this is my first question here ever, and I would appreciate if you can help me.
Since the code I have is way too large to post here, I'll try to describe what my problem is in short.
So, I have made TimeSeries array within my class and array list from where I get values for time series:
private TimeSeries[] seriesArray = new TimeSeries[10];
ArrayList<TempClass> valuesFromArrayList = new ArrayList<>();
I need to make TimeSeries array, because I want to be able to show multiple timeseries graphs. Using only one TimeSeries and addOrUpdate method isn't what I want because then values get mixed when I create more graphs. So, I add values like this:
for(int i = 0; i < valuesFromArrayList.size(); i++)
{
TempClass obj = (TempClass) valuesFromArrayList.get(i);
int timeStamp = obj.getTimeStamp();
int hrsDiff;
int minsDiff;
int secsDiff;
hrsDiff = timeStamp / 3600;
timeStamp = timeStamp - hrsDiff * 3600;
minsDiff = timeStamp / 60;
timeStamp = timeStamp - minsDiff * 60;
secsDiff = timeStamp;
seriesArray[Integer.parseInt(comboBoxValue) - 1].add(new Second(secsDiff, minsDiff, hrsDiff, day, month, year), Math.abs(obj.getValue()));
}
What this part of code does is that it reads values and timestamps from ArrayList I created. There is comboBox where user can choose which timeSeries array index will be in graph. So, if user chooses value 9 from comboBox, timeSeries from index 8 will be chosen and plotted on graph. TimeStamp is simply number of seconds that passed since 00:00:00 at day when values were taken.
TempClass is defined as:
class TempClass
{
private int timeStamp;
private double value;
public TempClass(int a, double b)
{
timeStamp = a;
value = b;
}
public int getTimeStamp()
{
return timeStamp;
}
public double getValue()
{
return value;
}
public void setValue(double val)
{
value = val;
}
}
The problem I have is that when I try to make second (2nd) graph, that is another index of TimeSeries array, I get message:
You are attempting to add an observation for the time period Thu Apr 30 00:00:00 CEST 2015 but the series already contains an observation for that time period. Duplicates are not permitted. Try using the addOrUpdate() method.
I don't want to use addOrUpdate method, I need add method. Values in ArrayList I use to put values into timeSeries are fine, I am 300% sure. I already checked input from comboBox value and it gives correct values.
I have no explanation other that for some reason, even if array index is changed, data I want to write into the series goes to the old series (that is, to the series at the old index). In other words, it seems like even if I change index of array, it keeps writing into the old array index!
It's like equivalent to this (I know this sounds crazy but that is basically what I am getting):
int[] array = new int[5];
array[0] = 1;
array[1] = 2;
System.out.println(array[0]);
And the output I get is
2
This is something I have never heard of before, and I have code similar to this I wrote here in two other places, and in that two places it goes just fine, but in this third place I keep getting that exception.
Is this some kind of bug in JVM?
Does somebody know what this could be?
I don't know too much about TimeSeries, but after skimming the docs about it it says:
"The time series will ensure that (a) all data items have the same
type of period (for example, Day) and (b) that each period appears at
most one time in the series."
Link to Docs
I'm guessing the error is pretty straight forward or a misuse of TimeSeries. It looks like you are simply adding a duplicate date and that the constraints of TimeSeries don't allow that.
You may wish to consider writing a custom class that has the functionality you want. Yet again, I don't know much about TimeSeries, but I hope this helped a little.
Your for loop will always overwrite the value with an index of 0 on seriesArray.
What I mean is, the first time it will write to [0]
The second it will write to [0] then [1]
Is this intended?
I have not looked at the docs too much, but the message says 'the series already contains an observation for that time period.' I think that loop is not doing what you want it to do.
Related
I have a CSV file that i stored as an arraylist in Java. Here's the code i ran
public class StockData {
private ArrayList<StockRecord> records;
public StockData() {
records = new ArrayList<StockRecord>();
}
//reads the file from the folder
public void loadPriceData(String filepath) {
try {
Scanner scanner = new Scanner(new FileReader(filepath));
String line;
StockRecord record;
scanner.nextLine();
while (scanner.hasNextLine()) {
line = scanner.nextLine();
String[] results= line.split(",");
double open = Double.parseDouble( results[1]);
double high = Double.parseDouble( results[2]);
double low = Double.parseDouble( results[3]);
double close = Double.parseDouble( results[4]);
double volume = Double.parseDouble( results[5]);
double adjClose = Double.parseDouble( results[6]);
//create the record
record = new StockRecord(results[0], open, high, low, close, volume, adjClose);
records.add(record);
}
scanner.close();
} catch (Exception e) {
System.out.println("Error: " + e.getMessage());
}
}
}
The code works correctly however, i am having trouble with the next part of the project.
Data Example
Date Open High Low Close Volume Adj Close
6/10/2011 128.85 128.93 127.26 127.6 238629400 126.97
6/13/2011 127.89 128.24 127.05 127.7 207599800 127.07
6/14/2011 128.87 129.77 128.82 129.32 160570400 128.68
6/15/2011 128.24 129.3 126.68 127.02 300958000 126.39
6/16/2011 127.06 127.97 126.32 127.3 308032800 126.67
I'm trying to print out the AdjClose price for a date range. say between 6/13/2011 and 06/15/2016. It seems like i would need to find the index of the date first and then print the price record.
How can i do this? I'm not sure where to start. Do i first need to save the date in the its own list/array and use that to find the index?
Thanks
You would need to iterate through the list of StockRecord and compare each record's date to your specified range. If it falls in the range you would print it. This can be optimized if your list is sorted.
To compare first date is preferable to use a data type date
If your array could scouring records and objects of type StockRecord comparing your date field you want to evaluate
for (StockRecord reg : records) {
if(reg.date.after(historyDate) && reg.date.before(futureDate)) {
System.out.println(reg.toString()); // print object
}
}
Your Question is really a duplicate of many others in Stack Overflow.
LocalDate
Your example code does not actually show the date as part of your StockRecord class. But it should be a member of type LocalDate. Search Stack Overflow for countless posts on how to parse your input string into a LocalDate.
Comparator
Define a Comparator for your class, to extract the LocalDate for comparisons. The LocalDate class itself implements the compareTo method, as well as isBefore, isAfter, and isEqual.
Benefit of sorting
If you will be doing this query often, then it makes sense to sort the StockRecord objects into a List. Then you can be smart about searching, again discussed on many other posts in Stack Overflow.
SortedMap
You could organize the StockRecord objects into a SortedMap, mapping the LocalDate to a Collection of the StockRecord objects sharing that particular date. Using a SortedMap rather than a mere Map lets you do smarter searches for a date range, as mentioned above. Again, many posts on Stack Overflow about maps.
Apache Commons CSV
By the way, Apache Commons CSV project makes easy work of reading and parsing a CSV data file.
BigDecimal
Do not use double or Double for currency amounts, or for any fractional number where accuracy matters. Those types are floating-point types, built for speed but trading away accuracy. You will be introducing extraneous extra digits into the end of the decimal fraction.
Instead use BigDecimal. Yet again, many posts on Stack Overflow on this class.
Integers
Do not use a fractional number like Double for an integer number such as your Volume field. Doing so wastes memory, and creates confusion to anyone reading your code.
Use a 32-bit integer or Integer if your maximum value is two billion or less (2^31-1 = 2,147,483,647), otherwise a 64-bit long or Long.
I've been looking everywhere for a solution but can't manage to find one that works.
I have a "Scoreboard" that needs to show the highest "times" (period between two instants) the app has calculated with Joda Time.
All the strings are stocked in an ArrayList and displayed through an ArrayAdapter and a ListView.
The problem : Collections.sort doesn't seem to work properly even with ISO format.
i'm saving the time using the format :
PeriodFormatter formatter = ISOPeriodFormat.standard();
Which gives out this : "PT1M15.664S"
(1 min 15seconds)
That i convert to a string and store into the ArrayList.
How can i sort these strings so it goes from the longest to the shortest amount of time in my Scoreboard ?
I've tried natural sorting and Alphanum Comparator with no luck. Every time it passes a cap (minutes, hours, days) the values get like this :
"PT2.455S"
"PT1.324S"
"PT1M15.333S"
Instead of what i would like :
"PT1M15.333S"
"PT2.455S"
"PT1.324S"
Using Collection.sort(myArrayList) doesn't work either.
Any idea what i should do ?
My code :
// set is a set<String> retrieving it's values from a stringset scores saved
in the sharedpreferences of the app
set = sharedPreferences.getStringSet("scores", null);
//scores is the ArrayList
scores.clear();
if (set != null){
scores.addAll(set);
}else{
scores.add("No Time Yet!");
set = new LinkedHashSet<String>();
set.addAll(scores);
sharedPreferences.edit().putStringSet("scores",set).apply();
}
//removing the String No Time Yet because it no longer serves a purpose here
if ((set != null)&& (set.size()>1)){
scores.remove("No Time Yet!");
}
arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,scores);
listView.setAdapter(arrayAdapter);
Collections.sort(scores);
Thank you for you time.
Short answer: Use the class Duration, not Period.
Explanation:
Your general approach using the class Period is wrong. This type represents a tuple of various amount-unit-pairs. Some of them are not convertible or comparable. For example, it is impossible to determine if P30D is greater or equal to or smaller than P1M (think of February, April or August). So it is pretty clear why you cannot sort by periods resp. why this class does not implement the interface Comparable. And this objection is valid for the objects of type Period as well as for its canonical ISO-representation (as String).
But since you want
the highest "times" (period between two instants)
you can use Duration to determine the absolute amount of elapsed seconds and milliseconds between two given instants. This type is comparable and only has two minor constraints which are probably not important for you:
precision limited to milliseconds
ignores leap seconds
I recommend to compare duration objects, not strings because you want a chronological order, not a lexicographical order. So you could use the String-representation of Duration (like PT72.345S) for storage but parse it for comparison:
Instant i1 = new Instant(0);
Instant i2 = new Instant(72_345);
Duration d1 = new Duration(i1, i2);
Instant i3 = new Instant(60_000);
Instant i4 = new Instant(200_710);
Duration d2 = new Duration(i3, i4);
List<String> scoreTimes = new ArrayList<>();
scoreTimes.add(d1.toString());
scoreTimes.add(d2.toString());
// order from longest times to shortest times
Collections.sort(
scoreTimes,
new Comparator<String>() {
#Override
public int compare(String s1, String s2) {
return Duration.parse(s2).compareTo(Duration.parse(s1));
}
}
);
System.out.println(scoreTimes); // [PT140.710S, PT72.345S]
I want to limit the calls to a function within one day.
The problem is I'm a bit confused of how to use the Date and Calendar classes...
private int usesLeft //Set every day to the number of uses
private void function() {
if(usesLeft > 0) {
//Function's body...
}
usesLeft--;
}
I need to find out when a new day starts in order to reset the usesLeft variable.
Well I found a solution...
The better side of this solution is that the user can't "cheat" because then he'll lose activity days (If my analysis of the code behavior is right).
if(lastDayActive < (int)Math.floor(System.currentTimeMillis()/86400000)) {
usesLeft = 100;
//Initializes the day value
lastDayActive = (int)Math.floor(System.currentTimeMillis()/86400000);
}
If there's any way to prevent the user from manually changing the date and therefore gaining more uses I'd really like to hear about it.
I am currently trying to make a naming convention. The idea behind this is parsing.
Lets say I obtain an xml doc. Everything can be used once, but these 2 in the code below can be submitted several times within the xml document. It could be 1, or simply 100.
This states that ItemNumber and ReceiptType will be grabbed for the first element.
ItemNumber1 = eElement.getElementsByTagName("ItemNumber").item(0).getTextContent();
ReceiptType1 = eElement.getElementsByTagName("ReceiptType").item(0).getTextContent();
This one states that it will grab the second submission if they were in their twice.
ItemNumber2 = eElement.getElementsByTagName("ItemNumber").item(1).getTextContent();
ReceiptType2 = eElement.getElementsByTagName("ReceiptType").item(1).getTextContent();
ItemNumber and ReceiptType must both be submitted together. So if there is 30 ItemNumbers, there must be 30 Receipt Types.
However now I would like to set this in an IF statement to create variables.
I was thinking something along the lines of:
int cnt = 2;
if (eElement.getElementsByTagName("ItemNumber").item(cnt).getTextContent();)
**MAKE VARIABLE**
Then make a loop which adds one to count to see if their is a third or 4th. Now here comes the tricky part..I need them set to a generated variable. Example if ItemNumber 2 existed, it would set it to
String ItemNumber2 = eElement.getElementsByTagName("ItemNumber").item(cnt).getTextContent();
I do not wish to make pre-made variable names as I don't want to code a possible 1000 variables if that 1000 were to happen.
KUDOS for anyone who can help or give tips on just small parts of this as in the naming convention etc. Thanks!
You don't know beforehand how many ItemNumbers and ReceiptTypes you'll get ? Maybe consider using two Lists (java.util.List). Here is an example.
boolean finished = ... ; // true if there is no more item to process
List<String> listItemNumbers = new ArrayList<>();
List<String> listReceiptTypes = new ArrayList<>();
int cnt = 0;
while(!finished) {
String itemNumber = eElement.getElementsByTagName("ItemNumber").item(cnt).getTextContent();
String receiptType = eElement.getElementsByTagName("ReceiptType").item(cnt).getTextContent();
listItemNumbers.add(itemNumber);
listReceiptTypes.add(receiptType);
++cnt;
// update 'finished' (to test if there are remaining itemNumbers to process)
}
// use them :
int indexYouNeed = 32; // for example
String itemNumber = listItemNumbers.get(indexYouNeed); // index start from 0
String receiptType = listReceiptTypes.get(indexYouNeed);
I'm developing a custom Adsense report tool using Google Java Client Library for Android. I've successfully authenticated and can make API calls to the server. but now when I receive the response, I don't know how to parse it and correctly show the result to user.
According to the javaDocs, AdsenseReportsGenerateResponse.getRows() generates a List> But I'm kinda lost how to properly parse it to get:
-Today's earnings
-Yesterday's earnings
-Last 7 days
-Last month
-From the beginning of time
Here's part of my code related to the question
Reports.Generate request = adsense.reports().generate(startDate, endDate);
request.setMetric(Arrays.asList("PAGE_VIEWS", "AD_REQUESTS", "AD_REQUESTS_COVERAGE", "CLICKS",
"AD_REQUESTS_CTR", "COST_PER_CLICK", "AD_REQUESTS_RPM", "EARNINGS"));
request.setDimension(Arrays.asList("DATE", "WEEK", "MONTH"));
request.setSort(Arrays.asList("+DATE"));
AdsenseReportsGenerateResponse response = request.execute();
//TODO: Here be dragons
response.getRows();
Edit: Here is the javaDoc which mentions the getRow()
Hmm it seems nobody on this site can help?!
You should find our sample code useful: http://code.google.com/p/google-api-java-client/wiki/APIs#AdSense_Management_API
Namely, this is the file you're interested in: http://code.google.com/p/google-api-java-client/source/browse/adsense-cmdline-sample/src/main/java/com/google/api/services/samples/adsense/cmdline/GenerateReport.java?repo=samples
Here's a snippet of code to print the output. Mind you, this is for a command line application, but should be easily adaptable:
if ((response.getRows() != null) && !response.getRows().isEmpty()) {
// Display headers.
for (AdsenseReportsGenerateResponseHeaders header : response.getHeaders()) {
System.out.printf("%25s", header.getName());
}
System.out.println();
// Display results.
for (List<String> row : response.getRows()) {
for (String column : row) {
System.out.printf("%25s", column);
}
System.out.println();
}
System.out.println();
} else {
System.out.println("No rows returned.");
}
As for getting the data for different periods of time, you should probably be running different reports, not cramming it all into one, as that would take different start dates and end dates. Here's how it works:
Today's earnings: set the start and end dates to today, set the dimension list to just DATE
Yesterday's earnings: set the start and end date to yesterday, set the dimension list to just DATE
Last 7 days: if you want data per day, then you set the start date to 7 days ago, the end date to today, and the dimension list to just DATE. If you want to aggregate the stats, you may need to calculate this yourself, as WEEK and MONTH refer to a calendar week and month, not the last 7 days.
Last month: start date 1st of last month, end date last day of the month, dimension MONTH.
All time: how do you want this aggregated? Per month? Then set the start date to, say, 1980-1-1, end date to today and dimension to MONTH.
This blog post should help with understanding reporting concepts a bit better: http://adsenseapi.blogspot.com/2011/11/adsense-management-api-diving-into.html
Let me know if you need help with anything else!
Its not a List<List> as far as I understand the api. Try this:
String[][] array = response.getRows();
for (int i = 0; i < array.getSize(); i++){
String dimension = array[i][0];
String metric = array[i][1];
//Do what you want with them
}
I am writing this because the API says it has a list of dimensions with one value for the string and one for the metric, as far as I understand.
If you expect several cells on each row (Which I believe the API doesn't work that way), you need to add another for inside and get the size of the current list probably with something like array[i].getSize()
Post back if it doesn't help you.
Edit: I see now. Try this:
List list = response.getRows();
for (int i = 0; i < list.size(); i++){
List<String> list2 = list.get(i);
for (int j = 0; j < list2.size(); j++){
String value = list2.get(j);
//Do what you want
}
}