swap3.txt

java的一经典教程

public class Swap3
{
  public static void main(String[] args)
   {
		// declare and initialise variables

		int a1 = 7;
		int a2 = 9;
		int a3 = 13;

		// Write out initial values

		System.out.println("Before the swap...");
		System.out.println("a1 has value " + a1);
		System.out.println("a2 has value " + a2);
		System.out.println("a3 has value " + a3);

		// swap values

		int temp;
		// temporary variable to facilitate the swap

		temp = a3;
		a3 = a2;
		a2 = a1;
		a1 = temp;

		// Write out new values

		System.out.println("After the swap...");
		System.out.println("a1 has value " + a1);
		System.out.println("a2 has value " + a2);
		System.out.println("a3 has value " + a3);
	}
}