How to remove ticking noise and doing audio effects?

Question

I have a snippet of code I got for generating delay effects. After editing the appropriate things, I ran the application. It produces delays but (if i hear it correctly), the delayed sounds do not fade. It sounds like a mix of sounds. Does it depend on feedback? And there's this ticking noise accompanying the output. I just want to know how "ticking sounds" are produced (and probably how to remove them) and how to produce a correct delay.Here's my program.
public void delayProcessor(double[] data, int sampleRate, int delayInMs){
        //initialization
        int delayOffset = (int) ((delayInMs * sampleRate * 1) / 1000);
        double[] buffer = data;
        int k = 0;
        delayBufferSize = data.length + delayOffset;
        delayBuffer = new double[delayBufferSize];
        // Index where dry sample is written
        writeIndex = 0;
        // Index where wet sample is read
        readIndex = data.length;
        for (int i=0; i < data.length; i++)
            double inputSample =  data;
double delaySample = delayBuffer[readIndex++];
double outputSample = (inputSample * dryLevel) + (delaySample * wetLevel);
// make sure output is in range
if (outputSample > 1)
outputSample = 1;
else if (outputSample < -1)
outputSample = -1;
// Store in output sample
data[i] = outputSample;
// Calculate feedback
inputSample += (delaySample * feedbackLevel);
// make sure input is in range
if (inputSample > 1)
inputSample = 1;
else if (inputSample < -1)
inputSample = -1;
delayBuffer[writeIndex] = inputSample;
writeIndex++;
// Update indices
readIndex %= delayBufferSize;
writeIndex %= delayBufferSize;
My sample rate depends on the user's desired setting but I'm currently testing on 11025. It's also mono, 16-bits if that information helps.
Thanks in advance! :D                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

Answer 1

Hi. Updated my code from the one above to this:
public void echoProcessor(double[] samples, double decay, int sampleRate){
     int delayOffset = (int) (10 * sampleRate)/1000;
     int delayBufferSize = samples.length + delayOffset;
     double[] delayBuffer = new delayBuffer[delayBufferSize];
     int writeIndex = 0, readIndex = delayOffset;
     int i =0;
     for(i = 0; i < delayBufferSize; i++)
          delayBuffer[i] = 0;
     for(i = 0; i < samples.length; i++){     
          double oldSample = samples;
          double delay = delayBuffer[readIndex];
          double newSample = oldSample + (decay * delay);
          delayBuffer[writeIndex] = outputSample;
          readIndex++;
          writeIndex++;
          if(readIndex == delayBufferSize)
               readIndex = 0;
But I still get the continuous ticking sound but now I hear the sound output which somehow produces an echo.
The double[] samples has a length of 512 then I convert it to bytes before writing to the SourceDataLine. Any ideas?