javaÊìϤVectorµÄ´ó´ó°ï°ïæ¡£
Á½¸öÎÊÌ⣺
1¡£ÎÒÒª´æ´¢×Ö·û´®£¬Óкܶà¸ö×Ö·û´®£¬ÇÒ²»ÖªµÀ¾¿¾¹ÓжàÉÙ¸ö¡£
ÕâÖÖÇé¿öÏ£ºString[]¾Í²»ÄÜÓÃÁË£¬ÒòΪ²»ÖªµÀ¸öÊý£¬Ã»°ì·¨¶¨ÒåºÍ³õʼ»¯¡£
ÎÊ£ºÓÃʲôÓÐЧµÄ·½·¨½â¾öÕâ¸öÎÊÌ⣿
2¡£ÎÒÏÖÔÚÓÃVectorÀ´´æ£¬´æÊÇ´æÁË£¬ÒªÈ¡ºÃÏñÒ²²»ÈÝÒס£
È磺Vector typeT = new Vector();
typeT.add("asdfaf");//ΪÁË˵Ã÷ÎÊÌâÁÙʱ±íʾΪһ¸ö×Ö·û´®
System.out.println(typeT.get(0));//¿ÉÒÔÕýÈ·ÏÔʾΪasdfaf
typeTotal[0] = (String)typeT.get(0);»òÕßtypeTotal[0] = typeT.get(0).toString();
System.out.println(typeTotal[0]);//ÏÔʾ³öÀàËÆÓÚÄÚ´æµØÖ·µÄ[Ljava.lang.String;@18a49e0¡£
ÎÊ£ºÎÒÓÖ¸ÃÔõôȡ³öÀ´ÄØ£¿
typeTotal[0]ÊÇʲô¶«Î÷
1 Äã¿ÉÒÔÓÃListѽ£¬±ÈÈçarraylist
2 ÒªÕâôȡ
Vector typeT = new Vector();
typeT.add("asdfaf");
System.out.println(typeT.get(0));
Java code:
Vector typeT = new Vector();
typeT.add("asdfaf");//ΪÁË˵Ã÷ÎÊÌâÁÙʱ±íʾΪһ¸ö×Ö·û´®
System.out.println(typeT.get(0));//¿ÉÒÔÕýÈ·ÏÔʾΪasdfaf
String s = typeT.get(0).toString();//»òÕßtypeTotal[0] = typeT.get(0).toString();
System.out.println(s);
ÕâÑùûÓÐÎÊÌâѽ
¶Ô²»Æð£¬ÍüÁË˵Ã÷£º
String[] typeTotal = new String[typeT.size()];//ÊÇÒ»¸öStringÊý×飬³¤¶ÈÓÉtypeT.size()¾ö¶¨¡£ÎÒµÄ×ö·¨ÊÇÏÈÓÃV
Ïà¹ØÎÊ´ð£º
ÎÊÌâÃèÊö£ºÐ´ÈÕÖ¾¹¦ÄÜ£¬Ð´ºÃµÄдÈÕÖ¾·þÎñ£¬ÆäËûÓû§Í¨¹ýhttpµ÷Ó÷þÎñ£¬´«Èë²ÎÊý£¬È»ºó¼Ç¼ÈÕÖ¾£¬
ÎҵķþÎñ¸ÃÔõôд£¬ ±ðÈËÔõôͨ¹ýhttpµ÷ÓÃÎҵķþÎñ£¬ÎÒÓÃwebserviceдºÃÁËÒ»¸ö£¬¿ÉÊDz¢·¢ÓÐÉÏÏߣ¬Ïë¸ÄÓ ......
ÓÃRandomAccessFileдÈëTXTÎļþ²é¿´Ê±ÊÇÂÒÂ룬ÇëÎÊÓÐʲô·½·¨¿ÉÒÔд³É¿É¶ÁµÄÎļþ£¬²»ÊÇÓÃÆäËûµÄÎļþ²Ù×÷£¬¾ÍÊÇÖ»ÓÃRandomAccessFileµÄ·½·¨ÊÇ·ñ¿ÉÒÔʵÏÖ£¿
Java code:
import java.io.*;
public class RandomAcce ......
select a.name as parename ,b.name as chliname,a.typeId as paretype,b.typeid as chlitype from prodkind a inner join prodkind b where a.typeId=b.parentId
²é³öÀ´µÄ×Ö¶ÎÃû³Æ²»ÊÇ parename ¶øÊÇname
se ......
ÎÒÏÖÔÚÏëÖªµÀÒ»¸ö²»³£ÓõÄjava¹Ø¼ü×Ö,
²»ÊÇvolatile,transate;
ÓеãÏóLocalThreadÀà,µ«ÓÖ²»ÊÇ,ÊǸöÍêȫСдµÄ¹Ø¼ü×Ö,ºÃÏóÊÇlocal...ɶµÄ;
ÔÀ´¼û¹ý¼¸»Ø;½ñÌìÔõôҲÕÒ²»µ½ÁË;
Locale
Locator
ÒýÓÃ
Locale
L ......
import java.sql.Connection;
import java.sql.Date;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class QueryTest&n ......