bytearrayoutputstream

Display PDF document stored in a ByteArrayOutputStream (not in a file)

由 こ雲淡風輕ζ 提交于 2019-12-13 02:18:52
问题 I've created a PDF document (with iText) in a file and can diplay it on the screen with: Document document = new Document(); PdfWriter.getInstance(document, filename); document.open(); // ... write something to document document.close(); Desktop.getDesktop().open(new File(filename)); // works fine :-) But on the machine of the customer my program will not have access to the filesystem, so I tried this: Document document = new Document(); ByteArrayOutputStream baos = new ByteArrayOutputStream(

Null Pointer Exception when trying to compress Bitmap

由 ↘锁芯ラ 提交于 2019-12-12 09:42:26
问题 I'm getting a null pointer exception when trying to compress a bitmap so I can send it to a ByteArrayOutputStream to get a byte array. I need this byte array so I can upload the image to my Parse database as a ParseFile. The log error is shown below. 01-11 23:29:41.522 32015-32015/com.example.whhsfbla.fashionnow E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.whhsfbla.fashionnow, PID: 32015 java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.graphics

Java BufferedArrayOutputStream leaks in memory

由 那年仲夏 提交于 2019-12-11 05:59:09
问题 I made a new question because this is different from my last thread. I now know what th e problem is more exact. I create a new bytearrayoutputstream ByteArrayOutputStream byteArray = new ByteArrayOutputStream(); Nothing special. Then, when I write an image to it, this way ImageIO.write(image, "gif", byteArray); the memory increases like 100 mb first, not in eclipse, but in "reality". Then it slowly increases after that each time I write a new image to that stream OR another!! and after a

Java writing to ByteArrayOutputStream memory leak

由 时光毁灭记忆、已成空白 提交于 2019-12-11 04:57:55
问题 I am writing bytes of image to ByteArrayOutputStream then sending it over socket. The problem is, when I do ImageIO.write(image, "gif", byteArray); Memory goes up VERY much, kinda memory leak. I send using this ImageIO.write(image, "gif", byteArrayO); byte [] byteArray = byteArrayO.toByteArray(); byteArrayO.flush(); byteArrayO.reset(); Connection.pw.println("" + byteArray.length); int old = Connection.client.getSendBufferSize(); Connection.client.setSendBufferSize(byteArray.length);

Not Printing created iText pdf file by ByteArrayOutputStream

由 爱⌒轻易说出口 提交于 2019-12-11 03:03:36
问题 I coded for creating iText PDF file in the memory by ByteArrayOutputStream by click of a button and print that PDF file when click of that same button same time..Code is error free.. Below is my code for the specific button; int print = JOptionPane.showConfirmDialog(null, "Do you really want to Print the Invoice ?","Print Confirmation",JOptionPane.YES_NO_OPTION); if((print)==0){ try{ String saledate = ((JTextField)dayChooser.getDateEditor().getUiComponent()).getText(); String invoice =

A resource was acquired at attached stack trace but never released - Error

由 本秂侑毒 提交于 2019-12-10 14:18:23
问题 I'm not sure why I am getting this error, 2 out of 5 times I set the wallpaper using the emulator, I get the error - "A resource was acquired at attached stack trace but never released. See java.io.Closeable for information on avoiding resource leaks." When I set the wallpaper using my phone, it works perfectly without fault. Why does it crash when I use I use the emulator? Here's my code: public class SetWallpaperAsync extends AsyncTask<String, String, String> { private Context context;

ByteArrayOutputStream/InputStream losing newline characters on S3 Import

由 感情迁移 提交于 2019-12-10 12:18:06
问题 I have the following code (pseudo code-ish)... ByteArrayOutputStream output = new ByteArrayOutputStream(); output.write("something\n".getBytes()); output.write("something\n".getBytes()); ByteArrayOutputStream input = new ByteArrayInputStream(output.getBytes()); s3.putStream(input); Then when I get the file from s3 it looks like this: somethingsomething. The newlines are gone!! I can't figure out why that is happening and internet searches have not been helpful. Does anyone have any ideas? 回答1

How to convert Byte array to ByteArrayOutputStream

由 蹲街弑〆低调 提交于 2019-12-10 01:04:54
问题 I need to convert a byte array to ByteArrayOutputStream so that I can display it on screen. 回答1: byte[] bytes = ....; ByteArrayOutputStream baos = new ByteArrayOutputStream(bytes.length); baos.write(bytes, 0, bytes.length); Method description: Writes len bytes from the specified byte array starting at offset off to this byte array output stream. 回答2: You can't display a ByteArrayOutputStream. What I suspect you are trying to do is byte[] bytes = ... String text = new String(bytes, "UTF-8"); /

Convert OutputStream to ByteArrayOutputStream

由 时光总嘲笑我的痴心妄想 提交于 2019-12-06 17:46:32
问题 I am trying to convert an OutputStream to a ByteArrayOutput Stream. I was unable to find any clear simple answers on how to do this. This question was asked in the title of the question on StackOverflow, but the body of the question aske how to change a ByteArrayStream to OuputStream . I have an OutputStream that is already created and this example given in the answer will not compile! That Question is Here I have an OutputStream that is already constructed and has a length of 44 bytes called

Null Pointer Exception when trying to compress Bitmap

由 做~自己de王妃 提交于 2019-12-05 13:23:34
I'm getting a null pointer exception when trying to compress a bitmap so I can send it to a ByteArrayOutputStream to get a byte array. I need this byte array so I can upload the image to my Parse database as a ParseFile. The log error is shown below. 01-11 23:29:41.522 32015-32015/com.example.whhsfbla.fashionnow E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.whhsfbla.fashionnow, PID: 32015 java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.graphics.Bitmap.compress(android.graphics.Bitmap$CompressFormat, int, java.io.OutputStream)' on a null object
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