How do I convert a long to a byte[] and back in Java? I’m trying convert a long to a byte[] so that I will be able to send the byte[] over a TCP connection. On the other side I want to take that byte[] and convert it back into a double. 16 Answers 16
I think the maximum integer in python is available by calling sys.maxint. What is the maximum float or long in Python? 4 Answers 4
Primitive Data Types – oracle doc says the range of long in Java is -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807. But when I do something like this in my eclipse long i = 12345678910; it shows me “The literal 12345678910 of type int is out of range” error. There are 2 questions. 1) How do I initialize the … Read more
I keep finding both on here and Google people having troubles going from long to int and not the other way around. Yet I’m sure I’m not the only one that has run into this scenario before going from int to Long. The only other answers I’ve found were “Just set it as Long in … Read more
I am transitioning from Java to C++ and have some questions about the long data type. In Java, to hold an integer greater than 232, you would simply write long x;. However, in C++, it seems that long is both a data type and a modifier. There seems to be several ways to use long: … Read more
I just created sample BB app, which can allow to choose the date. DateField curDateFld = new DateField(“Choose Date: “, System.currentTimeMillis(), DateField.DATE | DateField.FIELD_LEFT); After choosing the date, I need to convert that long value to String, so that I can easily store the date value somewhere in database. I am new to Java and … Read more
I can never understand how to print unsigned long datatype in C. Suppose unsigned_foo is an unsigned long, then I try: printf(“%lu\n”, unsigned_foo) printf(“%du\n”, unsigned_foo) printf(“%ud\n”, unsigned_foo) printf(“%ll\n”, unsigned_foo) printf(“%ld\n”, unsigned_foo) printf(“%dl\n”, unsigned_foo) And all of them print some kind of -123123123 number instead of unsigned long that I have. 7 Answers 7
The printf function takes an argument type, such as %d or %i for a signed int. However, I don’t see anything for a long value. 7 s 7 Put an l (lowercased letter L) directly before the specifier. unsigned long n; long m; printf(“%lu %ld”, n, m);
You are multiplying ints together, and overflow occurs because the maximum integer is 2^31 – 1. Only after the multiplications does it get converted to a long. Cast the first number as a long. long days_30 = (long) 1000 * 60 * 60 * 24 * 30; or use a long literal: long days_30 = … Read more
When you convert double to int,the precision of the value is lost. For example, When you convert 4.8657 (double) to int.The int value will be 4.Primitive int does not store decimal numbers.So you will lose 0.8657. In your case,0.7 is a double value(floating point treated as double by default unless mentioned as float-0.7f). When you calculate price*much*0.7 ,the answer is a double … Read more