MYSQLºÍjavaÖеÄÊýÖµ·¶Î§
91KGE
mysqlÊýÖµ·¶Î§
tinyint -128~127 0~255
smallint -32768~32767 0~65535
mediumint -8388608~8388607 0~16777215
int -2147483648~2147483647 0~4294967295
bigint -9223372036854775808~9223372036854775807 0~18446744073709551615
javaÖÐ
byte -127~128
short -32768~32767
int -2147483648~2147483647
long -9223372036854775808~9223372036854775807
Ïà¹ØÎĵµ£º
//¹þ¸¥Âü±àÂëµÄʵÏÖÀà
public class HffmanCoding {
private int charsAndWeight[][];// [][0]ÊÇ ×Ö·û£¬[][1]´æ·ÅµÄÊÇ×Ö·ûµÄȨֵ£¨´ÎÊý£©
private int hfmcoding[][];// ´æ·Å¹þ¸¥ÂüÊ÷
private int i = 0;// Ñ»·±äÁ¿
private String hcs[];
public HffmanCoding(int[][] chars) {
// TODO ¹¹Ôì·½·¨
......
´Ë´¦ÔËÓÃÁËÒ»¸ö¼¯³ÉµÄxampp¼Ü¹¹¡£²»Óõ¥¶ÀÈ¥°²×°apache·þÎñÆ÷£¬mysqlÊý¾Ý¿â£¬µÈµÈ¡£
£¨Ò»£©XamppµÄ°²×°
ÏÂÔØxampp
1. Ë«»÷xampp£¬µã»÷ÏÂÒ»²½£¬ÏÂÒ»²½£¬ÈçÊÇ£¬¾Í°²×°ÁËxampp¡££¨´Ë´¦°²×°ÔÚÁËc£º\sandboxÏÂÃæÁË£©
2. ½øÐÐxampp°²×°ÊÇ·ñ³É¹¦µÄ²âÊÔ£º
´ò¿ª£ºc:\ ......
ÏÔʾËùÓеÄÓû§±í
select tablename from sys.systables where tabletype='T'
´´½¨±í
Create Table MAPS(
ID integer not null generated always as identity(start with 1,increment by 1),
map_name varchar(40),
area_int int,
area decimal ......
Ò»¡¢ JDK (Java Development Kit)
JDKÊÇÕû¸öJavaµÄºËÐÄ£¬°üÀ¨ÁËJavaÔËÐл·¾³£¨Java Runtime Envirnment£©£¬Ò»¶ÑJava¹¤¾ßºÍJava»ù´¡µÄÀà¿â(rt.jar)¡£²»ÂÛʲçÛJavaÓ¦Ó÷þÎñÆ÷ʵÖʶ¼ÊÇÄÚÖÃÁËij¸ö°æ±¾µÄJDK¡£Òò´ËÕÆÎÕJDKÊÇѧºÃJavaµÄµÚÒ»²½¡£×îÖ÷Á÷µÄJDKÊÇSun¹«Ë¾·¢²¼µÄJDK£¬³ýÁËSunÖ®Í⣬»¹Óкܶ๫˾ºÍ×éÖ¯¶¼¿ª· ......