Universal output stream of [Java IO stream] print stream printwriter

Time:2021-4-30

Printwriter universal output stream

summary:

This class implements all the print methods in printstream.

characteristic:

1. Only write data, not read data

2. Any type of data can be operated

3. If auto refresh is started, it can be automatically refreshed, and this operation can only be completed by calling one of the methods of println, printf or format.

//Auto refresh is not started

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