dataoutputstream

问题 I have the following code public static void main(String aed[]){ double d=17.3; try{ DataOutputStream out=null; out=new DataOutputStream(new BufferedOutputStream(new FileOutputStream("new.txt"))); out.writeDouble(d); out.flush(); }catch(FileNotFoundException fnf){ fnf.printStackTrace(); }catch(IOException io){ io.printStackTrace(); } } Now I am writing this double value to a text file new.txt , but following value is getting in text file @1LÌÌÌÌÍ But when i use out.writeUTF(""+d) It works

问题 Is it possible to incorporate a horizontal progress bar in the following code? I was thinking os AsyncTask but then I realized, I can't pass an integer value to ProgressUpdate() method inside doInBackground(). Please help! public void sendFileDOS() throws FileNotFoundException { runOnUiThread( new Runnable() { @Override public void run() { registerLog("Sending. . . Please wait. . ."); } }); final long startTime = System.currentTimeMillis(); final File myFile= new File(filePath); //sdcard/DCIM

问题 I am trying to upload large video files to the server. I wrote a piece of code which works well for the image so I thought I should work it for the video too. I wrote the below code. public int uploadFile(String sourceFileUri) { String fileName = sourceFileUri; //Log.v("ONMESSAGE", "File type is " + filetype + "File name is " + fileName); HttpURLConnection conn = null; DataOutputStream dos = null; String lineEnd = "\r\n"; String twoHyphens = "--"; String boundary = "*****"; int bytesRead,

问题 I have the following code which produces an OutOfMemory exception: byte[] buf = new byte[10240]; int len = 0; DataOutputStream dataOS = new DataOutputStream(conn.getOutputStream()); while ((len = _inputStream.read(buf)) > 0) { System.out.println("len : " + len); System.out.println("Going to write buf into dataOS : " + buf.length); dataOS.write(buf, 0, len); System.out.println("dataOS.size() : " + dataOS.size()); } _inputStream.close(); The following is the last few lines from the debug output

问题 I'm generating random ints and trying to write them down to a file. The problem is when I open the file I've created I don't find my ints but a set of symbols like squares etc... Is it a problem of encoding ? import java.io.DataOutputStream; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.ArrayList; import java.util.List; public class GenerateBigList { public static void main(String[] args) { //generate

问题 I have a java applet which I am using to send a file back to my server with - on the server end I want to receive this on a php page. Below is the java code which is doing the sending, on the php side of things I have checked the global arrays and I have the data passed by the URL, but not the file data. I have really searched and scratched on this one so any help appreciated. String strURL = sendToURL + "?ACTION=POST&LEN=" + imgBytes.length + "&Fname=picture.png"; try{ URL urlServlet = new

问题 We built a java REST-API to receive event data (like click on a buy button) and write that data to HDFS. Essentially we open streams for every host that is sending data (in JSON) or use existing ones, enrich data with a timestamp, an event name and hostname and write it into (FS)DataOutputStream: 1 public synchronized void writeToFile(String filename, String hostname, String content) throws IOException { 2 FSDataOutputStream stream = registry.getStream(filename, hostname); 3 stream.writeBytes

问题 I am trying to use a for loop to send multiple POST requests through a DataOutputStream and then close it. At the moment, only the first index of the " trades " array list is sent to the website. Any other indexes are ignored and I'm assuming they are not being sent. I wonder if I am properly flushing the stream? Thank you!!! Examples of trades values: "101841599", "101841801" Example of code value: 85e4c22 Snippet of my code: private ArrayList<String> trades = new ArrayList<String>();

问题 I would like to create a HTML file for my report. The content in the report can be created either by using BufferedWriter#write(String) File f = new File("source.htm"); BufferedWriter bw = new BufferedWriter(new FileWriter(f)); bw.write("Content"); or by using DataOutputStream#writeBytes(String) File f = new File("source.htm"); DataOutputStream dosReport = new DataOutputStream(new FileOutputStream(f)); dosReport.wrtiteBytes("Content"); Is one of them better than the other? Why is it so? 回答1:

问题 I have a Java Client which sends UTF-8 strings to a C# TCP-Server, I'm using a DataOutputStream to send the strings. The code looks like this: public void sendUTF8String(String ar) { if (socket.isConnected()) { try { dataOutputStream.write(ar.getBytes(Charset.forName("UTF-8"))); dataOutputStream.flush(); } catch (IOException e) { handleException(e); } } } The problem is that flush doesn't seem to work right. If I send two Strings close to each other, the server receives only one message with