Java¼¸ÖÖ½¨Á¢ÊµÀýµÄ·½·¨
Java¼¸ÖÖ½¨Á¢ÊµÀýµÄ·½·¨
new
ÀûÓÃJava¹Ø¼ü×ÖnewÀ´½¨Á¢¶ÔÏóʵÀýÊÇJavaÖÐ×îΪ³£¼ûÒ²ÊÇ×îΪ¼òµ¥µÄ½¨Á¢¶ÔÏóʵÀýµÄ·½·¨¡£Èô³ÌÐòд³ÉÈçÏÂÐÎʽ£¬
Ôò¿É½¨Á¢somethingÀàµÄ¶ÔÏóʵÀýºóÔÙÖ¸¶¨µ½±äÁ¿obj¡£
something obj=new something();
´Ëʱ£¬±ØÐë°ÑÀàÃû(ÔÚ´ËΪsomething)дÔÚÔ´ÂëÖ®ÄÚ¡£
clone
ÈôÀûÓÃclone·½·¨£¬Ôò¿É¸ù¾ÝÏÖÓеĶÔÏóʵÀýÀ´½¨Á¢ÀïÒ»¸öжÔÏóʵÀý¡£ÀûÓÃclone·½·¨À´½¨Á¢¶ÔÏóʵÀýÖ»ÏÞÓÚʵÏÖ
ÁËjava.lang.Cloneable½Ó¿ÚµÄÀà¡£Èç¹ûûÓÐʵÏָýӿڣ¬Ôò»áÅ׳öCloneNotSupportedExceptionÒì³£¡£Èô³ÌÐò
д³ÉÈçÏ£¬Ôò¿É¸ù¾Ýµ±Ç°¶ÔÏó±¾Éí½¨Á¢ÁíÒ»¸ö¶ÔÏóʵÀý(µ«²¢Î´ÀûÓù¹Ôì·½·¨)¡£
class Something
{
//codes
public Something createClone()
{
Something obj=null;
try
{
obj=(Something)clone();
}
catch(CloneNotSupportedException e)
{
e.printStackTrack();
}
return obj;
}
}
newInstance
ÀûÓÃjava.lang.ClassÀàµÄnewInstance·½·¨£¬¿ÉÒÔ¸ù¾ÝClassµÄ¶ÔÏóʵÀý£¬½¨Á¢¸ÃClassËù±íʾµÄÀàµÄ¶ÔÏóʵ
Àý(µ÷ÓÃÎÞ²ÎÊýµÄ¹¹Ôì·½·¨)
ÏÂÃæÊÇSomethingÀàµÄ¶ÔÏóʵÀýsomeobj£¬Ôò¿ÉÒÔÓÃÏÂÃæµÄ±í´ïʽ½¨Á¢Ò»¸öSomethingÀàµÄ¶ÔÏóʵÀý¡£
someobj.getClass().newInstance();
//or next codes
Something obj=Class.forName(Something).newIntance();
ÖµµÃ×¢ÒâµÄÊÇ£¬newIinstance·½·¨»áÅܳöInstantiationException»òÕßIllegalAcsessExceptionÒì³££¬ËùÒÔ
Ó¦¸ÃÔÚcatchÓï¾ä¿éÖв¶»ñÕâ¸öÒì³£¡£
Ïà¹ØÎĵµ£º
ÐÞ¸ÄJavaÎļþ²»ÓÃÖØÆôTomcat·þÎñµÄ·½·¨
ÔÚʹÓÃEclipse+Tomcat¿ª·¢JavaÏîÄ¿µÄʱºò³£³£»áÅöµ½ÕâÑùµÄÇé¿ö£¬ÒÑÐÞ¸ÄJavaÎļþTomcat¾Í»á×Ô¶¯ÖØÆô£¬½ÓÏÂÀ´¾ÍÊÇÂþ³¤µÄµÈ´ý·þÎñÖØÆôÍê±Ï¡£ÄÇÆäʵ´ó¶àÊýµÄJavaÎļþÐÞ¸ÄÊÇûÓбØÒªÖØÆô·þÎñµÄ£¬Ö»ÓÐÒ»Ð©ÌØ¶¨µÄJavaÎļþ£¬±ÈÈç˵ֻÓÐÖØÆô·þÎñµÄʱºò²Å»áµ÷Ó ......
ÍøÖ·×¥È¡ Java API ¸ÅÊö
http://code.google.com/intl/zh-CN/appengine/docs/java/urlfetch/usingjavanet.html
App Engine Ó¦ÓóÌÐò¿ÉÒÔÓëÆäËûÓ¦ÓóÌÐò½øÐÐͨÐÅ»òͨ¹ý×¥È¡ÍøÖ··ÃÎÊÍøÂçÉÏµÄÆäËû×ÊÔ´¡£Ó¦ÓóÌÐò¿ÉÒÔʹÓÃÍøÖ·×¥È¡·þÎñÀ´·¢³ö HTTP ºÍ HTTPS ÇëÇó²¢½ÓÊÕÏìÓ¦¡£³öÓÚЧÂʺÍÀ©Õ¹ÐÔ¿¼ÂÇ£¬ÍøÖ·×¥È¡·þÎñʹÓà G ......
ÍøÖ·×¥È¡ Java API ¸ÅÊö
http://code.google.com/intl/zh-CN/appengine/docs/java/urlfetch/usingjavanet.html
App Engine Ó¦ÓóÌÐò¿ÉÒÔÓëÆäËûÓ¦ÓóÌÐò½øÐÐͨÐÅ»òͨ¹ý×¥È¡ÍøÖ··ÃÎÊÍøÂçÉÏµÄÆäËû×ÊÔ´¡£Ó¦ÓóÌÐò¿ÉÒÔʹÓÃÍøÖ·×¥È¡·þÎñÀ´·¢³ö HTTP ºÍ HTTPS ÇëÇó²¢½ÓÊÕÏìÓ¦¡£³öÓÚЧÂʺÍÀ©Õ¹ÐÔ¿¼ÂÇ£¬ÍøÖ·×¥È¡·þÎñʹÓà G ......
×ֺţº´ó ÖРС
import java.awt.Graphics;
import java.io.File;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.SourceDataLine;
public class M ......
JavaµÄ¶ÑÊÇÒ»¸öÔËÐÐʱÊý¾ÝÇø,ÀàµÄ(¶ÔÏó´ÓÖзÖÅä¿Õ¼ä¡£ÕâЩ¶ÔÏóͨ¹ýnew¡¢newarray¡¢anewarrayºÍmultianewarrayµÈ Ö¸ÁÁ¢£¬ËüÃDz»ÐèÒª³ÌÐò´úÂëÀ´ÏÔʽµÄÊÍ·Å¡£¶ÑÊÇÓÉÀ¬»ø»ØÊÕÀ´¸ºÔðµÄ£¬¶ÑµÄÓÅÊÆÊÇ¿ÉÒÔ¶¯Ì¬µØ·ÖÅäÄÚ´æ´óС£¬Éú´æÆÚÒ²²»±ØÊÂÏȸæËß±àÒëÆ÷£¬ÒòΪËüÊÇÔÚÔËÐÐʱ ¶¯Ì¬·ÖÅäÄÚ´æµÄ£¬JavaµÄÀ¬»øÊÕ¼¯Æ÷»á×Ô¶¯ÊÕ×ßÕâЩ²»ÔÙ ......