/*
    This shows some simple uses of a for() loop.
    This second example passes an array reference to a method, prints out values 
    and creates a new array. Note that after the method returns 
    the old values are printed out since the creation of a new array object 
    doesn't effect the contents of the initial reference
*/


public class arraymodifier_v2 {
  public static void main(String args[]) {
    
    // Create and initialize an integer array
    int[] intarray = {8, 12, -3, 5};

    // Call the arraymod method
    // Note that the intarray reference is used as a parameter
    arraymod(intarray);
    
    // This for loop prints out all the values in the intarray array.
    // Note that the values have not been modified by the arraymod method
    
    for(int i=0 ; i<intarray.length ; i++) {
      System.out.println("Value of int value intarray[" + i + "] is " + intarray[i]);
    }
  }
  
  // The arraymod method receives an array reference as a parameter. 
  // Note that the method can only determine the length of the array by using 
  // testarray.length
  public static void arraymod(int[] testarray)
  {
    for(int i=0 ; i<testarray.length; i++) {
      System.out.println("Value of int value testarray[" + i + "] is " + testarray[i]);      
    } 
    
    // This next line creates a new array object and assigns the reference of the object
    // to the testarray reference. This action overwrites the reference sent to the method
    // from the main method. Note that when the method ends, the testarray reference is lost and
    // the object it references is garbage collected.

    testarray = new int[testarray.length];
    testarray[0] = 9;
    testarray[1] = 16;
    testarray[2] = -25;
    testarray[3] = 2;
  }
  
}