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¸ß¼¶££JavaÏß³ÌÔËÐÐÕ»ÐÅÏ¢µÄ»ñÈ¡
·¢²¼Ê±¼ä£º2007.11.14 05:10 À´Ô´£ºÈüµÏÍø¼¼ÊõÉçÇø ×÷Õߣºbaocl
Ò»¡¢ÎÊÌâµÄÒýÈë
ÎÒÃÇÔÚJava³ÌÐòÖÐʹÓÃÈÕÖ¾¹¦ÄÜ£¨JDK Log»òÕßLog4J£©µÄʱºò£¬»á·¢ÏÖLogϵͳ»á×Ô¶¯°ïÎÒÃÇ´òÓ¡³ö·á¸»µÄÐÅÏ¢£¬¸ñʽһ°ãÈçÏ£º
[ÔËÐÐʱ¼ä] [µ ......
Java™ ±¾»ú½Ó¿Ú£¨Java Native Interface£¬JNI£©ÊÇÒ»¸ö±ê×¼µÄ Java API£¬ËüÖ§³Ö½« Java ´úÂëÓëʹÓÃÆäËû±à³ÌÓïÑÔ±àдµÄ´úÂëÏ༯³É¡£Èç¹ûÄúÏ£ÍûÀûÓÃÒÑÓеĴúÂë×ÊÔ´£¬ÄÇô¿ÉÒÔʹÓà JNI ×÷ΪÄú¹¤¾ß°üÖеĹؼü×é¼þ —— ±ÈÈçÔÚÃæÏò·þÎñ¼Ü¹¹£¨SOA£©ºÍ»ùÓÚÔÆµÄϵͳÖС£µ«ÊÇ£¬Èç¹ûÔÚʹÓÃʱδעÒâijЩÊÂÏÔò ......
public List createArrayList(String FilePath,String FileName){
List list =new ArrayList();
FileName=FilePath+"\\"+FileName;
File file=new File(FileName);
String encoding="GBK";//·ÀÖ¹ÂÒÂë Õâ±àÂëÐèÒª¸ù¾Ý×Ô¼ºµÄ²Ù ......
package chape8;
/**
* µÚ8ÕÂ
* µÚ46條£º
* for-eachÑ環優ÏÈÓÚforÑ環
* for(Element e : c)
* {
* dosomthing(e);
* }
* Õâ¸öÊÇjava1.5ÒÔÉϵİ汾µÄforÑ»·µÄÊ×ÏÈ¿¼ÂǵÄд·¨
* ÒÔÏÂÊÇjava1.5ÒÔǰµÄ寫·¨
* for (Iterator it = c.iterator();it.hasNext();)
{ ......
package chape8;
import java.math.BigDecimal;
/**
* 8-48
* Èç¹ûÏëÒªÖªµÀ¾«È·µÄ´ð°¸£¬¾ÍÒª±ÜÃâʹÓÃdoubleºÍfloat
¶ÔÓÚ½ðÈÚÐÐÒµÀ´Ëµ£¬¶ÔÊý¾ÝµÄÑÏÕûÐÔÒªÇóÊǺܸߵ쬲»ÈݰëµãÂí»¢£¬
ÄÇ´ó¼Ò¶¼ÖªµÀÔÙÎÒÃǵÄJavaÓïÑÔÀïÃæÓÐÁ½¸ö¸¡µãÊýÀàÐ͵ıäÁ¿floatºÍdouble£¬
¿ÉÄÜ´ó¼Ò»áÈÏΪËûÃǵľ«¶È¶ÔÓÚ½ðÈÚÐÐÒµÕâÑù¶ÔÊý×Öà ......