File
createNewFile
getName
getPath
getParent
exists
isFile
isDirectory
length
delete
mkdir
lists所有子文件和路径名返回string数组
listFiles 所有子文件和路径返回file数组
流的分类
输入流 inputstream/reader
输出流 outputstream/writer
字节流 inputstream outputstream
字符流 reader writer
Inputstream、outputstream
Fileinputstream read(byte []bufer)讲解
Fileoutputstream write的几种方法的讲解;flush close; Fileoutputstream(“”,true)允许追加
reader、writer
一个字符的读写
套接流(缓冲流)
BufferInputStream
BUfferOutPutStream
bufferReader
bufferWriter
转换流
InputStreamReader
outputStreamWriter
序列化
ObjectInputStream
ObjectOutputStream