java.io包.java

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(1->2)字节流－>字符流
InputStream->InputStreamReader
OutputStream->OutputStreamWriter

(1)字节流
InputStream->
FileInputStream->BufferedInputStream
OutputStream->
FileOutputStream->BufferedOutputStream

(2)字符流
FileReader->
InputStreamReader->BufferedReader
FileWriter->
OutputStreamWriter->BufferedWriter


1.  字节流－>字符流

	//字节流
	InputStream		
					FileInputStream//文件
					DataInputStream//数据
					PipedInputStream//管道
					BufferedInputStream//缓冲
					ByteArrayInputStream//内存
					FilterInputStream//过滤
					LineNumberInputStream//
					ObjectInputStream//对象
					PushbackInputStream//
					SequenceInputStream//拼接
					StringBufferInputStream//
	OutputStream	
					FileOutputStream
					DataOutputStream
					PipedOutputStream
					BufferedOutputStream
					ByteArrayOutputStream
					FilterOutputStream
					ObjectOutputStream
					PrintStream
					


	//字符流
	Reader			
					InputStreamReader//从文件流读入字符流
					CharArrayReader//从内存读入字符流
					BufferedReader//缓冲
					FileReader//从文件读入字符流
					LineNumberReader//
					PipedReader//从管道读入字符流
					PushbackReader//
					StringReader//

	Writer
					OutputStreamWriter//从文件流输出字符流
					CharArrayWriter//从内存输出字符流
					BufferedWriter//缓冲
					FileWriter//从文件输出字符流
					PipedWriter//从管道输出字符流
					StringWriter//
					PrintWriter


	//文件类
	File
	FileDescriptor
	RandomAccessFile
	SerializablePermission 
	StreamTokenizer 

2.  位置不同

	//内存				
					ByteArrayInputStream
					ByteArrayOutputStream
	//管道
					PipedInputStream
					PipedOutputStream
					PipedReader
					PipedWriter
	//文件
					FileInputStream
					FileOutputStream
	
3.	进程（过滤，格式化，效果）

	//缓冲	
					BufferedInputStream
					BufferedOutputStream
					BufferedReader
					BufferedWriter
	//过滤
					FilterInputStream
					FilterOutputStream
	//数据
					DataInputStream
					DataOutputStream