Java´´½¨¶ÔÏóµÄÈýÖÖ·½·¨
Ò»¡¢new
¡¡¡¡Ê¹ÓÃjavaµÄ¹Ø¼ü×ÖnewÀ´´´½¨¶ÔÏóʵÀý¡£¹¹Ô캯ÊýÁ´ÖеÄËùÓй¹Ô캯Êý¶¼»á±»×Ô¶¯µ÷Óá£
Java´úÂ룺
¡¡¡¡ CreateInstance instance = new CreateInstance ();
¶þ¡¢clone
¹¹Ô캯Êý²»±»×Ô¶¯µ÷Óá£
¡¡¡¡Java´úÂ룺
¡¡¡¡¡¡public class CreateInstance implements Cloneable{
¡¡¡¡¡¡¡¡public CreateInstance getInstance() throws CloneNotSupportedException{
¡¡¡¡¡¡¡¡¡¡return (CreateInstance) this.clone();
}
}
¡¡¡¡Èç¹ûÐèÒª¸´ÖÆÉÏÃæµÄÄǸöobjÖ¸ÏòµÄ¶ÔÏóʵÀýʱ£¬µ÷ÓÃnew CreateInstance().getInstance()·½·¨¾ÍokÁË¡£
µ«ÊÇΪʲô²»Ö±½ÓʹÓÃnew CreateInstance().clone()ÄØ£¿
JDKÖÐObject# clone()·½·¨µÄÔÐÍÊÇ£ºprotected native Object clone() throws¡¡ CloneNotSupportedException; ·½·¨ÐÞÊηûÊÇprotected£¬¶ø²»ÊÇpublic¡£
ÕâÖÖ·ÃÎʵIJ»¿É¼ûÐÔʹµÃÎÒÃǶÔObject#clone()·½·¨²»¿É¼û¡£ËùÒÔ£¬±ØÐèÖØдObjectµÄclone·½·¨ºó²ÅÄÜʹÓá£
Java´úÂ룺
¡¡¡¡¡¡public class CreateInstance implements Cloneable{
¡¡¡¡¡¡¡¡public CreateInstance clone throws CloneNotSupportedException{
¡¡¡¡¡¡¡¡¡¡return (CreateInstance) super.clone();
}
}
ÖµµÃ×¢ÒâµÄÊÇ £ºÈç¹ûÐèҪʹÓÃclone·½·¨£¬±ØÐèʵÏÖjava.lang.Cloneable½Ó¿Ú£¬·ñÔò»áÅ׳öjava.lang.CloneNotSupportedException¡£
ÁíÍâclone·½·¨Ëù×öµÄµÄ²Ù×÷ÊÇÖ±½Ó¸´ÖÆ×ֶεÄÄÚÈÝ£¬»»¾ä»°Ëµ£¬Õâ¸ö²Ù×÷²¢²»¹Ü¸Ã×ֶζÔÓ¦µÄ¶ÔÏóʵÀýÄÚÈÝ¡£
ÏñÕâÑù×ֶζÔ×ֶεĿ½±´£¨field to field copy£©¾Í³ÉΪ"dz¿½±´"£¬clone·½·¨Ëù×öµÄÕýÊÇ"dz¿½±´"¡£
Èý¡¢newInstance
ÀûÓÃjava.lang.ClassÀàµÄnewInstance·½·¨£¬Ôò¿É¸ù¾ÝClass¶ÔÏóµÄʵÀý£¬½¨Á¢¸ÃClassËù±í
Ïà¹ØÎĵµ£º
Ò»¡¢¶àÖÖ·½Ê½¶ÁÎļþÄÚÈÝ¡£
1¡¢°´×Ö½Ú¶ÁÈ¡ÎļþÄÚÈÝ
2¡¢°´×Ö·û¶ÁÈ¡ÎļþÄÚÈÝ
3¡¢°´ÐжÁÈ¡ÎļþÄÚÈÝ
4¡¢Ëæ»ú¶ÁÈ¡ÎļþÄÚÈÝ
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java ......
<%
//header.jsp
out.println("Protocol: " + request.getProtocol() + "<br>");
out.println("Scheme: " + request.getScheme() + "<br>");
out.println("Server Name: " + request.getServerName() + "<br>" );
out.println(&quo ......
1.Listת»»³ÉΪÊý×é¡££¨ÕâÀïµÄListÊÇʵÌåÊÇArrayList)
¡¡¡¡µ÷ÓÃArrayListµÄtoArray·½·¨¡£
¡¡¡¡toArray
¡¡¡¡public <T> T[] toArray(T[] a)·µ»ØÒ»¸ö°´ÕÕÕýÈ·µÄ˳Ðò°üº¬´ËÁбíÖÐËùÓÐÔªËصÄÊý×飻·µ»ØÊý×éµÄÔËÐÐʱÀàÐ;ÍÊÇÖ¸¶¨Êý×éµÄÔËÐÐʱÀàÐÍ¡£Èç¹ûÁбíÄÜ·ÅÈëÖ¸¶¨µÄÊý×飬Ôò·µ»Ø·ÅÈë´ËÁбíÔªËصÄÊý×é¡£·ñÔò£¬½«¸ù¾ ......
1¡¢ÖÐÎÄÎÊÌâµÄÀ´Ô´
ÓÉÓÚJava
Óï
ÑÔÄÚ²¿²ÉÓÃUNICODE±àÂ룬ËùÒÔÔÚJAVA
³ÌÐòÔËÐÐʱ£¬¾Í´æÔÚ×ÅÒ»¸ö´ÓUNICODE±àÂëºÍ¶ÔÓ¦µÄ²Ù×÷ϵͳ¼°ä¯ÀÀÆ÷Ö§³ÖµÄ±àÂë¸ñʽ
ת
»»ÊäÈë¡¢Êä³öµÄÎÊÌ⣬Õâ¸öת»»¹ý³ÌÓÐ×ÅһϵÁеIJ½Ö裬Èç¹ûÆäÖÐÈκÎÒ»²½³ö´í£¬ÔòÏÔʾ³öÀ´µÄºº×־ͻá³öÊÇÂÒÂ룬Õâ¾ÍÊÇÎÒÃdz£¼ûµÄJAVA
ÖÐ
ÎÄÎÊÌâ¡£¼¸ºõËùÓÐµÄ ......