioPlayer is not accessible due to restriction on required library C:\Program Files\Java\jre7\lib\rt.jar"
"Access restriction: The type AudioStream is not accessible due to restriction on required library C:\Program Files\Java\jre7\lib\rt.jar"

Hope somebody as an idea as to what it could mean and i how i could resolve this.

Thank you for reading,
Luke.