// CSE 142 Lecture 17
// Arrays for Tallying
// This program demonstrates array reference semantics

import java.util.*; // For Arrays

public class ArraySwap {
	public static void main(String[] args) {
		int[] a = {1, 2, 3};
		int[] b = {4, 5, 6};
		System.out.println("a: " + Arrays.toString(a) + ", b: " + Arrays.toString(b));
		swapAll(a, b);
		System.out.println("a: " + Arrays.toString(a) + ", b: " + Arrays.toString(b));
	}
	
	// Swap the contents of two arrays.
	// Why doesn't the following code work?
	// int[] temp = first;
	// first = second;
	// second = temp;
	// Can we write this method for arrays with different lengths?
	public static void swapAll(int[] first, int[] second) {
		for (int i = 0; i < first.length; i++) {
			int temp = first[i];
			first[i] = second[i];
			second[i] = temp;
		}
	}
}