ascii value of 0 to 9 in java

First, let's look at an example:byte [] b=newbyte[]{2,9,43}; string SS=New string (b, "Utf-8"); byte [] b1=ss.getbytes ();In this case, the B and B1 byte arrays are the same.What about the following situation?byte [] b=newbyte[]{-2,-9,43}; string SS=

The Javase foundation of java Learning Path 1# # #01.01_ Computer Basics (Computer overview) (Learn)* A: What is a computer? Examples of computer applications in life* Computer (computer) Full name: Electronic computer, commonly known as computers.

  7.1 stringClass7.2StringbufferClass 7.1 stringClassObjects of the string class cannot be changed once they are created.String constant. In the previous program, we have used the String constant multiple times.For example, "input a integer data/N"

1. regex (Regular Expression): RegularExpressions (instead of StringTokenizer); string processing tool; popular in unix, perl uses regex.It is mainly used for string matching, search, and replacement. For example, the matching IP address (with a

Before in the http://shukuiyan.iteye.com/blog/507915 article has already described this problem, but in the last written examination actually met this knowledge point, but also did wrong, embarrassed! The Apprentice is not fine. The topic is

Basic concepts of 1.URL codingURLs can only be sent over the Internet using the US-ASCII character set. Because URLs often contain characters outside of the ASCII collection, URLs must be converted to valid ASCII formats. URL encoding uses a "%"

/* When a form in a webpage is submitted using the POST method, the data content type is application/X-WWW-form-urlencoded. This type will: 1. character "a"-"Z", "a"-"Z", "0"-"9 ",". ","-"," * ", and" _ "are not encoded;2. Convert the space to

Special characters in regular expressions Character implication \ As a turn, that is, the characters usually after "\" are not interpreted in the original sense, such as the/b/matching character "B", when B is preceded by a backslash/\b/, to

First, the basic data type:byte: Smallest data type in Java, 8 bits in memory (bit), 1 bytes, value range -128~127, default value 0short: Shorter integer, 16 bits in memory, 2 bytes, range -32768~32717, default value 0int: integral type, used to

Incident I rummaged over the books that spread the case. These books are all about programming and system management. After so many years of working as a programmer, there have been countless projects and software. Every new friend asks me this