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java IO Rubicon

  input  stream  Out  stream
DataInputStream  DataIOutStream
BufferedInputStream  BufferedOutStream
LineNumberInputStream  PrintStream
PushbackInputStream  
ÒÔ×Ö½ÚΪµ¼
ÏòµÄ stream
  
    
  ----------(ÎÞ¶ÔÓ¦µÄ)  
BufferedReader  BufferedWrite
LineNumberReader  PrintWrite
ÒÔUnicode×Ö
·ûΪµ¼ÏòµÄ
stream
PushBackReader  
Table  3.0
3.1 ÒÔ×Ö½ÚΪµ¼ÏòµÄstream£º
3.1.1  Input  Stream
1) DataInputStream£º´ÓstreamÖжÁÈ¡»ù±¾ÀàÐÍ£¨int¡¢charµÈ£©Êý¾Ý¡£
2) BufferedInputStream£ºÊ¹Óûº³åÇø
3) LineNumberInputStream£º»á¼Ç¼input streamÄÚµÄÐÐÊý£¬È»ºó¿ÉÒÔµ÷ÓÃgetLineNumber()ºÍsetLineNumber(int)
4) PushbackInputStream£ººÜÉÙÓõ½£¬Ò»°ãÓÃÓÚ±àÒëÆ÷¿ª·¢
 
3.1.2 . Output  Stream
1) DataIOutStream£ºÍùstreamÖÐÊä³ö»ù±¾ÀàÐÍ£¨int¡¢charµÈ£©Êý¾Ý¡£
2) BufferedOutStream£ºÊ¹Óûº³åÇø
3) PrintStream£º²úÉú¸ñʽ»¯Êä³ö
 
3.2 ÒÔ×Ö·ûΪµ¼ÏòµÄStream
3.2.1  Input  Stream
1) ûÓÐÓëDataInputStream¶ÔÓ¦µÄÀà¡£³ý·ÇÔÚҪʹÓÃreadLine()ʱ¸ÄÓÃBufferedReader£¬·ñÔòʹÓÃ
DataInputStream
2) BufferedReader£ºÓëBufferedInputStream¶ÔÓ¦
3) LineNumberReader£ºÓëLineNumberInputStream¶ÔÓ¦
4) PushBackReader£ºÓëPushbackInputStream¶ÔÓ¦
 
3.2.2  Output    Stream
1) BufferedWrite£ºÓë¶ÔÓ¦
2) PrintWrite£ºÓë¶ÔÓ¦
3. 3 RandomAccessFile
1) ¿Éͨ¹ýRandomAccessFile¶ÔÏóÍê³É¶ÔÎļþµÄ¶Áд²Ù×÷
2) ÔÚ²úÉúÒ»¸ö¶ÔÏóʱ£¬¿ÉÖ¸Ã÷Òª´ò¿ªµÄÎļþµÄÐÔÖÊ£ºr£¬Ö»¶Á£»w£¬Ö»Ð´£»rw¿É¶Áд
3) ¿ÉÒÔÖ±½ÓÌøµ½ÎļþÖÐÖ¸¶¨µÄλÖà Java I/O
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import java.security.KeyPair;
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import java.util.concurrent.Semaphore;
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public abstract class Task {
public abstract void run();
private Semaphore s;
private boolean hasExisted = false;
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import java.util.Date;
import java.text.SimpleDateFormat; //ΪÁËÏÔʾʱ¼ä¶ø¼Ó
Date date = new Date(); //»ñµÃϵͳʱ¼ä.
String nowTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date);
//½«Ê±¼ä¸ñʽת»»³É·ûºÏTimestampÒªÇóµÄ¸ ......

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