LWJGL comes with OpenAL. You can look on the wiki
under the OpenAL section for some tutorials to get you started. From the tutorial:
This is all you would need to play the sound (after loading and buffering of course). You can stop or pause it at any time.
You can also use paulscode 3D sound system
to easily play sounds in 3D space (though it can also be used for 2D games too!) As noted by the previous posters, .wav is an uncompressed, lossless format and as a result is very large. .ogg would be a better option.