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import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.util.zip.CRC32;
public static void main(String[] args){
try { //¶Ô
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.util.zip.CRC32;
public static void main(String[] args){
try { //¶ÔÎļþ½øÐÐcrcУÑé
long begin = System.currentTimeMillis();
FileInputStream in = new FileInputStream("code.py");//Ö¸¶¨Ä¿±êÎļþ
FileChannel channel = in.getChannel(); //´ÓÎļþÖлñȡһ¸öͨµÀ
CRC32 crc = new CRC32();
int length = (int)channel.size();
MappedByteBuffer buffer = channel.map(FileChannel.MapMode.READ_ONLY, 0, length); //ÓÃÖ»¶Áģʽ´Ó¸ÃͨµÀ»ñÈ¡×Ö½Ú»º³å£¬ÊµÏÖÎļþµ½ÄÚ´æµÄÓ³Éä
for(int i = 0;i<length;i++)
 
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Singleton.java£º
package com.xfimti.sigleton;
public class Singleton
{
/*µÚÒ»ÖÖ·½Ê½¡£*/
private static Singleton singleton = new Singleton();
/*µÚ¶þÖÖ·½Ê½¡£*/
private static Singleton mySingleton = null;
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