leapyear.java

JAVA编程思想源代码 值得一下 很难找的

package chapter4;

public class LeapYear {

	public static void main(String[] args) {
		int year = 1989; // 进行判断的方法一
		if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
			System.out.println(year + " is a leap year.");
		else
			System.out.println(year + " is not a leap year.");
		year = 1100; // 进行判断的方法二
		boolean leap;
		if (year % 4 != 0)
			leap = false;
		else if (year % 100 != 0)
			leap = true;
		else if (year % 400 != 0)
			leap = false;
		else
			leap = true;
		if (leap == true)
			System.out.println(year + " is a leap year.");
		else
			System.out.println(year + " is not a leap year.");
		year = 2040; // 判断的方法三
		if (year % 4 == 0) {
			if (year % 100 == 0) {
				if (year % 400 == 0)
					leap = true;
				else
					leap = false;
			} else
				leap = true;
		} else
			leap = false;
		if (leap == true)
			System.out.println(year + " is a leap year.");
		else
			System.out.println(year + " is not a leap year.");
	}
}