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

JavaÊý×Öת×Ö·û´®Ç°Ãæ×Ô¶¯²¹0µÄʵÏÖ


±¾ÎÄÔ­Ö·£ºhttp://blogger.org.cn/blog/more.asp?name=hongrui&id=46926
/**  
 * JavaÀïÊý×Öת×Ö·û´®Ç°Ãæ×Ô¶¯²¹0µÄʵÏÖ¡£  
 *    
 */   
public class TestStringFormat {    
  public static void main(String[] args) {    
    int youNumber = 19;    
    // 0 ´ú±íÇ°Ãæ²¹³ä0    
    // 4 ´ú±í³¤¶ÈΪ4    
    // d ´ú±í²ÎÊýΪÕýÊýÐÍ    
    String str = String.format("%02d", youNumber);    
    System.out.println(str); // 01    
  }    
}   


Ïà¹ØÎĵµ£º

javaʹÓÃrocksawºÍvserv tcpipʵÏÖ»ùÓÚICMPµÄPing¹¦ÄÜ

Ò»£º×¼±¸ www.savarese.org download
 1.  rocksaw-1.0.0-src.tar.gz
 2.  vserv-tcpip-0.9.2-src.tar.gz
¶þ£º±àÒëÔ´ÎļþµÃµ½jar°ü ʹÓÃAnt
 1.  build vserv-tcpip-0.9.2-src
      ÔÚvserv-tcpip-0.9.2Ŀ¼ÏÂÃæ½¨Ò»¸ötestsĿ¼£¬È»ºóÔÚcmd´°¿ÚϽøÈë ......

java¶ÔmysqlÊý¾Ý¿âµÄµ¼Èëµ¼³ö

//µ¼³ö
String mysql="mysqldump -uroot -proot  --opt databasename > d:/test.sql";    
java.lang.Runtime.getRuntime().exec("cmd /c "+mysql);   
//µ¼Èë
String mysql="mysqladmin -uroot -proot create databasename";    
java.lang.Runt ......

javaѧϰ×ÊÁÏÕ¾

1¡¢ http://java.sun.com/ ;;(Ó¢ÎÄ)
SunµÄJavaÍøÕ¾£¬ÊÇÒ»¸öÓ¦¸Ã¾­³£È¥¿´µÄµØ·½¡£²»Óöà˵¡£
2¡¢ http://www-900.ibm.com/developerWorks/cn/ ;;
IBMµÄdeveloperWorksÍøÕ¾£¬Ó¢ÓïºÃµÄÖ±½ÓÈ¥Ó¢ÎÄÖ÷Õ¾µã¿´¡£ÕâÀï²»µ«ÊÇÒ»¸ö¼«ºÃµÄÃæÏò¶ÔÏóµÄ·ÖÎöÉè¼ÆÍøÕ¾£¬Ò²ÊÇWeb Services£¬Java£¬Linux¼«ºÃµÄÍøÕ¾¡£Ç¿ÁÒÍÆ¼ö£¡£¡£¡
3¡¢ h ......

Java CorbaʵÀý £¨Ô­×÷Õߣº×ÏϪ£©

ÕâÆªÎÄÕºÍSUN¹«Ë¾ÌṩµÄ½Ì³ÌÀàËÆ£¬Öмä¶àÁËÒ»¸öHelloImplµÄjavaÎļþ£¬±àÒëʱµÄÃüÁîÒ²¾ÍÓÐËù²»Í¬ÁË
Ô­À´µÄÃüÁîΪ£ºServer  javac HelloServer.java HelloApp/*.java
                        ......

javaÖÐÀ¬»ø»ØÊÕ»úÖÆ(gc)

ÔÚjavaÓïÖÐGC
    ¼´À¬»øÊÕ¼¯»úÖÆÊÇÖ¸jvmÓÃÓÚÊÍ·ÅÄÇЩ²»ÔÙʹÓõĶÔÏóËùÕ¼ÓõÄÄÚ´æ¡£javaÓïÑÔ²¢²»ÒªÇójvmÓÐgc£¬Ò²Ã»Óй涨gcÈçºÎ¹¤×÷¡£²»¹ý³£ÓõÄjvm¶¼ÓÐgc£¬¶øÇÒ´ó¶àÊýgc¶¼Ê¹ÓÃÀàËÆµÄËã·¨¹ÜÀíÄÚ´æºÍÖ´ÐÐÊÕ¼¯²Ù×÷¡£
    À¬»øÊÕ¼¯µÄÄ¿µÄÔÚÓÚÇå³ý²»ÔÙʹÓõĶÔÏó¡£gcͨ¹ýÈ·¶¨¶ÔÏóÊÇ·ñ±»»î¶¯¶ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ