long-integer

I'm trying to declare a long value in Java, which unfortunately does not work. This is my code. It results in the following error message: "The literal 4294967296 of type int is out of range". long bytes = 4294967296; I need this value to make a file filter that filters out files that are bigger than 4294967296 bytes (4GB). The other way round works without any issues ( long size = file.length() ) with every file size, which is why I can't figure out why my declaration is not working. Add L to the end of the number: long bytes = 4294967296L; To answer your question title, the maximum value of

I'm very new to dealing with bits and have got stuck on the following warning when compiling: 7: warning: left shift count >= width of type My line 7 looks like this unsigned long int x = 1 << 32; This would make sense if the size of long on my system was 32 bits. However, sizeof(long) returns 8 and CHAR_BIT is defined as 8 suggesting that long should be 8x8 = 64 bits long. What am I missing here? Are sizeof and CHAR_BIT inaccurate or have I misunderstood something fundamental? long may be a 64-bit type, but 1 is still an int . You need to make 1 a long int using the L suffix: unsigned long x

I understand that both java.lang.Long and java.math.BigInteger can hold very large natural numbers. I also know Long's max value, but what is the max value for BigInteger? And aside from capacity, would BigInteger ever perform better when working with generally large integers that still fall in Long's range? Question Is the only consideration: is my value too large for Long? AHungerArtist BigInteger is capable of holding far bigger numbers than Long. BigInteger seems capable of holding (2 ^ 32) ^ Integer.MAX_VALUE, though that depends on the implementation (and, even if truly unbounded in the

I want to convert long to int . If the value of long > int.MaxValue , I am happy to let it wrap around. What is the best way? Just do (int)myLongValue . It'll do exactly what you want (discarding MSBs and taking LSBs) in unchecked context (which is the compiler default). It'll throw OverflowException in checked context if the value doesn't fit in an int : int myIntValue = unchecked((int)myLongValue); Convert.ToInt32(myValue); Though I don't know what it will do when it's greater than int.MaxValue. realbart Sometimes you're not actually interested in the actual value, but in its usage as

I want to change a values in byte array to put a long timestamp value in in the MSBs. Can someone tell me whats the best way to do it. I do not want to insert values bit-by-bit which I believe is very inefficient. long time = System.currentTimeMillis(); Long timeStamp = new Long(time); byte[] bArray = new byte[128]; What I want is something like: byte[0-63] = timeStamp.byteValue(); Is something like this possible . What is the best way to edit/insert values in this byte array. since byte is a primitive I dont think there are some direct implementations I can make use of? Edit: It seems that