Frame23.java

package lesson2;

public class Frame23 {

	public static void main(String[] args) {
		
		System.out.println(isSpring(-2));
		System.out.println(isSpring(2));
		System.out.println(isSpring(6));
		System.out.println(isSpring(5));
	}
	
	static int isSpring(int month) {
		
		if (month == 3 || month == 4 || month == 5){
			return 1;
		}
		if (month <=0 || month > 12){
			return -1;
		}
		return 0;
	}
}