short

Java - Explicit Conversion from Int to Short

由 限于喜欢 提交于 2019-11-27 04:34:59
问题 Can someone please explain why this following statement: short value = (short) 100000000; System.out.println(value); Gives me: -7936 Knowing that the maximum value of a short in Java is 32767 correct? 回答1: With your value of 100 million, I get -7936. I can only get 16960 if I change 100 million to 1 million. The reason is that short values are limited to -32768 to +32767, and Java only keeps the least significant 16 bits when casting to a short (a narrowing primitive conversion, JLS 5.1.3).

2 bytes to short java

由 坚强是说给别人听的谎言 提交于 2019-11-27 03:57:31
i'm reading 133 length packet from serialport,last 2 bytes contain CRC values,2 bytes value i've make single(short i think) using java. this what i have done, short high=(-48 & 0x00ff); short low=80; short c=(short) ((high<<8)+low); but i'm not getting correct result,is it problem because signed valued? how can i solve this problem,plz help me i'm in trouble Remember, you don't have to tie yourself in knots with bit shifting if you're not too familiar with the details. You can use a ByteBuffer to help you out: ByteBuffer bb = ByteBuffer.allocate(2); bb.order(ByteOrder.LITTLE_ENDIAN); bb.put

Convert short to byte[] in Java

由 假装没事ソ 提交于 2019-11-27 03:53:22
How can I convert a short (2 bytes) to a byte array in Java, e.g. short x = 233; byte[] ret = new byte[2]; ... it should be something like this. But not sure. ((0xFF << 8) & x) >> 0; EDIT: Also you can use: java.nio.ByteOrder.nativeOrder(); To discover to get whether the native bit order is big or small. In addition the following code is taken from java.io.Bits which does: byte (array/offset) to boolean byte array to char byte array to short byte array to int byte array to float byte array to long byte array to double And visa versa. ret[0] = (byte)(x & 0xff); ret[1] = (byte)((x >> 8) & 0xff);

Does using small datatypes (for example short instead of int) reduce memory usage?

由 北战南征 提交于 2019-11-27 03:50:42
问题 My question is basically about how the C# compiler handles memory allocation of small datatypes. I do know that for example operators like add are defined on int and not on short and thus computations will be executed as if the shorts are int members. Assuming the following: There's no business logic/validation logic associated with the choice of short as a datatype We're not doing anything with unsafe code Does using the short datatype wherever possible reduce the memory footprint of my

What is the 'short' data type in C?

由 半城伤御伤魂 提交于 2019-11-27 02:46:38
问题 In the following function: void AddWordData(FILE* dataFile, short word, int* dc) { fprintf(dataFile, "%06o\n", word); ++(*dc); } the function is getting a short type. I did some search in the web but found only short int. what does it mean when a function is getting a short type? what datatype is it? 回答1: short is short for short int . They are synonymous. short , short int , signed short , and signed short int are all the same data-type. Exactly how many bits are in a short depends on the

Java: Different outputs when add/remove short and integer elements in a Set

由 喜夏-厌秋 提交于 2019-11-26 22:06:57
问题 I wasn't sure on how to ask this question. But, what is the different between these 2 lines of code? Set<Integer> a = new HashSet<Integer>(); for (int i = 0; i < 100; i++) { a.add(i); a.remove(i - 1); } System.out.println(a.size()); I expected 99 to be the output Output is 1 Set<Short> a = new HashSet<Short>(); for (Short i = 0; i < 100; i++) { a.add(i); a.remove(i - 1); } System.out.println(a.size()); I expected 99 to be the output Output is 100 回答1: The type of the expression i - 1 is int

byte array to short array and back again in java

由 橙三吉。 提交于 2019-11-26 18:45:40
I'm having some issues taking audio data stored in a byte array, converting it to a big-endian short array, encoding it, then changing it back into a byte array. Here is what I have. The original audio data is stored in audioBytes2. I am using the same format for decode with a minus on the cos function instead. Unfortunately, changing the byte and short data types is non-negotiable. short[] audioData = null; int nlengthInSamples = audioBytes2.length / 2; audioData = new short[nlengthInSamples]; for (int i = 0; i < nlengthInSamples; i++) { short MSB = (short) audioBytes2[2*i+1]; short LSB =

Convert hexadecimal string with leading “0x” to signed short in C++?

由 房东的猫 提交于 2019-11-26 18:33:36
问题 I found the code to convert a hexadecimal string into a signed int using strtol , but I can't find something for a short int (2 bytes). Here' my piece of code : while (!sCurrentFile.eof() ) { getline (sCurrentFile,currentString); sOutputFile<<strtol(currentString.c_str(),NULL,16)<<endl; } My idea is to read a file with 2 bytes wide values (like 0xFFEE), convert it to signed int and write the result in an output file. Execution speed is not an issue. I could find some ways to avoid the problem

php: number only hash?

由 六月ゝ 毕业季﹏ 提交于 2019-11-26 16:04:43
问题 In php is there a way to give a unique hash from a string, but that the hash was made up from numbers only? example: return md5(234); // returns 098f6bcd4621d373cade4e832627b4f6 but I need return numhash(234); // returns 00978902923102372190 (20 numbers only) the problem here is that I want the hashing to be short. edit: OK let me explain the back story here. I have a site that has a ID for every registered person, also I need a ID for the person to use and exchange (hence it can't be too

Convert short to byte[] in Java

由 本秂侑毒 提交于 2019-11-26 12:41:48
问题 How can I convert a short (2 bytes) to a byte array in Java, e.g. short x = 233; byte[] ret = new byte[2]; ... it should be something like this. But not sure. ((0xFF << 8) & x) >> 0; EDIT: Also you can use: java.nio.ByteOrder.nativeOrder(); To discover to get whether the native bit order is big or small. In addition the following code is taken from java.io.Bits which does: byte (array/offset) to boolean byte array to char byte array to short byte array to int byte array to float byte array to
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