abra_ka_dabra

Is there ay inbuilt method to convert 2D array into CSV file? e.g. Can anyone give me a hint to convert [1,2;3,4] into a file output.csv?

Training data: f(1)=0.1 f(2)=0.2 f(3)=0.3 Test data: f(9)=0.9 f(10)=1.0 f(11)=1.1 can you please tell me how the data will look like in training data file and test file?

Just curious to know if we can download youtube videos using downloader using HTTpClient? import java.io.*; import java.net.*; public class trial { public static void main(String[] args){ setAndAuthenticateProxy(); try { URL url = new URL("http://www.youtube.com/watch?v=tQC7rO8cjLs"); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); InputStream in = connection.getInputStream(); FileOutputStream out = new FileOutputStream("C://Temp/fo.flv"); …

Can somebody explain me the use of "Delegate" and its equivalent in java... I am learning java programming and has encountered a C# program which use "Delegate" and pass on functions as arguments to another function.... I am trying to modify the C# program for use in java...

I am trying to download a zip file from a server using the following code but it gives me a tmp.zip of size 1kB. What is the mistake in this program? try { URL url = new URL("http://www.nseindia.com/content/historical/DERIVATIVES/2013/JUN/fo18JUN2013bhav.csv.zip"); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); InputStream in = connection.getInputStream(); FileOutputStream out …

Hi Bhavcopy is the file containing the data of the prices of stock, derivatives etc in a given day for trade at a stock exchange. The stock market i am considering here is NSE India. I want to download the "Bhavcopyfrom derivatives section from the link http://www.nseindia.com/archives/archives.htm". The above link …

Could you please explain me what is a BufferedStream (what is a buffer and how it should be used?)? I have used a code that uses bufferedstream to write to a .txt file. I got the code while googling but don't know the theory behind how it works... please explain.

What is the difference between JDK and JRE? I know its silly to ask but i am shameless till i get my things get clarified... :D

I added a string into an arraylist, but when i want to retrieve it, it does not go into if conditional in the code below: ArrayList a=new ArrayList(); a.add("12"); System.out.println(Integer.toString(1)+","+Integer.toString(2)); if((Integer.toString(1)+Integer.toString(2))==a.get(0)){ System.out.println("this is working here"); } What is the problem here?

I want to create a .csv file. I am using the following code: FileWriter fWriter = null; BufferedWriter writer = null; try { fWriter = new FileWriter("fileName.csv"); writer = new BufferedWriter(fWriter); writer.write("This,line,is,written"); writer.newLine(); writer.close(); } catch (Exception e) { } Does it create a new file if it does not …

Can somebody explain me how to use Comparator class for sorting using Arrays.sort? I have a 2d array.. supoose i want to sort the array 4 by 4 (let us say) using column 1 of array(let us say)...

I am trying to read a CSV file having no. of rows=row and no. of columns=col by the following method: public static String[][] FileIntoArray(int row, int col, String FileName){ int Filerow=0; int Filecol=0; String line; String[][] FileArray= new String[row][col]; File file = new File(FileName); try{ BufferedReader bf = new BufferedReader(new …

How do i get the key of "tradeid3" ? Is there any inbuilt method that does it? import java.util.Map; import java.util.HashMap; import java.util.Iterator; public class abcd{ public static void main(String args[]){ Map m= new HashMap(); m.put("TRADEID1", "tradeid1"); m.put("TRADEID2", "tradeid2"); m.put("TRADEID3", "tradeid3"); } }

I am using the following code to write to the file out1.txt: try{ FileWriter fostream = new FileWriter("out1.txt"); BufferedWriter out = new BufferedWriter(fostream); out.write("jlsdfjdlsfhsdkjf"); out.close(); }catch (Exception e){ System.err.println("Error: " + e.getMessage()); } Now i want to write to multiple files in the same code (let us say 2 files). …

running 'java -version' on my cmd prompt gives me the version of my JRE but when i run my programs as 'javac abc.java' it says 'javac' is not recognised as an internal or external command, operable program or batch file. I have set the Path variable by appending C:\Program Files\Java\jre6\bin …

In the code below, I am trying to convert the target[] strings to a given format in target1[] and then sorting them using bubble sort and store it in target2[] which is a date object array.. However, when the desirable format is "EEE MMM dd kk:mm:ss z yyyy", it is …