001package bradleyross.demonstrations; 002/** 003 * Some demonstrations of the results of passing objects in 004 * the parameter lists of methods. 005 * @author Bradley Ross 006 * 007 */ 008public class ArrayDemos implements Runnable { 009 int[] a = new int[]{0, 1, 2, 3, 4, 5}; 010 public void run() { 011 int[] array = a.clone(); 012 System.out.println("Value of element 2 before call to changeElement is " + Integer.toString(array[2])); 013 changeElement(array, 2, 6); 014 System.out.println("Value of element 2 after call to changeElement is " + Integer.toString(array[2])); 015 int a = 24; 016 System.out.println("Value before call to changeValue is " + Integer.toString(a)); 017 changeValue(a, 10); 018 System.out.println("Value after call to changeValue is " + Integer.toString(a)); 019 } 020 private void changeValue(int a, int newValue) { 021 System.out.println("changeValue: starting value is " + Integer.toString(a)); 022 a = newValue; 023 System.out.println("changeValue: final value is " + Integer.toString(a)); 024 } 025 private void changeElement(int[] array, int position, int newValue) { 026 array[position] = newValue; 027 System.out.println("Within method changeElement position " + Integer.toString(position) + 028 " changed to " + Integer.toString(newValue)); 029 } 030 public static void main(String[] args) { 031 System.out.println("Starting program"); 032 ArrayDemos instance = new ArrayDemos(); 033 instance.run(); 034 } 035}