如何知道当月的一周特定日期（包括）

Question

如何知道当月（包括）当月剩余的一周中的特定日期 例如今天是2015年4月14日： 本周有几天到月底： Mondays = 2的数量 Tuesdays = 3的数量 Wednesdays = 3的数量 Thursdays = 3的数量 Fridays = 2的数量 Saturdays = 2的数量 Sundays = 2

的数量

Answer 1

这是我使用Java 8 public static void getDaysLeftInMonth() { LocalDate endOfMonth = LocalDate.now().with(TemporalAdjusters.lastDayOfMonth()); DayOfWeek[] daysOfWeek = DayOfWeek.values(); for (int i = 0; i < daysOfWeek.length; i++) { int numberOfWeekDaysLeftInMonth = 0; LocalDate now = LocalDate.now(); while (now.with(TemporalAdjusters.next(daysOfWeek[i])).isBefore(endOfMonth) || now.with(TemporalAdjusters.next(daysOfWeek[i])).isEqual(endOfMonth)) { numberOfWeekDaysLeftInMonth++; now = now.plusWeeks(1); } System.out.printf("%d %sS left\n", numberOfWeekDaysLeftInMonth, daysOfWeek[i].name()); } } API快速解决的解决方案。你需要对此进行单元测试：

 public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void LoadNames(object sender, EventArgs e)
    {
        const int size = 200;
        string[] names = new string[size];
        string[] names1 = new string[size];
        int index = 0;
        int index1 = 0;
        StreamReader inputfile1;
        StreamReader inputfile2;
        inputfile1 = File.OpenText(@"F:\C# HW\CH07_HW_07\BoysNames.txt");
        inputfile2 = File.OpenText(@"F:\C# HW\CH07_HW_07\GirlsNames.txt");
        while (!inputfile1.EndOfStream && index < names.Length)
        {
            names[index] = inputfile1.ReadLine();
            index++;
        }
        while (!inputfile2.EndOfStream && index1 < names1.Length)
        {
            names1[index1] = inputfile2.ReadLine();
            index1++;
        }
    }
    private Boolean FindBoyname()
    {
        const int size = 200;
        string[] BoyNames = new string[size];
        int index = 0;
        string boyname = textBox1.Text;
        Boolean Boyname = false;

        StreamReader inputfile1;
        inputfile1 = File.OpenText(@"F:\C# HW\CH07_HW_07\BoysNames.txt");
        while (!inputfile1.EndOfStream && index < BoyNames.Length)
        {
            BoyNames[index] = inputfile1.ReadLine();
            if (String.Equals(boyname, BoyNames[index], StringComparison.OrdinalIgnoreCase) == true)
            {
                Boyname = true;
            }
            index++;
        }
        return Boyname;
    }
    private Boolean FindGirlname()
    {
        const int size = 200;
        string[] GirlNames = new string[size];
        int index = 0;
        string girlname = textBox2.Text;
        Boolean Girlname = false;

        StreamReader inputfile1;
        inputfile1 = File.OpenText(@"F:\C# HW\CH07_HW_07\GirlsNames.txt");
        while (!inputfile1.EndOfStream && index < GirlNames.Length)
        {
            GirlNames[index] = inputfile1.ReadLine();
            if (String.Equals(girlname, GirlNames[index], StringComparison.OrdinalIgnoreCase) == true)
            {
                Girlname = true;
            }
            index++;
        }
        return Girlname;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        Boolean boy;
        Boolean girl;
        boy = FindBoyname();
        girl = FindGirlname();
        if (boy.Equals(true))
        {
            MessageBox.Show(textBox1.Text + " is among the most popular boy names!");
        }
        if (boy.Equals(false))
        {
            MessageBox.Show(textBox1.Text + " is not among the most popular boy names.");
        }
        if (girl.Equals(true))
        {
            MessageBox.Show(textBox2.Text + " is among the most popular girl names!");
        }
        if (girl.Equals(false))
        {
            MessageBox.Show(textBox2.Text + " is not among the most popular girl names.");
        }
    }
}

Answer 2

真的非常感谢罗伯特。我只是稍微改了一下

public static void getDaysLeftInMonth() {
   LocalDate today =  new LocalDate("2015-04-22");
   LocalDate endOfMonth = today.dayOfMonth().withMaximumValue();;

    for (int i = 1; i <= 7; i++) {
        int numberOfWeekDaysLeftInMonth = 0;
        LocalDate now = today;
        LocalDate checkedDay = null;
        while ((checkedDay = now.withDayOfWeek(i)).isBefore(endOfMonth.plusDays(1)) ) {
            if (checkedDay.isAfter(today.minusDays(1))) {
                numberOfWeekDaysLeftInMonth++;
            }
            now = now.plusWeeks(1);
        }

        Log.d("TIME", String.format("%d - %d left\n",  i, numberOfWeekDaysLeftInMonth));
    }

}