小弟刚学完java里的常用类。老师讲的不全面，求各位大神指点这道题怎么做？需要导入什么包。

求完整代码，自己研究在控制台输入你的出生日期，判断你的年龄(周岁)，如输入1989-3-28:输出 23岁 如输入1989-12-30:输出 22岁

import java.util.*;
import java.text.*;
public class Test{
public static void main(String[] args) throws Exception{
Scanner sr=new Scanner(System.in);
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
Date birth=sdf.parse(sr.nextLine());
Calendar birthday = Calendar.getInstance();
birthday.setTime(birth);
Calendar now = Calendar.getInstance();
System.out.println((now.get(Calendar.YEAR)-birthday.get(Calendar.YEAR))+"岁");
}
}

public class Test{ public static void main(String[] args){ Age a = new Age(); System.out.println("今年"+a.panDuan()+"岁"); } } class Age{ public int panDuan(){ java.util.Scanner sc = new java.util.Scanner(System.im); System.out.println("请输入出生年月，格式：yyyy-MM-dd"); String nyr = sc.next(); int num = Integer.parseInt(new java.text.SimpleDateFormat("yyyy").format(new java.util.Date())) - Integer.parseInt(nyr.substring(0,4)); return num; } }

你自己建个项目，把里边的文件复制进去不就得了

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class YearTest { public static void main(String[] args) { // TODO Auto-generated method stub BufferedReader in = new BufferedReader(new InputStreamReader( System.in)); try { while(true) { String rr=in.readLine(); System.out.println("输入的生日为"+rr); int b=Integer.parseInt(rr.substring(0,4)); System.out.println("年龄为:" +(2013-b)); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }