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我正在关注"Java的艺术与科学"一书,它展示了如何计算闰年.本书使用ACM Java Task Force的库.

这是书籍使用的代码:

import acm.program.*;

public class LeapYear extends ConsoleProgram {
    public void run()
    {

        println("This program calculates leap year.");
        int year = readInt("Enter the year: ");     

        boolean isLeapYear = ((year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0));

        if (isLeapYear)
        {
            println(year + " is a leap year.");
        } else
            println(year + " is not a leap year.");
    }

}

现在,这就是我计算闰年的方法.

import acm.program.*;

public class LeapYear extends ConsoleProgram { …