[Java]想计算出设置的日期距今的年数

Question

import java.util.*;
class T1{
private int years;
private Date createDate;
private Date nowDate;

public static void main (String[] args){
    T1 tt = new T1();
      tt.setCreateDate(12-20-2003);
    System.out.println(tt.getYear());
}

public int getYear(){
    Calendar c1 = Calendar.getInstance();
    Calendar c2 = Calendar.getInstance();

    c1.setTime(createDate);
    years = c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR);

    return years;

}

public void setCreateDate(Date createDate){
    this.createDate = createDate;
}

}

好像在格式转换的地方有问题，但是不知道该怎么改
求助！

Answer 1

需要先把字符串转成Date类型，main可以参考如下试下：

import java.text.ParseException;
import java.text.SimpleDateFormat;
上面的包先加上

public static void main(String[] args)  {
        DateTest tt = new DateTest();
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        try {
            tt.setCreateDate(format.parse("2003-12-20"));
        } catch (ParseException e) {
            e.printStackTrace();
        }

        System.out.println(tt.getYear());
    }