Class NullOutputStream

  • All Implemented Interfaces:
    java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

    public class NullOutputStream
    extends java.io.OutputStream
    A "dev/null" output stream - an output stream implementation that discards all the data written to it. This implementation is not thread-safe. Note that once a null output stream instance is closed, any subsequent attempts to write the data to the closed stream result in an IOException being thrown.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      private boolean isClosed  
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      private void checkClosed()  
      void close()  
      void flush()  
      void write​(byte[] b, int off, int len)  
      void write​(int b)  
      • Methods inherited from class java.io.OutputStream

        nullOutputStream, write
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • isClosed

        private boolean isClosed
    • Constructor Detail

      • NullOutputStream

        public NullOutputStream()
    • Method Detail

      • write

        public void write​(int b)
                   throws java.io.IOException
        Specified by:
        write in class java.io.OutputStream
        Throws:
        java.io.IOException
      • write

        public void write​(byte[] b,
                          int off,
                          int len)
                   throws java.io.IOException
        Overrides:
        write in class java.io.OutputStream
        Throws:
        java.io.IOException
      • flush

        public void flush()
                   throws java.io.IOException
        Specified by:
        flush in interface java.io.Flushable
        Overrides:
        flush in class java.io.OutputStream
        Throws:
        java.io.IOException
      • checkClosed

        private void checkClosed()
                          throws java.io.IOException
        Throws:
        java.io.IOException
      • close

        public void close()
                   throws java.io.IOException
        Specified by:
        close in interface java.lang.AutoCloseable
        Specified by:
        close in interface java.io.Closeable
        Overrides:
        close in class java.io.OutputStream
        Throws:
        java.io.IOException