org.apache.commons.io.output

Class NullWriter

  • All Implemented Interfaces:
    Closeable, Flushable, Appendable, AutoCloseable

    public class NullWriter
    extends Writer
    Writes all data to the famous /dev/null.

    This Writer has no destination (file/socket etc.) and all characters written to it are ignored and lost.

    • Field Detail

      • NULL_WRITER

        public static final NullWriter NULL_WRITER
        A singleton.
    • Constructor Detail

      • NullWriter

        public NullWriter()
        Constructs a new NullWriter.
    • Method Detail

      • append

        public Writer append(char c)
        Does nothing - output to /dev/null.
        Specified by:
        append in interface  Appendable
        Overrides:
        append in class  Writer
        Parameters:
        c - The character to write
        Returns:
        this writer
        Since:
        2.0
      • append

        public Writer append(CharSequence csq,
                             int start,
                             int end)
        Does nothing - output to /dev/null.
        Specified by:
        append in interface  Appendable
        Overrides:
        append in class  Writer
        Parameters:
        csq - The character sequence to write
        start - The index of the first character to write
        end - The index of the first character to write (exclusive)
        Returns:
        this writer
        Since:
        2.0
      • append

        public Writer append(CharSequence csq)
        Does nothing - output to /dev/null.
        Specified by:
        append in interface  Appendable
        Overrides:
        append in class  Writer
        Parameters:
        csq - The character sequence to write
        Returns:
        this writer
        Since:
        2.0
      • write

        public void write(int idx)
        Does nothing - output to /dev/null.
        Overrides:
        write in class  Writer
        Parameters:
        idx - The character to write
      • write

        public void write(char[] chr)
        Does nothing - output to /dev/null.
        Overrides:
        write in class  Writer
        Parameters:
        chr - The characters to write
      • write

        public void write(char[] chr,
                          int st,
                          int end)
        Does nothing - output to /dev/null.
        Specified by:
        write in class  Writer
        Parameters:
        chr - The characters to write
        st - The start offset
        end - The number of characters to write
      • write

        public void write(String str)
        Does nothing - output to /dev/null.
        Overrides:
        write in class  Writer
        Parameters:
        str - The string to write
      • write

        public void write(String str,
                          int st,
                          int end)
        Does nothing - output to /dev/null.
        Overrides:
        write in class  Writer
        Parameters:
        str - The string to write
        st - The start offset
        end - The number of characters to write

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