javaÎļþ·ÃÎÊFileÀ༰Æä¹ýÂË
import java.io.*;
class FileTest
{
public static void main(String[] args) throws Exception
{
//File f=new File("1.txt");
//f.createNewFile();
//f.mkdir();
//File f=new File("E:\\JavaLesson\\Lesson7\\1.txt");//ÔÚWindowsϵͳÏÂ,Óþø¶Ô·¾¶Ï´´½¨Îļþ,ÓÃ\\,\+×ÖĸÊÇÓÃÓÚ
תÒå×Ö·û
//f.createNewFile();
//Ïß³Ì˯ÃßÈýÃëÖÓ
File fDir=new File(File.separator);
String strFile="JavaLesson"+File.separator+"Lesson6";
File f=new File(fDir,strFile);
String[] names=f.list(new FilenameFilter()//µÃµ½ÒÔÉÏÎļþ¼ÐÏÂËùÓеÄÎļþÃûºÍĿ¼Ãû,´æ´¢ÔÚnamesÊý×éÖÐ
//½Ó¿Ú»¹¿ÉÒÔÕâÑùʵÏÖ
{
public boolean accept(File dir,String name)
{
return name.indexOf(".java")!=-1;
}
});
for(int i=0;i<names.length;i++)
{
System.out.println(names[i]);
}
}
}
Ïà¹ØÎĵµ£º
·´ÉäÊÇJavaÓïÑÔÖкÜÖØÒªµÄÒ»¸ö×é³É²¿·Ö£¬ËùÒԾʹ˻°ÌâÌÖÂÛµÄ×ÊÔ´¿ÉνÊýÖ®²»¾¡£¬ÈÕ³£¿ª·¢Ò²»á¾³£Ê¹Óõ½¹ØÓÚ·´ÉäµÄReflection
API¡£Java5.0
Tiger³öÏÖÒԺ󣬸ü¶Ô·´ÉäAPIÓÐÁËеÄÀ©Õ¹£¬¾¡¹ÜÌÖÂ۵ϰÌâºÜ¶à£¬²»¹ýÎÒ»¹ÊǾõµÃ²»¹»È«Ã棬ÓÈÆäÊǶԷºÐÍÕâÒ»¿é£¬ËùÒÔ¾ÍÎÒËùÖª£¬ÔÙ»¨Á¦Æø×ܽáÒ»·¬
Ê×ÏÈ·´ÉäµÄÈë¿ÚÊÇ´ÓClass¿ ......
ÎÊÌ⣺ÏÖÓÐn¸öÀÏÊóΧ³ÉһԲȦ£¬ÓÐһֻè´ÓÈÎÒâλÖÿªÊ¼³ÔÀÏÊó£¬Ã¿´Î¶¼¸ôÒ»¸öÀÏÊó³Ô£¬Çë¸ø³ö×îºóÒ»¸öÀÏÊóµÄ±àºÅ£¿ÌâĿҪÇóÊÇÈθøÀÏÊóÊýn£¬Êä³öè×îºó³ÔµÄÀÏÊóµÄ±àºÅ¡£
ÎҵĽⷨ£º
1.¼òµ¥µÄ·½·¨¾ÍÊÇÄ£ÄâÕâ¸ö¹ý³Ì¡£Ê¹ÓÃÒ»¸öÊý×é´ú±íÀÏÊóÊÇ·ñ±»³Ôµô£¬Ñ»·±éÀú¡£
2.¸Ä½øÒ»Ïµķ½·¨£¬ÆäʵÕâ¸öÎÊÌâ¾ÍÊÇÒ»¸öm=2µÄԼɪ·ò»·ÎÊÌâ¡£
......
ÏòÊý¾Ý¿â±£´æ¶ÔÏ󣬲ÉÓÃObjectOutputStreamÏòÊý¾Ý¿âÖ±½ÓдÈë
/**
* Title: AF
* Description: ÏòÊý¾Ý¿âÖÐдÈë¶ÔÏó²âÊÔ³ÌÐò
* Copyright: Copyright 2009 ufgov, Inc.
* Compan ......
import lotus.domino.*;
import java.io.*;
import java.util.Vector;
import jxl.*;
/*******************************************************************************
* @saveSQMessageToOracle
* @×÷ÕߣºÐ컪Ïé
* @2009Äê10ÔÂ28ÈÕ
* @˵Ã÷£ºExeclÎļþµÄµ¼Èë
********** ......
String Óë StringBufferÇø±ð:
String×Ö·û´®¶ÔÏóÊDz»¿É±äµÄ£»StringBufferÊDZ䳤ºÍ¿ÉдµÄ¶¯Ì¬×Ö·ûÐòÁУ¬¿ÉÒÔ×Ô¶¯µØÔö¼Ó¿Õ¼ä¡£
Integer var = new Integer();//ÓÐÓï·¨´íÎó
Integer var = new Integer(2);//悦﵀
javaµÄVector³ÉÔ±ÊÇÒªÓÃelementAt(i)³ÉÔ±º¯ÊýÀ´»ñµÃµÄ£¬²»ÄÜÓÃve[i]µÃµ½¡£
Vector::public Enumeration< ......