[3] 값 교체하기

package day003;

public class day00301값교체하기 {

	public static void main(String[] args) {

			int x = 10;
			int y= 20;
			
			int z = x;
			x = y;
			y = z;
					
					System.out.println(" x = " + x);
					System.out.println(" y = " + y);
					
			
	}

}