what is difference between megabytes and kilobytes

The difference between the assembly machine and the brand machine: Here is a simple talk about the difference between the brand machine and their own assembly computer. Emphasize that, at present all brand machines are assembled machines, but the brand machine is a large volume of procurement after the test, printed o

) {MapNewHashmap(); Premiumphone.put ("Apple", "IPhone"); Premiumphone.put ("HTC", "HTC One"); Premiumphone.put ("Samsung", "S5"); Iterator Iterator=Premiumphone.keyset (). iterator (); while(Iterator.hasnext ()) {System.out.println (Premiumphone.get (Iterator.next ())); Premiumphone.put ("Sony", "Xperia Z"); } } }"Main" java.util.ConcurrentModificationException at java.util.hashmap$hashiterator.nextentry (Unknown SOURCE) at Java.util.hashmap$keyiterator.next (Unknow

between them. More threads require more memory space. Threads may bring more "bugs" to your program, so use them with care. The termination of a thread requires consideration of its impact on the program's operation. Typically, block model data is shared across multiple threads, and it is necessary to prevent thread deadlock situations from occurring. Summarize:the

There has been a period of time in which Twitter has been replaced by micro-letters, and it turns out that this is not the case, that Weibo has not been replaced, it has been listed and is now worth 4 billion or 5 billion of dollars. In fact, early in the micro-blog just out of time, some people say that micro-Bo will replace QQ, now QQ is not the same running,

For wait and sleep it would seem to block threads, but they are really a big difference, so here's a little bit of discussion: Difference one, Sleep () is the method inside the thread, and wait () is the method of the object class.This is relatively simple, directly re

What is the difference between compilation and interpretation? The compiler compiles every statement of the source program into machine language and saves it as a binary file, so that the computer can run the program directly in machine language, which is very fast. And the interpreter

What is the difference between the server CPU and the normal CPU? Below we find a professional literature, quickly to increase knowledge. Overall, there are six main differences between the server CPU and the common computer CPU, so let's look at it together. One, the instruction set is different Home or employment

Millet Notebook Air 4G version and ordinary version what is the difference? A, the appearance contrast Millet Notebook Air 4G version in the appearance of basic and prior to the ordinary version of Millet notebook air appearance no different, is still divided into 12.5-inch small screen core and 13.3-inch display v

the built-in flash memory of mobile phones has moved towards a ufs new era. Back to the external storage of mobile phones, but also rely on the "old" TF card (micro SD) for hard support, and it is not suitable for larger, more frequent audio, video and image file transfer work, mobile phone external memory card needs to upgrade a grade. What does a UFS memory card look like, and

, messages, photos, SkyDrive, music, videos, and more. Windows RT is an operating system designed specifically for the ARM processor for mobile office use. The biggest difference with Windows 8 is the inability to install PC desktop software. The biggest benefit of Windows RT is low hardware requirements and long batt

To discuss the difference between the structure (struct) and Class (class), what do you think the structure (struct) has to do with the class instead? --------------------------------------------------------------- Ask too many people, simply tidy up a FAQ. First of all, the question should be discussed only syntactically, and if there is a discussion of differ

Original linkIn the JavaScript world, there are two words that are often mentioned, that is shim and polyfill, what are they referring to, and what is the difference? In this article, we will briefly give you a brief introduction of their relationship and differences.ShimA s

What is the difference between the 32-bit and 64-bit Windows system? How do I determine 32-bit and 64-bit systems? Whether the computer architecture is 32-bit or 64-bit depends on the processor (CPU) inside the machine. Currently, most computer processors belong to one of these two categories. 64-bit processors are m

POP3 protocol, IMAP (Internet Message Access Protocol) provides user-oriented mail collection services. The commonly used version is IMAP4. IMAP4 improves POP3, users can browse the headers to decide whether to collect, delete, and retrieve specific portions of a message, or to create or change a folder or mailbox on the server, which supports online and disconnected operations in addition to the offline operating mode of the POP3 protocol. It provid

What is the difference between 1.HashMap and Hashtable?HashMap is not thread-safe and its operation method is not synchronizedHashMap allow key to be empty　　　　Hashtable is thread-safe and its operation method has been synchronized

Set (0.02 sec)mysql> INSERT into Testint values (336, 257);Query OK, 1 row affected, 1 Warning (0.02 sec)Mysql> select * from Testint;+------+------+| ID | col2 |+------+------+| 256 | 127 || 336 | 127 |+------+------+2 rows in Set (0.00 sec)mysql> INSERT into Testint values (336, 255);Query OK, 1 row affected, 1 warning (0.03 sec)Mysql> select * from Testint;+------+------+| ID | col2 |+------+------+| 256 | 127 || 336 | 127 || 336 | 127 |+------+------+3 Rows in Set (0.00 sec)Mysql>Take a loo

[Interview Questions] What is the difference between sizeof and strlen? sizeofstrlen Example: constchar * p = "Hello World"; char p [] = "Hello World"; what is the difference between length and occupied space? A: You can use strle

According to the content and according to the adjustment of the window you may not be clear, let's see, what is the difference between the bottom? 1, open Word, on the Table menu, "Insert" in the Select "Table" 2, we see the adjustment table according to the content and according to the window two types, these two types of inverted bottom

When it comes to wireless, some people think of wif some people think of WLAN, what is the difference between WiFi and WLAN? In short, WIFI is the acronym for Wireless Fidelity (wireless fidelity), a technology that allows computers, mobile phones, and so on to interconnect wirelessly. And WLAN refers to wireless LAN

What is the difference between Iphone6 mobile phone contract machine and bare metal? For the contract machine, I believe that everyone will be unfamiliar, in many outdoor billboards, you can see a variety of very attractive "0 yuan buy machine", advertising slogans, the contract machine is actually the network operato