java問題求年齡

import java.util.Calendar;

public class DataCount {

int year;
int month;
int day;

public DataCount(int year, int month, int day) {
this.year = year;
this.month = month;
this.day = day;
}

public void tellBirthDay() {
System.out.println("生日:" + year + "年" + month + "月" + day + "日");
}

public void tellAge() {
Calendar ca = Calendar.getInstance();
int thisYear = ca.get(Calendar.YEAR);
System.out.println("年齡:" + (thisYear - this.year));
}

public static void main(String[] args) {
DataCount dt = new DataCount(1985, 6, 26);
dt.tellBirthDay();
dt.tellAge();
}
}

② 用java寫用戶在控制台按照「yyyy/mm/dd」的格式輸入出生日期,請計算用戶的年齡

年齡就是把當前的年份與用戶的年份相減得到一個對象值1。然後將用戶輸入日期中的年份換成當年的,組成一個新的日期,將這新的日期與當天的日期進行比較,得到另一個對象值2。這個對象值2就是距離用戶的生日的天數。這天數是正,那對象值1就是用戶的年齡,是負把對象值+1就好。參考兩日期之間的天數差方法:
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) {
// 日期型字元串格式錯誤
}
int nDay = (int) ((secondDate.getTime() - firstDate.getTime()) / (24 * 60 * 60 * 1000));
return nDay;
}

③ java 輸入生日年齡 然後算出幾歲 最好能把具體代碼發過來

以下代碼是關於年齡計算的 其中不包含正則判斷部分,如果有什麼問題可以再交流
希望可以幫到你~

package api;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Scanner;
/**
* 業務需求輸入一個生日(字元串),
* 返回該生日到系統時間的時間間隔
* @author Administrator
*
*/
public class BirthDate {
public static void main(String[] args) throws ParseException {
//創建Scanner
Scanner scanner = new Scanner(System.in);
System.out.println("請輸入生日(格式為yyyy-MM-dd):");
String BirthDate = scanner.nextLine();
//將字元串轉換為Date類型
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date date = new Date();
date = sdf.parse(BirthDate);
//使用calendar進行計算
Calendar calendar = Calendar.getInstance();
//獲取當前時間毫秒值
long now = (new Date()).getTime();
long Birthdate = date.getTime();
long time = now-Birthdate;
int count=0;
//時間換算
long days = time/1000/60/60/24;
//判斷閏年
int birthYear = Integer.parseInt(( BirthDate.substring(0, 4)));
for(int i=calendar.get(Calendar.YEAR);i>=birthYear;i--)
if((i%4==0 && !(i%100==0)) ||
(i%400==0) ){
count++;
}
//加入閏年因素進行整理換算
int age = ((int)days-count)/365;
System.out.println("到目前為止,活了"+age+"歲");

}

}

④ java一段計算年齡代碼如何用最簡化的方式寫

可以用循環啊,定義類person
Class person{

@Getter
@Setter

private int age;
@Getter
@Setter
private String name;

public person(int age,String name){
this.age=age;
this.name=name.

}

}

判斷年齡就用數組做了,假設你放一個ArrayList里
ArrayList<Person> personList=new ArrayList();
personList.add(父親)
personList.add(爺爺)
personList.add(兒子)
for(Person person:personList){
if (person.getage>90){
game over

}else if(person.getage<0){
洗洗睡吧

}else{
列印名字和年齡 getname()+getage()

}

}

⑤ java計算年齡

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("年齡計算器");

}
}

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("確定");
button.addActionListener(this);
t1 = new TextField(2);
t2 = new TextField(2);
t3 = new TextField(2);
l = new Label(" 請輸入您的生日 ");
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("您的年齡約為" + s + " 歲");
} catch (NumberFormatException ee) {
l.setText("請正確輸入");
}
}
}
}

功底淺薄,如果有問題,還望指教。

⑥ java計算成員年齡平均值,最大值,最小值

int[]arr=int[-9,4,8,-5,3,17,-29,32,2,-43];//數組Listlist=arr.ToList();//數組轉換成Listlist.Max();//最大值list.Min();//最小值list.Sum()/list.Count;//平均值

⑦ java為何計算10個人中30歲以上,30歲以下的比例

可以使用list存儲年齡數據,之後分別定義2個統計變數統計30歲以上,30歲以下的個數,再之後用這2個變數分別去除list.size()即可得到對應的比例了

⑧ 用java實現年齡計算器,就是在界面上輸入一個人出生年月日(yyyy-mm-dd),顯示現在多少歲,假設一年有365天

這是一段javascript寫的,無論是java或javascript原理都一樣,進攻參考
<!-- 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 = "請輸入4位數的年份.";
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 = "你已經滿了 " + age+ " 周歲 . . .\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 + " 月齡\n";
document.agecalc.timealive.value += " 或 " + weeks + " 周齡\n";
document.agecalc.timealive.value += " 或 " + totdays + " 日齡\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 + " 小時\n";
var min = (hour * 60) + gmin;
document.agecalc.timealive.value += " 或 " + min + " 分鍾\n";
sec = (min * 60) + gsec;
document.agecalc.timealive.value += " 或 " + sec + " 秒鍾";
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祝賀您!今天是你的生日!祝你生日快樂!";
} else {
document.agecalc.timealive.value += "\n\n另外,你下一個生日距今還有:\n"
+ bday + " 天 " + nhour + " 小時 " + 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 -->
來自 http://www.dragon-guide.net/hangye/birthday.htm

⑨ 請用java計算你的年齡 告訴我你是哪月哪日出生的

變數無非就是閏年和平年的天數,以及精確到閏年的月份和平年的月份天數不差1天,加個詢問讓使用者輸入生日,並約束格式(1999-9-9)