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¿ ......
ÏòÊý¾Ý¿â±£´æ¶ÔÏ󣬲ÉÓÃObjectOutputStreamÏòÊý¾Ý¿âÖ±½ÓдÈë
/**
* Title: AF
* Description: ÏòÊý¾Ý¿âÖÐдÈë¶ÔÏó²âÊÔ³ÌÐò
* Copyright: Copyright 2009 ufgov, Inc.
* Compan ......
jdkÌṩÁËZipÏà¹ØµÄÀà·½±ãµÄʵÏÖѹËõºÍ½âѹËõ¡£Ê¹Ó÷½·¨ºÜ¼òµ¥¡£Ï±߷ֱðÊÇѹËõºÍ½âѹËõµÄ¼òµ¥ÊÂÀý
1¡¢Ñ¹ËõµÄ
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipE ......
5.ÈçºÎ´ÓJVMÖлñÈ¡ÐÅÏ¢À´½øÐе÷Õû
¡¡¡¡-verbose.gc¿ª¹Ø¿ÉÏÔʾgcµÄ²Ù×÷ÄÚÈÝ¡£´ò¿ªËü£¬¿ÉÒÔÏÔʾ×îæºÍ×î¿ÕÏÐÊÕ¼¯ÐÐΪ·¢ÉúµÄʱ¼ä¡¢ÊÕ¼¯Ç°ºóµÄÄÚ´æ´óС¡¢ÊÕ¼¯ÐèÒªµÄʱ¼äµÈ¡£´ò¿ª- xx:+ printgcdetails¿ª¹Ø£¬¿ÉÒÔÏêϸÁ˽âgcÖеı仯¡£´ò¿ª-XX: + PrintGCTimeStamps¿ª¹Ø£¬¿ÉÒÔÁ˽âÕâЩÀ¬»øÊÕ¼¯·¢ÉúµÄʱ¼ä£¬×ÔjvmÆô¶¯ÒÔºóÒÔ ......