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Java´´½¨¡¢ÖØÃüÃû¡¢É¾³ýÎļþºÍÎļþ¼Ð

package my.file;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
public class TravelAllFile {
public static void main(String[] args) {
String path = "E:/Îļþ¼Ð";
File f = new File(path);
if (f.isDirectory()) {
new TravelAllFile().getFileName(f);
}

delFolder("E:/Îļþ¼Ð");
System.out.println("deleted");
}

// µÝ¹é²éÕÒº¯Êý£¬²ÎÊýΪfile¶ÔÏó
public void getFileName(File f) {
// File Êý×é
File[] files = f.listFiles();
for (int i = 0; i < files.length; i++) {
// µÝ¹é³ö×ÓĿ¼
if (files[i].isDirectory()) {
System.out.println("×ÓĿ¼ÊÇ£º" + files[i].getName());
getFileName(files[i]);
// µÝ¹é³ö×ÓÎļþ
} else {
System.out.println(files[i].getName());
}
}
}
//ÖØÃüÃû
public void rename(){
File fl=new File("E:\\Îļþ¼Ð"); // ÕâÀïдÉÏ·¢Ìæ»»µÄÎļþ¼Ð·¾¶,×¢ÒâʹÓÃ˫б¸Ü
String[] files=fl.list();
File f=null;
String filename="";
for(String file:files)
{
f=new File(fl,file);// ×¢Òâ,ÕâÀïÒ»¶¨ÒªÐ´³ÉFile(fl,file)Èç¹ûд³ÉFile(file)ÊÇÐв»Í¨µÄ,Ò»¶¨ÒªÈ«Â·¾¶
filename=f.getName();
// System.out.println(filename);
f.renameTo(new File(fl.getAbsolutePath()+"\\"+filename.replace("ÒªÌæ»»µôµÄÄÚÈÝ", "Ìæ»»³ÉµÄÄÚÈÝ")));// ÕâÀï¿ÉÒÔ·´¸´Ê¹ÓÃreplaceÌæ»»,µ±È»Ò²¿ÉÒÔʹÓÃÕýÔò±í´ïʽÀ´Ìæ»»ÁË

}
}

//ɾ³ýÎļþ¼Ð
//param folderPath Îļþ¼ÐÍêÕû¾ø¶Ô·¾¶
public static void delFolder(String folderPath) {
try {
delAllFile(folderPath); //ɾ³ýÍêÀïÃæËùÓÐÄÚÈÝ
String filePath = folderPath;
filePath = filePath.toString();
java.io.File myFilePath = new java.io.File(filePath);
myFilePath.delete(); //ɾ³ý¿ÕÎļþ¼Ð
} catch (Exception e) {
e.printStackTrace();
}
}
//ɾ³ýÖ¸¶¨Îļþ¼ÐÏÂËùÓÐÎļþ
//param path Îļþ¼ÐÍêÕû¾ø¶Ô·¾¶
public static boolean delAllFile(String path) {
boolean flag = false;
File file = new File(path);
if (!file.exists()) {
return flag;


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JAVA:ÓöàÏß³ÌʵÏÖʱ¼äµÄ¶¯Ì¬ÏÔʾ

import java.awt.*;
import javax.swing.*;
import java.util.Date;
import java.awt.*;
class Time extends JFrame implements Runnable{//ʵÏÖ½Ó¿Ú
Thread clockThread;
   JLabel jLabel=new JLabel();
   public Time()
   {
   Container con=this.getContentPane() ......

Java֮staticѧϰ

¶ÔÓÚѧϰstaticÎÒÃÇÏÈÀ´¿´Á½¸öÀý×Ó£º
//Example 1 Tst.java£¬no main() method
package com.blogchina.qb2049;
public class Tst
{
static { System.out.println("111111"); }
}
ÔËÐнá¹ûΪ: 111111
Exception in thread "main" java.lang.NoSuchMethodError: main
ͬÑùµÄµÀÀí¿´µÚ¶þ ......

JAVA List to Array,Array to List

 1.Listת»»³ÉΪÊý×é¡££¨ÕâÀïµÄListÊÇʵÌåÊÇArrayList)
µ÷ÓÃArrayListµÄtoArray·½·¨¡£
Àý£ºString[] arr = (String[])list.toArray(new String[size]);
2.Êý×éת»»³ÉΪList¡£
µ÷ÓÃArraysµÄasList·½·¨¡£
Àý£ºList stooges = Arrays.asList("Larry", "Moe", "Curly"); ......

javaÖйØÓÚʱ¼äÈÕÆÚ²Ù×÷µÄ³£Óú¯Êý

1.¼ÆËãijһÔ·ݵÄ×î´óÌìÊý
Calendar time=Calendar.getInstance();
time.clear();
time.set(Calendar.YEAR,year);
time.set(Calendar.MONTH,i-1);//×¢Òâ,Calendar¶ÔÏóĬÈÏÒ»ÔÂΪ0            
int day=time.getActualMaximum(Calendar.DAY_OF_MONTH);//±¾Ô·ݵÄÌìÊý ......

¹ØÓÚjavaÖбäÁ¿µÄ³õʼ»¯µÄÎÊÌâ

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