public class FloorTest {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		double val = 1.5;
		
		double ret1 = Math.floor(val);
		System.out.println(ret1);
		
		double ret2 = Math.floor(-val);
		System.out.println(ret2);
		
		double ret3 = Math.ceil(val);
		System.out.println(ret3);

		double ret4 = Math.ceil(-val);
		System.out.println(ret4);
		
		double ret5 = Math.round(val);
		System.out.println(ret5);

		double ret6 = Math.round(-val);
		System.out.println(ret6);
	}

}