JAVA 매소드화

public class 인스턴스 {

public static void avg(int left, int right) {
	System.out.println((left + right) / 2);
}

public static void sum(int left, int right) {
	System.out.println(left + right);
}

public static void main(String[] args) {
	int left, right;
	
	left= 10;
	right = 20;
	
	sum(left, right);
	avg(left, right);
	
	left= 20;
	right = 30;
	
	sum(left, right);
	avg(left, right);
}

}