「java根据日期计算年龄」java根据日期计算天数
今天给各位分享java根据日期计算年龄的知识，其中也会对java根据日期计算天数进行解释，如果能碰巧解决你现在面临的问题，别忘了关注本站，现在开始吧！
本文目录一览：
- 1、java计算年龄
- 2、用java实现年龄计算器,就是在界面上输入一个人出生年月日(yyyy-mm-dd),显示现在多少岁,假设一年有365天
- 3、java根据孩子生日,比如1979-05-13，怎么转换孩子年龄为几岁几月几周，比如一岁10月两周
- 4、在java中，根据年龄，计算出生年份。比如：23岁，1990年出生
- 5、用java写用户在控制台按照“yyyy/mm/dd”的格式输入出生日期，请计算用户的年龄
java计算年龄
import java.util.Calendar;
import java.util.Date;
import java.awt.*;
import java.awt.event.*;
import java.text.NumberFormat;
public class H {
public static void main(String args[]) {
new Time("年龄计算器");
}
}
class Time extends Frame implements ActionListener {
Calendar calendar;
Button button;
TextField t1, t2, t3;
Label l, l1, l2, l3;
Time(String s) {
super(s);
setLayout(new FlowLayout());
button = new Button("确定");
button.addActionListener(this);
t1 = new TextField(2);
t2 = new TextField(2);
t3 = new TextField(2);
l = new Label(" 请输入您的生日 ");
l.setBackground(Color.cyan);
l1 = new Label("年");
l2 = new Label("月");
l3 = new Label("日");
add(l);
add(t1);
add(l1);
add(t2);
add(l2);
add(t3);
add(l3);
add(button);
setBounds(100, 100, 280, 100);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
setVisible(true);
validate();
}
public void actionPerformed(ActionEvent e) {
calendar = Calendar.getInstance();
calendar.setTime(new Date());
NumberFormat f = NumberFormat.getInstance();
long time = calendar.getTimeInMillis();
if (e.getSource() == button) {
try {
int n = Integer.parseInt(t1.getText());
int y = Integer.parseInt(t2.getText());
int r = Integer.parseInt(t3.getText());
calendar.set(n, y - 1, r);
double time1 = calendar.getTimeInMillis();
double c = (time - time1) / (1000 * 60 * 60 * 24);
double d = c/365;
f.setMaximumFractionDigits(2);
String s = f.format(d);
l.setText("您的年龄约为" + s + " 岁");
} catch (NumberFormatException ee) {
l.setText("请正确输入");
}
}
}
}
功底浅薄，如果有问题，还望指教。
用java实现年龄计算器,就是在界面上输入一个人出生年月日(yyyy-mm-dd),显示现在多少岁,假设一年有365天
这是一段javascript写的，无论是java或javascript原理都一样，进攻参考
!-- Begin
function run() {
with (document.agecalc) {
dd = parseInt(day.selectedIndex) + 1;
mm = parseInt(month.selectedIndex) + 1;
yy = year.value;
if (yy.length != 4 || isNaN(yy)) {
document.agecalc.timealive.value = "请输入4位数的年份.";
document.agecalc.year.select();
document.agecalc.year.focus();
return;
}
}
days = new Date();
gdate = days.getDate();
gmonth = days.getMonth();
gyear = days.getYear();
if (gyear 2000) gyear += 1900;
age = gyear - yy;
if ((mm == (gmonth + 1)) (dd = parseInt(gdate))) {
age = age;
} else {
if (mm = (gmonth)) {
age = age;
} else {
age = age - 1;
}
}
if (age == 0)
age = age;
document.agecalc.timealive.value = "你已经满了 " + age+ " 周岁 . . .\n\n";
if (mm = (gmonth + 1))
age = age - 1;
if ((mm == (gmonth + 1)) (dd parseInt(gdate)))
age = age + 1;
var m;
var n;
if (mm == 12) n = 31 - dd;
if (mm == 11) n = 61 - dd;
if (mm == 10) n = 92 - dd;
if (mm == 9) n = 122 - dd;
if (mm == 8) n = 153 - dd;
if (mm == 7) n = 184 - dd;
if (mm == 6) n = 214 - dd;
if (mm == 5) n = 245 - dd;
if (mm == 4) n = 275 - dd;
if (mm == 3) n = 306 - dd;
if (mm == 2) { n = 334 - dd; if (leapyear(yy)) n++; }
if (mm == 1) { n = 365 - dd; if (leapyear(yy)) n++; }
if (gmonth == 1) m = 31;
if (gmonth == 2) {
m = 59;
if (leapyear(gyear)) m++;
}
if (gmonth == 3) { m = 90; if (leapyear(gyear)) m++; }
if (gmonth == 4) { m = 120; if (leapyear(gyear)) m++; }
if (gmonth == 5) { m = 151; if (leapyear(gyear)) m++; }
if (gmonth == 6) { m = 181; if (leapyear(gyear)) m++; }
if (gmonth == 7) { m = 212; if (leapyear(gyear)) m++; }
if (gmonth == 8) { m = 243; if (leapyear(gyear)) m++; }
if (gmonth == 9) { m = 273; if (leapyear(gyear)) m++; }
if (gmonth == 10) { m = 304; if (leapyear(gyear)) m++; }
if (gmonth == 11) { m = 334; if (leapyear(gyear)) m++; }
if (gmonth == 12) { m = 365; if (leapyear(gyear)) m++; }
months = age * 12;
months += 12 - parseInt(mm);
months += gmonth;
totdays = (parseInt(age) * 365);
totdays += age / 4;
totdays = parseInt(totdays) + gdate + m + n;
if (gmonth == 1) p = 31 + gdate;
if (gmonth == 2) {
p = 59 + gdate;
if (leapyear(gyear)) m = m+1;
}
if (gmonth == 3) { p = 90 + gdate; if (leapyear(gyear)) p++; }
if (gmonth == 4) { p = 120 + gdate; if (leapyear(gyear)) p++; }
if (gmonth == 5) { p = 151 + gdate; if (leapyear(gyear)) p++; }
if (gmonth == 6) { p = 181 + gdate; if (leapyear(gyear)) p++; }
if (gmonth == 7) { p = 212 + gdate; if (leapyear(gyear)) p++; }
if (gmonth == 8) { p = 243 + gdate; if (leapyear(gyear)) p++; }
if (gmonth == 9) { p = 273 + gdate; if (leapyear(gyear)) p++; }
if (gmonth == 10) { p = 304 + gdate; if (leapyear(gyear)) p++; }
if (gmonth == 11) { p = 334 + gdate; if (leapyear(gyear)) p++; }
if (gmonth == 12) { p = 365 + gdate; if (leapyear(gyear)) p++; }
weeks = (age * 365) + n + p;
weeks = weeks / 7;
etcdays = parseFloat(weeks) - parseInt(weeks);
etcdays = Math.round(etcdays * 7);
weeks = parseInt(weeks);
etcdays += parseInt(age / 4);
if (etcdays 7)
weeks += parseInt(etcdays / 7);
document.agecalc.timealive.value += " 或 " + months + " 月龄\n";
document.agecalc.timealive.value += " 或 " + weeks + " 周龄\n";
document.agecalc.timealive.value += " 或 " + totdays + " 日龄\n";
var time = new Date();
ghour = time.getHours();
gmin = time.getMinutes();
gsec = time.getSeconds();
hour = ((age * 365) + n + p) * 24;
hour += (parseInt(age / 4) * 24);
document.agecalc.timealive.value += " 或 " + hour + " 小时\n";
var min = (hour * 60) + gmin;
document.agecalc.timealive.value += " 或 " + min + " 分钟\n";
sec = (min * 60) + gsec;
document.agecalc.timealive.value += " 或 " + sec + " 秒钟";
mm = mm - 1;
var r;
if (mm == 0) r = 0;
if (mm == 1) r = 31;
if (mm == 2) { r = 59; if (leapyear(gyear)) m++; }
if (mm == 3) { r = 90; if (leapyear(gyear)) r++; }
if (mm == 4) { r = 120; if (leapyear(gyear)) r++; }
if (mm == 5) { r = 151; if (leapyear(gyear)) r++; }
if (mm == 6) { r = 181; if (leapyear(gyear)) r++; }
if (mm == 7) { r = 212; if (leapyear(gyear)) r++; }
if (mm == 8) { r = 243; if (leapyear(gyear)) r++; }
if (mm == 9) { r = 273; if (leapyear(gyear)) r++; }
if (mm == 10) { r = 304; if (leapyear(gyear)) r++; }
if (mm == 11) { r = 334; if (leapyear(gyear)) r++; }
mm = mm + 1;
r = parseInt(r) + parseInt(dd);
if ((mm = (gmonth + 1)) (dd gdate)) {
bday = r - m - gdate;
}
else {
if ((leapyear(gyear)) ((mm 2) (dd 29))) {
a = 366;
} else {
a = 365;
}
bday = a + (r - m - gdate);
}
nhour = 24 - parseInt(ghour);
nmin = 60 - parseInt(gmin);
nsec = 60 - parseInt(gsec);
while (bday 366) bday -= 365;
if (((bday == 366) (leapyear(gyear)) || ((bday == 365) (!leapyear(gyear))))) {
document.agecalc.timealive.value += "\n\nSenlon祝贺您！今天是你的生日！祝你生日快乐！";
} else {
document.agecalc.timealive.value += "\n\n另外，你下一个生日距今还有：\n"
+ bday + " 天 " + nhour + " 小时 " + nmin + " 分 " + nsec + " 秒";
setTimeout("run()", 1000);
}
}
function leapyear(a) {
if (((a%4 == 0) (a%100 != 0)) || (a%400 == 0))
return true;
else
return false;
}
// End --
来自
java根据孩子生日,比如1979-05-13，怎么转换孩子年龄为几岁几月几周，比如一岁10月两周
public class TestDate {
/**
* 获取现在时间
*/
public static String getStringDate() {
Date currentTime = new Date();
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
String dateString = formatter.format(currentTime);
return dateString;
}
/**
* 两个时间之间的天数
*/
public static long getDays(String date1, String date2) {
if (date1 == null || date1.equals(""))
return 0;
if (date2 == null || date2.equals(""))
return 0;
// 转换为标准时间
SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
java.util.Date date = null;
java.util.Date mydate = null;
try {
date = myFormatter.parse(date1);
mydate = myFormatter.parse(date2);
} catch (Exception e) {
}
long day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
return Math.abs(day);
}
public static void main(String[] args) {
long day=getDays("1979-04-13", getStringDate());
long year=day/365;
long month=(day-365L*year)/30+1;
long week=day/7+1;
System.out.println(year+"岁"+month+"月"+week+"周");
}
}
由于没考虑闰年闰月，不是那么准确，另外题目对于周的显示上是指一个月的第几周还是总共多少周？
楼下JAVA软件工程师孙成 截取字符串的方法也很不错，但在计算周有错误，不应该用%，改成Math.abs((stopz +30)- (startz+30))/7+1
在java中，根据年龄，计算出生年份。比如：23岁，1990年出生
这个得用Calendar类
首先获取现在的日期 Calendar mycalendar=Calendar.getInstance();//获取现在时间
String 年=String.valueOf(mycalendar.get(Calendar.YEAR));//获取年份
// 用文本框输入年龄
int age=text1.getText().parseInt();
int birth=年.parseInt()-age;
System.out.println("birth"年出生）;
用java写用户在控制台按照“yyyy/mm/dd”的格式输入出生日期，请计算用户的年龄
年龄就是把当前的年份与用户的年份相减得到一个对象值1。然后将用户输入日期中的年份换成当年的，组成一个新的日期，将这新的日期与当天的日期进行比较，得到另一个对象值2。这个对象值2就是距离用户的生日的天数。这天数是正，那对象值1就是用户的年龄，是负把对象值+1就好。参考两日期之间的天数差方法：
public static int getDiffDay(String firstString, String secondString) {
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
Date firstDate = null;
Date secondDate = null;
try {
firstDate = df.parse(firstString);
secondDate = df.parse(secondString);
} catch (Exception e) {
// 日期型字符串格式错误
}
int nDay = (int) ((secondDate.getTime() - firstDate.getTime()) / (24 * 60 * 60 * 1000));
return nDay;
}
java根据日期计算年龄的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于java根据日期计算天数、java根据日期计算年龄的信息别忘了在本站进行查找喔。
发布于：2023-03-22，除非注明，否则均为原创文章，转载请注明出处。