java.io · java.base · since Java 1.1

PrintWriter

declaration

public class PrintWriter extends Writer

Convenient formatted text output: print/println/printf. Swallows I/O errors by design (checkError() to ask) — fine for console, deliberate choice elsewhere.

Key methods

`void println(Object x)`	Value + platform line separator.
`PrintWriter printf(String format, Object... args)`	Formatted output.
`boolean checkError()`	The only way to learn of write failures.