java新手写的测试自己出生了多少天

package 实验十二;


import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.Scanner;


/**
 * 
 * @Chapter:计算自己出生的天数
 * @author ControlPower
 * @version 1.7
 * @data 
 * @remarks
 * Ctrl + Shift + f 格式化代码
 * java->Code Style ->Code Templates 
 * Alt + Shift + J 题目注释
 */
public class s5 {


public static void main(String[] args) {
GregorianCalendar gcal = new GregorianCalendar();
Calendar cal = Calendar.getInstance();
int sum = 0;

System.out.print("请输入出生年:");
int year = new Scanner(System.in).nextInt();
System.out.print("请输入出生月:");
int month = new Scanner(System.in).nextInt();
System.out.print("请输入出生日:");
int day = new Scanner(System.in).nextInt();
gcal.set(year, month - 1, day); //减一

String[] week = {"","星期天","星期一","星期二","星期三","星期四","星期五","星期六"};
String str = String.format("您的出生日期是:%d年%d月%d日", gcal.get(Calendar.YEAR),gcal.get(Calendar.MONTH) + 1,gcal.get(Calendar.DAY_OF_MONTH));
str += "  " + week[gcal.get(Calendar.DAY_OF_WEEK)];

System.out.println(str);
if(gcal.isLeapYear(gcal.get(Calendar.YEAR))) {
sum += 366 - gcal.get(Calendar.DAY_OF_YEAR);
}else {
sum += 365 - gcal.get(Calendar.DAY_OF_YEAR);
}
for (int i = gcal.get(Calendar.YEAR) + 1; i < cal.get(Calendar.YEAR); i++) {
if(gcal.isLeapYear(i)) {
sum += 366;
}else {
sum += 365;
}
}
sum += cal.get(Calendar.DAY_OF_YEAR);
System.out.println("您已经出生了:" + sum + "天");



}


}