bytearray

问题 I need a way to convert a byte[] to a String without creating a new String object. What I don't want: String s= new String(byte[], int offset, int byteCount); Is there another way to achieve the same thing without creating a new String object? I've been looking at Base64 class. Does that work? 回答1: This would only be possible if somewhere you had a cache of the strings generated from every input you're going to get. Strings are immutable, so you can't put the new data into an existing string

问题 I have written a small Cython tool for in-place sorting of structures exposing the buffer protocol in Python. It's a work in progress; please forgive any mistakes. This is just for me to learn. In my set of unit tests, I am working on testing the in-place sort across many different kinds of buffer-exposing data structures, each with many types of underlying data contained in them. I can verify it is working as expected for most cases, but the case of bytearray is very peculiar. If you take it

问题 I have byte array byteImg but I want render in my controller jpeg from byte array: def getSelfie = new HTTPBuilder() getSelfie.request(fullSelfieUrl, GET, JSON) { req -> headers.'X-DreamFactory-Session-Token' = session_id headers.'X-DreamFactory-Application-Name' = 'checkReg' response.success = { resp, reader -> assert resp.statusLine.statusCode == 200 println "Get response: ${resp.statusLine}" println "Content-Type: ${resp.headers.'Content-Type'}" resp = reader as grails.converters.JSON

问题 I have used filepicker to choose a photo from a local folder and have assigned that image to an image control in xaml page. Now that the image is there, I want to save it to a byte[] field in my sqlite database. I have tried numerous approaches from searching the internet but most involve a namespace that is not available (like System.Drawing) in windows 8.1 windows store app. Can you suggest a method? Here is the method I use to convert from byte[] array to a bitmap image. I just want the

问题 Why is this program not working? I convert a byte array to long. Then from the long I convert back to a byte array. The resulting byte array is not the same as original. class Program { static void Main(string[] args) { byte[] myBytes = { 0, 0, 0, 32, 56, 99, 87, 34, 56, 56, 34, 33, 67 , 56, 66, 72, 1, 0, 0, 56, 0, 22}; long data = BitConverter.ToInt64(myBytes, 0); byte[] byteData = BitConverter.GetBytes(data); Console.WriteLine("byte array: " + BitConverter.ToString(myBytes)); Console

问题 I have a requirement to use a native library which reads some proprietary image file formats (something about not reinventing our own wheel). The library works fine, it's just sometimes the images can get pretty big (the record I've seen being 13k x 15k pixels). The problem is my poor JVM keeps dying a painful death and / or throwing OutOfMemoryError's any time the images start getting huge. Here's what I have running //the bands, width, and height fields are set in the native code //And the

问题 I'm using iText® 5.2.1 ©2000-2012 1T3XT BVBA and Integration Designer 8.0 to create a PDF file that is exported in an byte array. I am creating a document with a fair amount of text and want to add a logo at the beginning. Part of the code that is adding the image is as follows: BASE64Decoder decoder = new BASE64Decoder(); byte[] decodedBytes = decoder.decodeBuffer(Stringovi.SLIKA1); Image image1 = Image.getInstance(decodedBytes); image1.setAbsolutePosition(30f, 770f); image1.scalePercent(60f

问题 I'm writing a Java applet that need to read some XML and image files inside a ZIP file. The Zip file will be download through HTTP and the applet is unsigned, so I need to use java.util.zip.ZipInputStream to manipulated the data. There's a problem when I'm trying to read a PNG file inside the Zip file. The steps I handle the Zip file: Download the Zip through Http URL resourceURL = new URL(source); HttpURLConnection httpConnection= (HttpURLConnection) resourceURL.openConnection();

问题 Hi I have made a small example to show my problem. Here is my web-service: package service; import javax.jws.WebMethod; import javax.jws.WebService; @WebService public class BytesService { @WebMethod public String redirectString(String string){ return string+" - is what you sended"; } @WebMethod public byte[] redirectBytes(byte[] bytes) { System.out.println("### redirectBytes"); System.out.println("### bytes lenght:" + bytes.length); System.out.println("### message" + new String(bytes));

问题 I am tring to read couple of bytes from byteData as mentioned below in my C++ code. The actual value within byteData is a binary blob byte array in BIG-ENDIAN byte order format. So I cannot simply just "cast" the byte array into a String.. byteData byte array is composed of these three things - First is `schemaId` which is of two bytes (short datatype in Java) Second is `lastModifiedDate` which is of eight bytes (long datatype in Java) Third is the length of actual `byteArray` within