Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

Õë¶Ôjava»­ÃæÉÁ˸


     ÈçÌ⣡½â¾öµÄ·½·¨ÊÇÔö¼ÓÒ»¸öÐé±³¾°¡£Ö®ºó°ÑÐé±³¾°Ôö¼Óµ½Ô­À´µÄFrameÉÏ¡£ÓÉÓÚrepaint()µ½paint()ÖмäÉæ¼°µ½update(),ËùÒÔ½â¾öÎÊÌâµÄ
¹Ø¼üÊÇÔÚÖØÐ´update(),ÔÚÕâ¸ö·½·¨ÖÐʵÏÖÐé±³¾°µÄÌí¼Ó~~
   @Override
public void update(Graphics g) 
{
if(offScreenImage == null)
{
offScreenImage = this.createImage(800, 600);
}
/*
*¶¨ÒåÔÚÐé±³¾°Öл­µÄ“»­±Ê”
*/

Graphics graOffScreen = offScreenImage.getGraphics();

/*
*ÖØ»­Ðé±³¾° 
*/
Color c = graOffScreen.getColor();
graOffScreen.setColor(Color.GREEN);
graOffScreen.fillRect(150, 150, 800, 600);
graOffScreen.setColor(c);


paint(graOffScreen);

g.drawImage(offScreenImage, 0, 0, null);
}


Ïà¹ØÎĵµ£º

Java NIO APIÏê½â

 
Java NIO APIÏê½â
ÔÚJDK
1.4ÒÔǰ£¬JavaµÄIO²Ù×÷¼¯ÖÐÔÚjava.ioÕâ¸ö°üÖУ¬ÊÇ»ùÓÚÁ÷µÄ×èÈû£¨blocking£©API¡£¶ÔÓÚ´ó¶àÊýÓ¦ÓÃÀ´Ëµ£¬ÕâÑùµÄAPIʹÓúܷ½
±ã£¬È»¶ø£¬Ò»Ð©¶ÔÐÔÄÜÒªÇó½Ï¸ßµÄÓ¦Óã¬ÓÈÆäÊÇ·þÎñ¶ËÓ¦Óã¬ÍùÍùÐèÒªÒ»¸ö¸üΪÓÐЧµÄ·½Ê½À´´¦ÀíIO¡£´ÓJDK 1.4Æð£¬NIO
API×÷Ϊһ¸ö»ùÓÚ»º³åÇø£¬²¢ÄÜÌṩ·Ç×èÈû(non-blo ......

javaÖеÄÒ»¸öMyPoint·½·¨

Éè¼ÆÒ»¸öCircleÀ࣬ÆäÊôÐÔΪԭµã£¨ÀàÐÍΪÀàMyPoint£©ºÍ°ë¾¶£¬²¢Îª´ËÀà±àдÒÔÏÂÈý¸ö·½·¨£º
Ò»¡¢¼ÆËãÔ²µÄÃæ»ýµÄcalArea£¨£©·½·¨£»
¶þ¡¢¼ÆËãÖܳ¤µÄcalLength£¨£©·½·¨£»
Èý¡¢boolean inCircle£¨MyPoint mp£©·½·¨£¬¹¦ÄÜÊDzâÊÔ×÷Ϊ²ÎÊýµÄij¸öµãÊÇ·ñÔÚµ±Ç°¶ÔÏóÔ²ÄÚ£¨Ô²ÄÚ£¬°üÀ¨Ô²ÉÏ·µ»Øtrue£¬ÔÚÔ²Íâ·µ»Øfalse£©¡£
³ÌÐò£º
clas ......

jsp,java±àÂëÔ­Àí

Îļþ´ò¿ªÊ±ºòÊÇͨ¹ýÎļþÍ·À´È·¶¨ÎļþµÄ±àÂë
StreamReader   sr=new   StreamReader(@"F:\cym\temp\1.txt");  
  sr.CurrentEncoding   //·µ»Ø±àÂë
ÊÀ½çÉϵĸ÷µØÇø¶¼Óб¾µØµÄÓïÑÔ¡£µØÇø²îÒìÖ±½Óµ¼ÖÂÁËÓïÑÔ»·¾³µÄ²îÒì¡£ÔÚ¿ª·¢Ò»¸ö¹ú¼Ê»¯³ÌÐòµÄ¹ý³ÌÖУ¬´¦ÀíÓïÑÔÎ ......

¡¶ÓûΪJava¼¼Êõ´óÅ£ËùÐèµÄ25¸öѧϰҪµã¡·¶Áºó¸Ð

½ñÈÕ¶Áµ½csdnµÄÐÂÎÅ¡¶ÓûΪJava¼¼Êõ´óÅ£ËùÐèµÄ25¸öѧϰҪµã¡·£¬Á˽âÒª×öÒ»¸öJava¼¼Êõ´óÅ£¿É²»ÊÇÒ»°ãÒ»°ãµÄ£¬ÌØÊÕ¼ÔÚ´Ë£ºÒÔ±Þ²ß×Ô¼º²»¶Ïѧϰ£º
1. ÄãÐèÒª¾«Í¨ÃæÏò¶ÔÏó·ÖÎöÓëÉè¼Æ(OOA/OOD)¡¢É漰ģʽ(GOF£¬J2EEDP)ÒÔ¼°×ÛºÏģʽ¡£ÄãÓ¦¸ÃÁ˽âUML£¬ÓÈÆäÊÇclass¡¢object¡¢interactionÒÔ¼°statediagrams¡£
2. ÄãÐèҪѧϰJavaÓïÑÔ ......

java¶ÁÈ¡ excel Îı¾

 package javatest1014;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
public class ReadExcel{
 
 public static void main(String[] args){
  
  jxl.Workbook workbook=getWorkBook();
        ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ