Audio Format in java

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Java

Windows

Win7

audio

I have a problem because my Speech recognition tool kit need to use sound in 16Khz mono .wav format to work. but my microphone is
44.100 KHz and stereo format. and it's don't have 16khz mono format in microphone setting.
I try to use java to convert this wave file. but when i convert sound

//My Input wave File 
AudioFormat audioFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,44100. 0F, 16, 2, 4, 44100.0F, false);

encoding - PCM_Signed 
sampleRate - 44.1 KHz 
sampleSizeInBits - 16 
channels - Stereo 
frameSize - 4 
frameRate - 44100 
bigEndian - false 

to

// Wave file format that i want 
samplerate : 16 Khz
channels : mono 

It have an error code like this

Exception in thread "Thread-5" java.lang.IllegalArgumentException: Unsupported conversion: PCM_SIGNED 16000.0 Hz, 16 bit, mono, 2 bytes/frame, little-endian from PCM_SIGNED 44100.0 Hz, 16 bit, stereo, 4 bytes/frame, little-endian

at javax.sound.sampled.AudioSystem.getAudioInputStrea m(Unknown Source)

at Recorder.run(Recorder.java:73)

I try to use code in java like this

//My Source code

File inputfile = new File("test.wav");

AudioFormat xx = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,16000. 0F, 16, 1, 2, 16000.0F, false);
m2_audioInputStream = AudioSystem.getAudioInputStream(xx, m_audioInputStream);

but It can't work

I try to find a lot of solutions in Internet but it seem can't solve my problem . So It will be very kindness if you tell me how can I convert this wave file.
by using java.

Than you a lot for your help.