how to include sound in java

i have made a jar program that need to run an audio file this is how i open the audio file(not in jar file)

Thread sound = new Thread(){
                public void run(){
                        MakeSound.playSound("Raef.wav");
                }
        };

i run it with

sound.start();

and end it with

sound.stop();

when i run it on blue j its worked but the sound isnt play on the jar files can someone solve this ? i need to make a program with jar