Java parameter value changes itself -

Today, while writing a simple program, I found some weird behavior. I have written a simple sorting method that gives an array of another array.

  public double [] sortime (double [] array) {double] narray = new double [array.length]; Narray = array; For (int i = 0; i & lt; narray.length; i ++) {for (int j = 0; j & lt; narray.length; j ++) {if (narray [i] & lt; Narray [j]) {double temp = narray [i]; narray [i] = narray [ja]; Narray [ja] temporary =; }}} / TODO automatically returns the generated method stub; }   
 In my driver class, when I told this sort my method, it also updated my test diagram as testArray is out of scope for sortmeme method, then when test array Has been sorted?  
  double [] testArray = {3, 6, 2, 5, 8, 4, 1, 7}; Double [] results; Results = Apestorts (testers); Af.printMe (results);    
 
 
 In your  sorting  method, you specify the context Using  array  to  narrey  using  narray = array; .  
 This means that  narrey  is pointing the same code as  array , and so if you go to  narrey  If you modify, then the array is also changed and because the method has the reference to  testArray  in the array,  testArray  is also sorted.  
 If you do not want to change the testArray, use  system.arraycopy ()  while specifying  array  to  narre .  narre  to copy the values ​​of  array . Change it as shown below.  
  System Arrayopy (array, 0, array, 0, array. Length);