Closes the stream, flushing it first. Once the stream has been closed, further write() or flush() invocations will cause an IOException to be thrown. Closing a previously closed stream has no effect.

flush

open override fun flush()

Flushes the stream. If the stream has saved any characters from the various write() methods in a buffer, write them immediately to their intended destination. Then, if that destination is another character or byte stream, flush it. Thus one flush() invocation will flush all the buffers in a chain of Writers and OutputStreams.

fun print(s: String?)

Prints a string, mapping null to "null" (matches java.io.PrintWriter behavior).

println

fun println()

Terminates the current line by writing the line separator string. The line separator is System.lineSeparator and is not necessarily a single newline character ('\n').

fun println(x: String?)

Prints a String and then terminates the line. This method behaves as though it invokes .print and then .println.

write

open override fun write(str: String)

Writes a string. This method cannot be inherited from the Writer class because it must suppress I/O exceptions.

open override fun write(cbuf: CharArray, off: Int, len: Int)

Writes a portion of an array of characters.

open fun write(cbuf: CharArray)

Writes an array of characters.

open fun write(c: Int)

Writes a single character. The character to be written is contained in the 16 low-order bits of the given integer value; the 16 high-order bits are ignored.

open fun write(str: String, off: Int, len: Int)

Writes a portion of a string.