java的InputStream的范例
InputStream的浸染是符号那些从差异发源地发生输入的类。这些发源地包罗(每个都有一个相关的InputStream子类):
(1) 字节数组
(2) String工具
(3) 文件
(4) “管道”,它的事情道理与现实糊口中的管道雷同:将一些对象置入一端,它们在另一端出来。 (5) 一系列其他流,以便我们将其统一收集到单唯一个流内。
(6) 其他发源地,如Internet毗连等(将在本书后头的部门报告)。
除此以外,FilterInputStream也属于InputStream的一种范例,用它可为“粉碎器”类提供一个基本类,以便将属性可能有用的接口同输入流毗连到一起。这将在今后接头。
Class |
Function |
Constructor Arguments |
---|---|---|
How to use it |
||
ByteArray-InputStream |
Allows a buffer in memory to be used as an InputStream. |
The buffer from which to extract the bytes. |
As a source of data. Connect it to a FilterInputStream object to provide a useful interface. |
||
StringBuffer-InputStream |
Converts a String into an InputStream. |
A String. The underlying implementation actually uses a StringBuffer. |
As a source of data. Connect it to a FilterInputStream object to provide a useful interface. |
||
File-InputStream |
For reading information from a file. |
A String representing the file name, or a File or FileDescriptor object. |
As a source of data. Connect it to a FilterInputStream object to provide a useful interface. |
类 成果 构建器参数/如何利用
ByteArrayInputStream 答允内存中的一个缓冲区作为InputStream利用 从中提取字节的缓冲区/作为一个数据源利用。通过将其同一个FilterInputStream工具毗连,可提供一个有用的接口
StringBufferInputStream 将一个String转换成InputStream 一个String(字串)。基本的实施方案实际回收一个StringBuffer(字串缓冲)/作为一个数据源利用。通过将其同一个FilterInputStream工具毗连,可提供一个有用的接口
FileInputStream 用于从文件读取信息 代表文件名的一个String,可能一个File或FileDescriptor工具/作为一个数据源利用。通过将其同一个FilterInputStream工具毗连,可提供一个有用的接口
Piped-InputStream |
Produces the data that’s being written to the associated PipedOutput-Stream. Implements the “piping” concept. |
PipedOutputStream |
As a source of data in multithreading. Connect it to a FilterInputStream object to provide a useful interface. |
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Sequence-InputStream |
Coverts two or more InputStream objects into a single InputStream. |
Two InputStream objects or an Enumeration for a container of InputStream objects. |
#p#分页标题#e#
As a source of data. Connect it to a FilterInputStream object to provide a useful interface. |
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Filter-InputStream |
Abstract class which is an interface for decorators that provide useful functionality to the other InputStream classes. See Table 10-3. |
See Table 10-3. |
See Table 10-3. |
PipedInputString 发生为相关的PipedOutputStream写的数据。实现了“管道化”的观念 PipedOutputStream/作为一个数据源利用。通过将其同一个FilterInputStream工具毗连,可提供一个有用的接口
SequenceInputStream 将两个或更多的InputStream工具转换成单个InputStream利用 两个InputStream工具可能一个Enumeration,用于InputStream工具的一个容器/作为一个数据源利用。通过将其同一个FilterInputStream工具毗连,可提供一个有用的接口
FilterInputStream 对作为粉碎器接口利用的类举办抽象;谁人粉碎器为其他InputStream类提供了有用的成果。拜见表10.3