java随机生日,使用java根据出生日期怎么得到还有几天就生日了

Java codeSimpleDateFormat myFormatter = new SimpleDateFormat(“yyyyMMdd”);

String clidate = “19780330”;

Calendar cToday = Calendar.getInstance(); // 存今天

Calendar cBirth = Calendar.getInstance(); // 存生日

cBirth.setTime(myFormatter.parse(clidate)); // 设置生日

cBirth.set(Calendar.YEAR, cToday.get(Calendar.YEAR)); // 修改为本年

int days;

if (cBirth.get(Calendar.DAY_OF_YEAR) < cToday.get(Calendar.DAY_OF_YEAR)) {

// 生日已经过了，要算明年的了

days = cToday.getActualMaximum(Calendar.DAY_OF_YEAR) – cToday.get(Calendar.DAY_OF_YEAR);

days += cBirth.get(Calendar.DAY_OF_YEAR);

} else {

// 生日还没过

days = cBirth.get(Calendar.DAY_OF_YEAR) – cToday.get(Calendar.DAY_OF_YEAR);

}

// 输出结果

if (days == 0) {

System.out.println(“今天生日”);

} else {

System.out.println(“距离生日还有：” + days + “天”);

}