用于GregorianCalendar数组列表的Java怪异系统输出
我目前试图从雅虎财经API收到的数据保存到不同的数组列表，但我有点麻烦
package Stocks;
import java.text.*;
import java.util.*;
import java.net.URL;
import java.net.URLConnection;
import java.util.Calendar;
import java.util.Collection;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Scanner;
import java.util.Arrays;
public class StockDownload {
public static final int DATE = 0;
public static final int OPEN = 1;
public static final int HIGH = 2;
public static final int LOW = 3;
public static final int CLOSE = 4;
public static final int VOLUME = 5;
public static final int ADJUSTED = 6;
private ArrayList<GregorianCalendar>dates;
private ArrayList<Double>opens;
private ArrayList<Double>highs;
private ArrayList<Double>lows;
private ArrayList<Double>closes;
private ArrayList<Integer>volumes;
private ArrayList<Double>adjcloses;
public StockDownload(String symbol,
GregorianCalendar start, GregorianCalendar end){
dates = new ArrayList<GregorianCalendar>();
opens = new ArrayList<Double>();
highs = new ArrayList<Double>();
lows = new ArrayList<Double>();
closes = new ArrayList<Double>();
volumes = new ArrayList<Integer>();
adjcloses = new ArrayList<Double>();
String url = "http://ichart.yahoo.com/table.csv?s=" + symbol
+ "&a=" + start.get(Calendar.MONTH)
+ "&b=" + start.get(Calendar.DAY_OF_MONTH)
+ "&c=" + start.get(Calendar.YEAR)
+ "&d=" + end.get(Calendar.MONTH)
+ "&e=" + end.get(Calendar.DAY_OF_MONTH)
+ "&f=" + end.get(Calendar.YEAR)
+ "&g=d" + "&ignore=.csv";
try{
URL yahoofin = new URL(url);
URLConnection data = yahoofin.openConnection();
Scanner input = new Scanner(data.getInputStream());
if(input.hasNext())
input.nextLine();
while(input.hasNextLine()){
String line = input.nextLine();
String info[] = line.split(",");
dates.add(getDates(info[0]));
}
for(int i = 0; i < dates.size(); i++){
System.out.println(dates.get(i));
}
}catch(Exception e){
System.err.println(e);
}
}
public GregorianCalendar getDates(String date){
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
Date rawdate = null;
try {
rawdate = df.parse(date);
} catch (ParseException e) {
e.printStackTrace();
}
GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance();
cal.setTime(rawdate);
GregorianCalendar cleandate = cal;
return cleandate;
}
}
输出im得到看起来像这样：java.util.GregorianCalendar [time = 1344229200000，areFieldsSet = true，areAllFieldsSet = true，lenient = true，zone = sun.util.calendar.ZoneInfo [id =“America / Chicago”，offset = -21600000，dstSavings = 3600000，useDaylight =真，过渡= 235，lastRule = java.util.SimpleTimeZone中[ID =美国/芝加哥，偏移= -21600000，dstSavings = 3600000，useDaylight =真，startYear = 0，STARTMODE = 3， startMonth = 2，朝九特派= 8，startDayOfWeek = 1，开始时间= 7200000，startTimeMode = 0，endMode = 3，endMonth = 10，endday指定= 1，一个endDayOfWeek = 1，结束时间= 7200000，endTimeMode = 0]]，Firstdayofweek可= 1， minimalDaysInFirstWeek = 1，ERA = 1，YEAR = 2012，MONTH = 7，WEEK_OF_YEAR = 32，WEEK_OF_MONTH = 2，DAY_OF_MONTH = 6，DAY_OF_YEAR = 219，DAY_OF_WEEK = 2，DAY_OF_WEEK_IN_MONTH = 1，AM_PM = 0，HOUR = 0，HOUR_OF_DAY = 0，MINUTE = 0，SECOND = 0，微差= 0，ZONE_OFFSET = -21600000，DST_OFFSET = 3600000]
我认为这在技术上是正确的，只是比我需要更多的信息。
我测试了只是打印出存储在info []索引中的内容，我只是无法将数据推送到数组列表中。 任何援助或参考一些很好的阅读材料将不胜感激！ 谢谢
PS发起这个类没有显示，但它所做的只是将必要的变量传递给StockDownload方法
然后，您想要使用相同的SimpleDateFormat进行打印，
System.out.println(dates.get(i)); //<-- change this
到类似的东西
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
System.out.println(df.format(dates.get(i).getTime()));
上一篇: Java Weird System output for GregorianCalendar arraylist