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package com.shxy.code;
import java.io.BufferedOutputStream;  
import java.io.BufferedReader;  
import java.io.File;  
import java.io.FileInputStream;  
 
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.io.InputStream;  
import java.io.InputStreamReader;  
import java.util.zip.Adler32;  
import java.util.zip.CheckedOutputStream;  
 
import org.apache.tools.zip.ZipEntry;  
import org.apache.tools.zip.ZipOutputStream;  
 
/** 
 * ÎļþÏà¹Ø²Ù×÷£¨£© 
 * @author gaoyusi 
 * 
 */ 
public class FileHelper {  
 
    /** 
     * ½«ÎļþÓÉÖ¸¶¨Â·¾¶¿½±´µ½Ö¸¶¨Â·¾¶ 
     * Èç¹ûÖ¸¶¨Â·¾¶Îļþ²»´æÔÚ£¬Ôò×Ô¶¯´´½¨¸ÃÎļþ 
     * @param src ÎļþµÄԴ·¾¶ 
     * @param dis Îļþ¸´ÖƵÄÄ¿µÄ·¾¶ 
     */ 
    public void copyFile(String src, String dis) throws IOException{  
        File srcFile=new File(src);  
        File disFile=new File(dis);  
        //ÕÒ²»µ½Ô´Îļþ  
        if(!srcFile.exists()){  
            throw new IOException("ÕÒ²»µ½Ô´Îļþ£¡");  
        }  
        try{  
            //create distinct file  
            createNewFile(disFile);  
   


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Java ÖеÄÄÚ²¿¾²Ì¬Àà

Java ÖÐÄÚ²¿¶¯Ì¬Àà(ûÓÐstatic)¹Ø¼ü×ÖºÍÄÚ²¿¾²Ì¬ÀàµÄ¾ÍÔÚÓÚÄÚ²¿¶¯Ì¬À಻Äܶ¨Ò徲̬±äÁ¿»òÊǾ²Ì¬·½·¨,Èç¹ûÒªÔÚÄÚ²¿ÀàÖÐʹÓþ²Ì¬³ÉÔ±,±ØÐ뽫ÀàÉùÃ÷Ϊ¾²Ì¬Àà.
ÄÚ²¿ÀàÖеľ²Ì¬·½·¨¿ÉÒÔ·ÃÎÊÍⲿÀàµÄ¾²Ì¬·½·¨ºÍ±¾ÀàÖеľ²Ì¬·½·¨»ò³ÉÔ±, ·Ç¾²Ì¬·½·¨¿ÉÒÔ·ÃÎÊÆäËûËùÓеķ½·¨»ò³ÉÔ± ......

Effective Java ѧϰ±Ê¼Ç (6)

¼°Ê±Ïû³ý²»Ê¹ÓõĶÔÏóµÄÒýÓÃ, ÀíÂÛÉÏ, ´øÓÐÄÚ´æ¹ÜÀíµÄÓïÑÔÊDz»´æÔÚÄÚ´æй©µÄ, µ«ÊÇÈç¹û¶Ô¶ÔÏóµÄ²Ù×÷²»µ±,Ò²ÊÇ¿ÉÄÜ»áÔì³ÉÄÚ´æй©.
ÈçÓÐÒ»¸östack, Æäpopº¯ÊýÈçÏÂ.
public Object pop()
{
               if( Element.length() == 0) return nu ......

Java·ºÐÍ·½·¨

package PairTestMyCode.copy;
import java.util.*;
public class PairTest2
{
public static void main(String[] args)
{
GregorianCalendar[] birthdays =
{
new GregorianCalendar(1906, Calendar.DECEMBER, 9), // G. Hopper
new GregorianCalendar(1815, Cal ......

Effective Java ѧϰ±Ê¼Ç(8)

µ±ÖØÔØequals·½·¨Ê±,×ñÑ­¹ßÀý.
equals²»ÊÇÿ¸öÀ඼±ØÐëÖØÔØ,µ±ÒÔϼ¸¸öÌõ¼þÂú×ã,¿ÉÒÔ²»ÖØÔØequals.
1. ÀàµÄʵÀýÖ»ÓÐͬһ¸ö²Å±»ÅÐΪÏàµÈ. ÈçThreadÀà.
2. ²»ÓùØÐÄÁ½¸ö¶ÔÏóÊÇ·ñÂß¼­ÏàµÈµÄʱºò,»òÊÇ˵±È½Ï¶ÔÏóûÓÐÒâÒå.
3.¸¸ÀàÒѾ­ÖØÔØÁËequals,¶øÇÒ¸¸ÀàµÄequalsÒ²ÊÊÓÃÓÚ×ÓÀà,×ÓÀà¾Í²»ÓÃÖØÔØequals.
4.ÕâÊÇÒ»¸ö˽ÓÐÀà»òÊ ......

weka1:ÔÚeclipseÏÂʹÓÃjavaµ÷ÓÃweka

ÔÚjavaÏîÄ¿Öе¼Èëweka.jarµÄ°ü,È»ºó°ÑÏÂÃæ´úÂëcopyµ½mainÀïÃæ,
ÓÃeclipseµÄ»°×Ô¶¯import°É.
×¢ÒâÒ»ÏÂÄǸöÎļþµÄ·¾¶ÊÇ·ñÕýÈ·.
import
java.io.File;
import
weka.classifiers.Classifier;
import
weka.classifiers.trees.J48;
import
weka.core.Instances;
import
weka.core.converters.ArffLoader;

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