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1. Top results related to how are bytes written to the filestream in java?

   • How are integers cast to bytes in Java?

     Top Answer

     Answered Mar 16, 2010 · 31 votes

     This is called a narrowing primitive conversion. According to the spec:

     A narrowing conversion of a signed integer to an integral type T simply discards all but the n lowest order bits, where n is the number of bits used to represent type T. In addition to a possible loss of information about the magnitude of the numeric value, this may cause the sign of the resulting value to differ from the sign of the input value.

     So it's the second option you listed (directly copying the last 8 bits).

     I am unsure from your question whether or not you are aware of how signed integral values are represented, so just to be safe I'll point out that the byte value 1111 1111 is equal to -1 in the two's complement system (which Java uses).

     Other Answers

     Answered Mar 16, 2010 · 6 votes

     int i = 255;-byte b = (byte)i;-

     So the value of be in hex is 0xFF but the decimal value will be -1.

     int i = 0xff00;-byte b = (byte)i;-

     The value of b now is 0x00. This shows that java takes the last byte of the integer. ie. the last 8 bits but this is signed.

     Other Answers

     Answered Mar 16, 2010 · 4 votes

     or does it just directly copy the last 8 bits of the integer

     yes, this is the way this casting works

     Check all answers on Stack Overflow

     1/5

   • How to indent a multi-line paragraph being written to the console in java

     Top Answer

     Answered May 23, 2017 · 45 votes

     NOTE: The approach described below does not meet the updated requirements described by @BillMan in the question's comments. This will not automatically wrap lines that are longer than the console line length - only use this approach if wrapping isn't an issue.

     String output = <your string here>String indented = output.replaceAll("(?m)^", "\t");-

     If you're unfamiliar with Java regular expressions, it works as follows:

     • (?m) enables multiline mode. This means each line in output is considered individually, instead of treating output as a single line (which is the default).
     • ^ is a regex matching the start of each line.
     • \t causes each match of the preceding regex (i.e. the start of each line) to be replaced by a tab character.

     As an example, the following code:

     String output = "foo\nbar\nbaz\n"String indented = output.replaceAll("(?m)^", "\t");System.out.println(indented);

     Produces this output:

     Check all answers on Stack Overflow

     2/5

   • How are the primitive data types in java defined/written?

     Top Answer

     Answered Jul 30, 2018 · 2 votes

     No, there is no such thing as int.java or double.java These low level types are hard-coded at the JVM level. They are primitive types even at byte-code level (e.g. different bytecodes apply to operands of 4 bytes as opposed to 8 bytes, or to integral types as opposed to floating point types). You may want to study the implementation of one or more open source Java VMs to see how they are handled (https://en.wikipedia.org/wiki/List_of_Java_virtual_machines#Free_and_open_source_implementations). Also, even compilers treat them specially and make certain assumptions about them, e.g. for optimization purposes.

     The other reason for them not having equivalent Java classes (unlike the capitalized ones, java.lang.Integer, java.lang.Double etc.) is that they don't have methods of their own, that you can call, for example with the dot notation. When you do use a primitive type as an object, a conversion takes place (known as autoboxing -- https://en.wikipedia.org/wiki/Object_type_(object-oriented_programming)#Autoboxing) where the primitive type is converted to one of the wrapper types, transparently for the programmer. It is worth having a look at the source code of these classes, for some interesting internal functionality.

     Also you cannot create instances of them, by using the new keyword. The compiler or the VM allocate space for them, as necessary, on the stack, as object or class fields, or even directly in the code.

     Check all answers on Stack Overflow

     3/5

   • How to Get the HTTP Response Size in Java (in Bytes)

     Top Answer

     Answered Mar 13, 2018 · 4 votes

     Since the response is written continuously, you have two options:

     • wrap HttpServletResponse in order to return your own OutputStream wrapper, which in turn counts the bytes written to it
     • use the tomcat Valve logging

     Check all answers on Stack Overflow

     4/5

   • How many bytes are used to store a Boolean value in Java?

     Top Answer

     Answered May 23, 2017 · 1 votes

     Oracle has a complete list of the data-types and sizes here: http://download.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html

     Unfortunately, that page states:

     This data type represents one bit of information, but its "size" isn't something that's precisely defined.

     This answer seems to provide the reasoning of why the size isn't precisely defined.

     Check all answers on Stack Overflow

     5/5

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2. www.baeldung.com › java-outputstream-byte-arrayConvert an OutputStream to a Byte Array in Java | Baeldung

   www.baeldung.com › java-outputstream-byte-array

   • Cached

   Apr 19, 2024 · We saw how to read the file resulting from a FilеOutputStrеam using FileUtils.readFileToByteArray () from the Apache Commons IO library, and a more general approach using a custom DrainablеOutputStrеam to take a copy of the written bytes for a given OutputStrеam.

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4. www.baeldung.com › java-convert-byte-array-toConvert byte[] to MultipartFile in Java | Baeldung

   www.baeldung.com › java-convert-byte-array-to

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   Apr 19, 2024 · Overview. In this tutorial, we’ll take a look at how to convert a byte array to MultipartFile. MutlipartFile is an interface provided by Spring to receive files in multiple request chunks, so we need some implementation to instantiate a MultipartFile object.

5. stackoverflow.com › questions › 78394183java - If you use FileInputStream's read (byte b []) to read ...

   stackoverflow.com › questions › 78394183

   • Cached

   3 days ago · Asked today. Modified today. Viewed 6 times. -1. Here are code like this: @Test. void test_9() throws Exception { long startTime = System.currentTimeMillis(); //demo.mp4 is 100M. try (FileInputStream fis = new FileInputStream("demo.mp4")) { byte[] bytes = new byte[8 * 1024]; int len; while ((len = fis.read(bytes)) != -1) {}

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   How to write byte using bytestream to a file in Java?

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   Java Program to Write Bytes using ByteStream - GeeksforGeeks

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   What is byte stream in Java?

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   How to read/write data using byte streams in Java?

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   How do I open a FILESTREAM?

   • In your code, you can use System.IO.OpenRead and System.IO.OpenWrite to open a filestream, and pass it on to StreamReader or StreamWriter, depending on what you’re trying to do. Now read and write from the file! Ok – code samples make this easier to understand. Say you want to read stuff from this file on your app’s startup.

   How to read and write files in a MAUI application? - #SharePointProble…

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7. www.edureka.co › blog › file-handling-in-javaFile Handling in Java – How To Work With Java Files? - Edureka

   www.edureka.co › blog › file-handling-in-java

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   Sep 30, 2021 · 1. Byte Stream. This mainly incorporates with byte data. When an input is provided and executed with byte data, then it is called the file handling process with a byte stream. 2. Character Stream is a stream which incorporates with characters. Processing of input data with character is called the file handling process with a character stream.

8. www.koskila.net › how-to-read-and-write-files-in-aHow to read and write files in a MAUI application?

   www.koskila.net › how-to-read-and-write-files-in-a

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   Apr 18, 2024 · You can do something like this: private static async Task<string> ReadFile() { try { using Stream fileStream = System.IO.File.OpenRead(filePath); using StreamReader reader = new StreamReader(fileStream); var c = await reader.ReadToEndAsync(); return c; } catch (Exception ex) { Console.Write(ex.Message); } return new List<NappiObject>(); } And ...

9. javabeat.net › understanding-java-literals-withUnderstanding Java Literals With Examples - JavaBeat

   javabeat.net › understanding-java-literals-with

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   21 hours ago · A literal in Java is a fixed value directly written into the code and cannot be changed during program execution. What Are Different Types of Literals in Java. Java supports the below-listed Types of “Literals” and these types are further classified into several subtypes: Integral Literals; Floating-Point Literal; Char or Character Literals

10. www.baeldung.com › java-printwriter-write-vs-printPrintWriter write() vs print() Method in Java | Baeldung

    www.baeldung.com › java-printwriter-write-vs-print

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    Apr 16, 2024 · Specifically, we’ll discuss two of its methods, write () and print (), and their differences. The PrintWriter class prints formatted representations of objects to a text-output stream. Methods in this class never throw I/O exceptions. However, there is the possibility that some of its constructors may.