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1, an overview of the integerRequirement 1: put 100 binary, octal, hexadecimal calculation of this dataRequirement 2: Determine whether a data is within the range of int.First you need to know how big the int is?In order to perform more operations on the basic data types and to operate more conveniently, Java provides the corresponding class type for each of the basic data types. The wrapper class Type.Class type wrapper class typeBYTE byteShort Shortint IntegerLong Longfloat floatDouble DoubleC

Windows Media Player for Windows XP offers unmatched choice and flexibility for digital media. It makes it easy to manage digital music libraries, digital photo galleries, and digital video libraries on your computer, and you can sync them to a variety of portable devices so that you can enjoy them anytime, anywhere. English update only, release date is 3/13/2007. The Chinese version is still 2007/1/15. Do

rows affected (0.01 sec)• Completely delete the database:Drop database db1;mysql> drop Database db1; Query OK, 1 row affected (0.01 sec) 13.6 MySQL Database backup recovery• Backup library:Mysqldump-u User name-p password Database > backup data file path[Email protected] ~]# mysqldump-uroot-p123456 mysql >/tmp/mysql.sql(Too much data is not listed)• Recovery library:Mysql-u User name-p password Database [Email protected] ~]# mysql-uroot-p123456 MYSQL2 • Backup table:Mysqldump-u Use

follows:Server{Listen 80;server_name test.com test1.com test2.com;Index index.html index.htm index.php;root/data/wwwroot/test.com;if ($host! = ' test.com ') {Rewrite ^/(. *) $ http://test.com/$1 permanent;}} Test results:Knowledge Points: server_name support to write multiple domain names, which is different from httpd, httpd can only be done by the server alias to do this. Permanent is permanently redirected, the status code is 301, and if written as redirect, the status code is 30

/**/ /// /// The rule for a column number is as follows: 1, 1, 2, 3, 5, 8, 13, 21, and 34 calculate the number of 30th digits, which is implemented using a recursive algorithm. (C # language) /// /// /// Public Int Getnumberatpos ( Int Pos) { If (Pos = 0 | Pos = 1 ) {Return1;} Int Res = Getnumberatpos (Pos - 1 ) + Getnumberatpos (Pos -

Table joins are divided into horizontal table joins and longitudinal table joinsThere are three ways to connect a horizontal table:1. Select column name, column name from table name, table name where table name. column name = table name. Column NameSelect Student. Sno,sname,cno,degree from Student,scorewhere Student.sno = Score.sno2, sub-query methodSelect Sno,sname, (select CNO from score where Student.sno=score.sno) from Student3. Select column name, column name from table name join table name