Java--io input Stream output stream

　　the input stream output stream is a program as a reference point. I. What is I/O

I/O operations in Java mainly refer to using Java for input and output operations. All of Java's I/O mechanisms are input and output based on data streams that represent the flow sequences of character or byte data. Java's I/O stream provides a standard way to read and write data. Any object in Java that represents a data source provides a way to read and write its data in a data stream.

Java.io is the main software package for most data flow input/output classes. In addition, Java also provides support for block transport, which is used in the core library Java.nio as block IO.

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Java--io input Stream output stream