VarEx2.java

class VarEx2 {
	public static void main(String[] args) {
		int x =10, y=20;
		int tmp =0;
		
		System.out.println("x:"+x+"y"+y);
		
		tmp =x;
		x=y;
		y=tmp;
		
		System.out.println("x:"+x+"y"+y);
	}
}