byte

问题 I have the following loop: for (byte i = 0 ; i < 128; i++) { System.out.println(i + 1 + " " + name); } When I execute my programm it prints all numbers from -128 to 127 in an infinite loop. Why does this happen? 回答1: byte is a 1-byte type so can vary between -128...127, so condition i < 128 is always true. When you add 1 to 127 it overflows and becomes -128 and so on in a (infinite) loop... 回答2: After 127, when it increments, it will become -128, so your condition won't match . byte : The

问题 This question already has answers here : What is the difference between String and string in C#? (66 answers) Closed 5 years ago . I noticed that in C# there are both a byte and Byte data type. They both say they are of type struct System.Byte and represent an 8-digit unsigned integer. So I am curious as to what the difference if any is between the two, and why you would use one over the other. Thanks! 回答1: The byte keyword is an alias for the System.Byte data type. They represent the same

问题 I am using this code string location1 = textBox2.Text; byte[] bytes = File.ReadAllBytes(location1); string text = (Convert.ToBase64String(bytes)); richTextBox1.Text = text; But when I use a file that is too big I get out of memory exception. I want to use File.ReadAllBytes in chunks. I have seen code like this below System.IO.FileStream fs = new System.IO.FileStream(textBox2.Text, System.IO.FileMode.Open); byte[] buf = new byte[BUF_SIZE]; int bytesRead; // Read the file one kilobyte at a time

问题 I am using this code string location1 = textBox2.Text; byte[] bytes = File.ReadAllBytes(location1); string text = (Convert.ToBase64String(bytes)); richTextBox1.Text = text; But when I use a file that is too big I get out of memory exception. I want to use File.ReadAllBytes in chunks. I have seen code like this below System.IO.FileStream fs = new System.IO.FileStream(textBox2.Text, System.IO.FileMode.Open); byte[] buf = new byte[BUF_SIZE]; int bytesRead; // Read the file one kilobyte at a time

问题 I was going through http://www.parashift.com/c++-faq/index.html and there I found that byte can also be 64 bits http://www.parashift.com/c++-faq/very-large-bytes.html. Is it possible and what is the use of that much amount of storage capacity for a byte? 回答1: The point isn't the usefulness of a big-byte "per se", but the fact that, for the standard, a byte is the smallest addressable quantity on the system 1 ; if a system cannot address its memory in units smaller than 64 bits, then char will

问题 Actually I need to transfer the integer value along with the bitmap via bluetooth .. Now my problem is I need to transfer the integer as single byte value.. Is tat possible to convert int as single byte value.. and retrieve it as a integer there... I tried byteValue() and the casting thing but its not usefull.. If my approach is right just help me out with this or say some other way. (Each time when I am using casting then it's returning as 65535) 回答1: What about this? public static byte[]

问题 I have a file, and the first 4 bytes of the file are the magic such as LOL . How would I be able to get this data? I imagined it would be like: byte[] magic = new byte[4]; RandomAccessFile raf = new RandomAccessFile(file, "rw"); raf.read(magic, 0, magic.length); System.out.println(new String(magic)); Output: LOL Sadly this isn't working for me. I can't find a way to fetch specific values. Does anyone see any way to solve this issue? 回答1: Use RandomAccessFile.seek() to position to where you

问题 I have a question about variable size in python, I'm using the the Ctypes because i want a 1 byte number, but when I tried to check it's size in python (via sys.getsize ) it said it was 80 byte but when i checked with the ctypes (via ctypes.sizeof ) it said it was 1 byte only, can someone tell me what is the difference and why is there 2 different sizes? is it because python is using an object or wrapper? and when its sent to c it views the real size? import sys import ctypes print("size in

问题 For converting a string, I am converting it into a byte as follows: byte[] nameByteArray = cityName.getBytes(); To convert back, I did: String retrievedString = new String(nameByteArray); which obviously doesn't work. How would I convert it back? 回答1: What characters are there in your original city name? Try UTF-8 version like this: byte[] nameByteArray = cityName.getBytes("UTF-8"); String retrievedString = new String(nameByteArray, "UTF-8"); 回答2: which obviously doesn't work. Actually that's

问题 For converting a string, I am converting it into a byte as follows: byte[] nameByteArray = cityName.getBytes(); To convert back, I did: String retrievedString = new String(nameByteArray); which obviously doesn't work. How would I convert it back? 回答1: What characters are there in your original city name? Try UTF-8 version like this: byte[] nameByteArray = cityName.getBytes("UTF-8"); String retrievedString = new String(nameByteArray, "UTF-8"); 回答2: which obviously doesn't work. Actually that's