Java实例-输入年月日完成以下判断

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完成以下要求
1：判断是否输入正确
2：判断输入的日期为星期几
3：判断输入的日期距离输入的第二个日期有多少天
4：判断输入日期的年龄
代码实现

package com.minrisoft;import java.lang.String; import java.util.Scanner;public class Demo {  public static void calcWeek(int a,int b,int c){//判断星期几        int x = a,y = b,z = c;        if(b == 1){            b = 13;            a =a - 1;            }        if(b ==12){            b = 14;            a = a - 1;         }        int h = (int) ((c + (26 * (b + 1) / 10) + (a % 100) + ((a % 100) / 4) + ((a / 100) / 4) + 5 * (a / 100)) % 7);         switch (h) {         case 0:         System.out.println(x + "年" + y + "月" + z + "日:星期六");         break;         case 1:         System.out.println(x + "年" + y + "月" + z + "日:星期天");         break;         case 2:         System.out.println(x + "年" + y + "月" + z + "日:星期一");         break;         case 3:         System.out.println(x + "年" + y + "月" + z + "日:星期二");         break;         case 4:         System.out.println(x + "年" + y + "月" + z + "日:星期三");         break;         case 5:         System.out.println(x + "年" + y + "月" + z + "日:星期四");         break;         case 6:         System.out.println(x + "年" + y + "月" + z + "日:星期五");         break;        }    }  public static boolean leapYear(int y){//判断闰年        if (y % 400 == 0 || (y % 4 == 0 && y % 100 != 0))            return true;        else            return false;    }  public static int countDay(int y, int m, int d){//计算天数        int month_1[] ={ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };        int month_2[] ={ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };        int count = 0;        do {            count += 365;            if (leapYear(y) == true)                count += 1;        }while((--y)!= 0);        do{            if (leapYear(y) == true)                count += month_1[m-1];            else                count += month_2[m-1];        }while ((--m)!= 0);        count += d;        return count;}  public static void Ture_or_False(int x,int y,int z){//判断输入的日期是否正确      if (y >= 1 && y <= 12 && z >= 1 && z <= 31){            if (y == 4 || y == 6 || y == 9 || y == 11){//当月份为4，6，9，11时                if (z > 30){                    System.out.println("输入错误");                    System.out.println(">-----------------------------<");                    System.exit(0);                }            }            if (y == 2){//当月份为2时                if (leapYear(y) == true){                    if (z > 29){                        System.out.println("输入错误");                        System.out.println(">-----------------------------<");                        System.exit(0);                    }                }                else{                    if (z > 28){                        System.out.println("输入错误");                        System.out.println(">-----------------------------<");                        System.exit(0);                    }                }            }        }        else{            System.out.println("输入错误");            System.out.println(">-----------------------------<");            System.exit(0);        }         System.out.println(x + "年" + y + "月" + z + "日:输入正确");  }  public static void sumday(int y1,int y2,int x,int y,int z,int i,int j,int k){//判断输入的日期距离某天（输入的第二个日期）的天数       if (y1 == y2)            System.out.println(x + "年" + y + "月" + z + "日:处于今天");        if (y1 < y2)            System.out.println(x + "年" + y + "月" + z + "日距离"+i + "年" + j + "月" + k + "有" + (y2 - y1) + "天");        if (y1 > y2){            System.out.println(x + "年" + y + "月" + z + "日距离"+i + "年" + j + "月" + k + "有" + (y1 - y2) + "天");            }    }  public static void ages(int y1,int y2,int x,int y,int z){//判断年龄        if (y1 > y2){            System.out.println(x + "年" + y + "月" + z + "日:没有出生");            }           else{                int a = 2017 - x;                if (y > 4 || (x != 2017 && y == 4 && z > 10))                    a -= 1;                System.out.println(x + "年" + y +"月" +z +"日:今年"+ a + "岁");            }  }  public static void main(String [] args){      Scanner sc = new Scanner(System.in);        System.out.print("请输入第一个日期（格式：yymmdd）:");        String y_m_d_1 = sc.nextLine();        System.out.println("请输入第二个日期（格式：yymmdd）");        System.out.print("注意：保证在第一次输入的日期之后:");        String y_m_d_2 = sc.nextLine();        sc.close();        //String 转 int        int x =Integer.parseInt(y_m_d_1.substring(0,4));//截取年        int y =Integer.parseInt(y_m_d_1.substring(4,6));//截取月        int z =Integer.parseInt(y_m_d_1.substring(6,8));//截取日        int a =Integer.parseInt(y_m_d_2.substring(0,4));//截取年        int b =Integer.parseInt(y_m_d_2.substring(4,6));//截取月        int c =Integer.parseInt(y_m_d_2.substring(6,8));//截取日        int year_1 = countDay(x,y,z);        int year_2 = countDay(a,b,c);         System.out.println(">------------查询结果----------<");            Ture_or_False(x,y,z);            calcWeek(x,y,z);             sumday(year_1,year_2,x,y,z,a,b,c);            ages(year_1,year_2,x,y,z);         System.out.println("|------------------------------|");  }}
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