stack 을 활용한 swap

import java.util.Stack;

public class swap_stack {

public static void main(String[] args) {

// TODO Auto-generated method stub

Stack st = new Stack();

int xData = 10;

int yData = 11;

System.out.printf("xData => %d   yData => %d\n", xData, yData);

st.push(xData);

st.push(yData);

xData = (int) st.pop();

yData = (int) st.pop();

System.out.printf("xData => %d   yData => %d\n", xData, yData);

}

}