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Java Standard Edition (SE)

ImageOutputStreamImpl


javax.imageio.stream

Class ImageOutputStreamImpl

    • Constructor Detail

      • ImageOutputStreamImpl

        public ImageOutputStreamImpl()
        Constructs an ImageOutputStreamImpl.
    • Method Detail

      • write

        public abstract void write(int b)
                            throws IOException
        Description copied from interface: ImageOutputStream
        Writes a single byte to the stream at the current position. The 24 high-order bits of b are ignored.

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write. Implementers can use the flushBits method of ImageOutputStreamImpl to guarantee this.

        Specified by:
        write in interface DataOutput
        Specified by:
        write in interface ImageOutputStream
        Parameters:
        b - an int whose lower 8 bits are to be written.
        Throws:
        IOException - if an I/O error occurs.
      • write

        public void write(byte[] b)
                   throws IOException
        Description copied from interface: ImageOutputStream
        Writes a sequence of bytes to the stream at the current position. If b.length is 0, nothing is written. The byte b[0] is written first, then the byte b[1], and so on.

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        write in interface DataOutput
        Specified by:
        write in interface ImageOutputStream
        Parameters:
        b - an array of bytes to be written.
        Throws:
        IOException - if an I/O error occurs.
      • write

        public abstract void write(byte[] b,
                                   int off,
                                   int len)
                            throws IOException
        Description copied from interface: ImageOutputStream
        Writes a sequence of bytes to the stream at the current position. If len is 0, nothing is written. The byte b[off] is written first, then the byte b[off + 1], and so on.

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write. Implementers can use the flushBits method of ImageOutputStreamImpl to guarantee this.

        Specified by:
        write in interface DataOutput
        Specified by:
        write in interface ImageOutputStream
        Parameters:
        b - an array of bytes to be written.
        off - the start offset in the data.
        len - the number of bytes to write.
        Throws:
        IOException - if an I/O error occurs.
      • writeBoolean

        public void writeBoolean(boolean v)
                          throws IOException
        Description copied from interface: ImageOutputStream
        Writes a boolean value to the stream. If v is true, the value (byte)1 is written; if v is false, the value (byte)0 is written.

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        writeBoolean in interface DataOutput
        Specified by:
        writeBoolean in interface ImageOutputStream
        Parameters:
        v - the boolean to be written.
        Throws:
        IOException - if an I/O error occurs.
      • writeByte

        public void writeByte(int v)
                       throws IOException
        Description copied from interface: ImageOutputStream
        Writes the 8 low-order bits of v to the stream. The 24 high-order bits of v are ignored. (This means that writeByte does exactly the same thing as write for an integer argument.)

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        writeByte in interface DataOutput
        Specified by:
        writeByte in interface ImageOutputStream
        Parameters:
        v - an int containing the byte value to be written.
        Throws:
        IOException - if an I/O error occurs.
      • writeShort

        public void writeShort(int v)
                        throws IOException
        Description copied from interface: ImageOutputStream
        Writes the 16 low-order bits of v to the stream. The 16 high-order bits of v are ignored. If the stream uses network byte order, the bytes written, in order, will be:
         (byte)((v >> 8) & 0xff)
         (byte)(v & 0xff)
         
        Otherwise, the bytes written will be:
         (byte)(v & 0xff)
         (byte)((v >> 8) & 0xff)
         

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        writeShort in interface DataOutput
        Specified by:
        writeShort in interface ImageOutputStream
        Parameters:
        v - an int containing the short value to be written.
        Throws:
        IOException - if an I/O error occurs.
      • writeInt

        public void writeInt(int v)
                      throws IOException
        Description copied from interface: ImageOutputStream
        Writes the 32 bits of v to the stream. If the stream uses network byte order, the bytes written, in order, will be:
         (byte)((v >> 24) & 0xff)
         (byte)((v >> 16) & 0xff)
         (byte)((v >> 8) & 0xff)
         (byte)(v & 0xff)
         
        Otheriwse, the bytes written will be:
         (byte)(v & 0xff)
         (byte)((v >> 8) & 0xff)
         (byte)((v >> 16) & 0xff)
         (byte)((v >> 24) & 0xff)
         

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        writeInt in interface DataOutput
        Specified by:
        writeInt in interface ImageOutputStream
        Parameters:
        v - an int containing the value to be written.
        Throws:
        IOException - if an I/O error occurs.
      • writeLong

        public void writeLong(long v)
                       throws IOException
        Description copied from interface: ImageOutputStream
        Writes the 64 bits of v to the stream. If the stream uses network byte order, the bytes written, in order, will be:
         (byte)((v >> 56) & 0xff)
         (byte)((v >> 48) & 0xff)
         (byte)((v >> 40) & 0xff)
         (byte)((v >> 32) & 0xff)
         (byte)((v >> 24) & 0xff)
         (byte)((v >> 16) & 0xff)
         (byte)((v >> 8) & 0xff)
         (byte)(v & 0xff)
         
        Otherwise, the bytes written will be:
         (byte)(v & 0xff)
         (byte)((v >> 8) & 0xff)
         (byte)((v >> 16) & 0xff)
         (byte)((v >> 24) & 0xff)
         (byte)((v >> 32) & 0xff)
         (byte)((v >> 40) & 0xff)
         (byte)((v >> 48) & 0xff)
         (byte)((v >> 56) & 0xff)
         

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        writeLong in interface DataOutput
        Specified by:
        writeLong in interface ImageOutputStream
        Parameters:
        v - a long containing the value to be written.
        Throws:
        IOException - if an I/O error occurs.
      • writeFloat

        public void writeFloat(float v)
                        throws IOException
        Description copied from interface: ImageOutputStream
        Writes a float value, which is comprised of four bytes, to the output stream. It does this as if it first converts this float value to an int in exactly the manner of the Float.floatToIntBits method and then writes the int value in exactly the manner of the writeInt method.

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        writeFloat in interface DataOutput
        Specified by:
        writeFloat in interface ImageOutputStream
        Parameters:
        v - a float containing the value to be written.
        Throws:
        IOException - if an I/O error occurs.
      • writeDouble

        public void writeDouble(double v)
                         throws IOException
        Description copied from interface: ImageOutputStream
        Writes a double value, which is comprised of four bytes, to the output stream. It does this as if it first converts this double value to an long in exactly the manner of the Double.doubleToLongBits method and then writes the long value in exactly the manner of the writeLong method.

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        writeDouble in interface DataOutput
        Specified by:
        writeDouble in interface ImageOutputStream
        Parameters:
        v - a double containing the value to be written.
        Throws:
        IOException - if an I/O error occurs.
      • writeBytes

        public void writeBytes(String s)
                        throws IOException
        Description copied from interface: ImageOutputStream
        Writes a string to the output stream. For every character in the string s, taken in order, one byte is written to the output stream. If s is null, a NullPointerException is thrown.

        If s.length is zero, then no bytes are written. Otherwise, the character s[0] is written first, then s[1], and so on; the last character written is s[s.length-1]. For each character, one byte is written, the low-order byte, in exactly the manner of the writeByte method. The high-order eight bits of each character in the string are ignored.

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        writeBytes in interface DataOutput
        Specified by:
        writeBytes in interface ImageOutputStream
        Parameters:
        s - a String containing the value to be written.
        Throws:
        IOException - if an I/O error occurs.
      • writeChars

        public void writeChars(String s)
                        throws IOException
        Description copied from interface: ImageOutputStream
        Writes a string to the output stream. For every character in the string s, taken in order, two bytes are written to the output stream, ordered according to the current byte order setting. If network byte order is being used, the high-order byte is written first; the order is reversed otherwise. If s is null, a NullPointerException is thrown.

        If s.length is zero, then no bytes are written. Otherwise, the character s[0] is written first, then s[1], and so on; the last character written is s[s.length-1].

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        writeChars in interface DataOutput
        Specified by:
        writeChars in interface ImageOutputStream
        Parameters:
        s - a String containing the value to be written.
        Throws:
        IOException - if an I/O error occurs.
      • writeUTF

        public void writeUTF(String s)
                      throws IOException
        Description copied from interface: ImageOutputStream
        Writes two bytes of length information to the output stream in network byte order, followed by the modified UTF-8 representation of every character in the string s. If s is null, a NullPointerException is thrown. Each character in the string s is converted to a group of one, two, or three bytes, depending on the value of the character.

        If a character c is in the range \u0001 through \u007f, it is represented by one byte:

         (byte)c
         

        If a character c is \u0000 or is in the range \u0080 through \u07ff, then it is represented by two bytes, to be written in the order shown:

        
         (byte)(0xc0 | (0x1f & (c >> 6)))
         (byte)(0x80 | (0x3f & c))
         

        If a character c is in the range \u0800 through uffff, then it is represented by three bytes, to be written in the order shown:

        
         (byte)(0xe0 | (0x0f & (c >> 12)))
         (byte)(0x80 | (0x3f & (c >> 6)))
         (byte)(0x80 | (0x3f & c))
         

        First, the total number of bytes needed to represent all the characters of s is calculated. If this number is larger than 65535, then a UTFDataFormatException is thrown. Otherwise, this length is written to the output stream in exactly the manner of the writeShort method; after this, the one-, two-, or three-byte representation of each character in the string s is written.

        The current byte order setting is ignored.

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Note: This method should not be used in the implementation of image formats that use standard UTF-8, because the modified UTF-8 used here is incompatible with standard UTF-8.

        Specified by:
        writeUTF in interface DataOutput
        Specified by:
        writeUTF in interface ImageOutputStream
        Parameters:
        s - a String containing the value to be written.
        Throws:
        UTFDataFormatException - if the modified UTF-8 representation of s requires more than 65536 bytes.
        IOException - if an I/O error occurs.
      • writeShorts

        public void writeShorts(short[] s,
                                int off,
                                int len)
                         throws IOException
        Description copied from interface: ImageOutputStream
        Writes a sequence of shorts to the stream at the current position. If len is 0, nothing is written. The short s[off] is written first, then the short s[off + 1], and so on. The byte order of the stream is used to determine the order in which the individual bytes are written.

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        writeShorts in interface ImageOutputStream
        Parameters:
        s - an array of shorts to be written.
        off - the start offset in the data.
        len - the number of shorts to write.
        Throws:
        IOException - if an I/O error occurs.
      • writeChars

        public void writeChars(char[] c,
                               int off,
                               int len)
                        throws IOException
        Description copied from interface: ImageOutputStream
        Writes a sequence of chars to the stream at the current position. If len is 0, nothing is written. The char c[off] is written first, then the char c[off + 1], and so on. The byte order of the stream is used to determine the order in which the individual bytes are written.

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        writeChars in interface ImageOutputStream
        Parameters:
        c - an array of chars to be written.
        off - the start offset in the data.
        len - the number of chars to write.
        Throws:
        IOException - if an I/O error occurs.
      • writeInts

        public void writeInts(int[] i,
                              int off,
                              int len)
                       throws IOException
        Description copied from interface: ImageOutputStream
        Writes a sequence of ints to the stream at the current position. If len is 0, nothing is written. The int i[off] is written first, then the int i[off + 1], and so on. The byte order of the stream is used to determine the order in which the individual bytes are written.

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        writeInts in interface ImageOutputStream
        Parameters:
        i - an array of ints to be written.
        off - the start offset in the data.
        len - the number of ints to write.
        Throws:
        IOException - if an I/O error occurs.
      • writeLongs

        public void writeLongs(long[] l,
                               int off,
                               int len)
                        throws IOException
        Description copied from interface: ImageOutputStream
        Writes a sequence of longs to the stream at the current position. If len is 0, nothing is written. The long l[off] is written first, then the long l[off + 1], and so on. The byte order of the stream is used to determine the order in which the individual bytes are written.

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        writeLongs in interface ImageOutputStream
        Parameters:
        l - an array of longs to be written.
        off - the start offset in the data.
        len - the number of longs to write.
        Throws:
        IOException - if an I/O error occurs.
      • writeFloats

        public void writeFloats(float[] f,
                                int off,
                                int len)
                         throws IOException
        Description copied from interface: ImageOutputStream
        Writes a sequence of floats to the stream at the current position. If len is 0, nothing is written. The float f[off] is written first, then the float f[off + 1], and so on. The byte order of the stream is used to determine the order in which the individual bytes are written.

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        writeFloats in interface ImageOutputStream
        Parameters:
        f - an array of floats to be written.
        off - the start offset in the data.
        len - the number of floats to write.
        Throws:
        IOException - if an I/O error occurs.
      • writeDoubles

        public void writeDoubles(double[] d,
                                 int off,
                                 int len)
                          throws IOException
        Description copied from interface: ImageOutputStream
        Writes a sequence of doubles to the stream at the current position. If len is 0, nothing is written. The double d[off] is written first, then the double d[off + 1], and so on. The byte order of the stream is used to determine the order in which the individual bytes are written.

        If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write.

        Specified by:
        writeDoubles in interface ImageOutputStream
        Parameters:
        d - an array of doubless to be written.
        off - the start offset in the data.
        len - the number of doubles to write.
        Throws:
        IOException - if an I/O error occurs.
      • writeBit

        public void writeBit(int bit)
                      throws IOException
        Description copied from interface: ImageOutputStream
        Writes a single bit, given by the least significant bit of the argument, to the stream at the current bit offset within the current byte position. The upper 31 bits of the argument are ignored. The given bit replaces the previous bit at that position. The bit offset is advanced by one and reduced modulo 8.

        If any bits of a particular byte have never been set at the time the byte is flushed to the destination, those bits will be set to 0 automatically.

        Specified by:
        writeBit in interface ImageOutputStream
        Parameters:
        bit - an int whose least significant bit is to be written to the stream.
        Throws:
        IOException - if an I/O error occurs.
      • writeBits

        public void writeBits(long bits,
                              int numBits)
                       throws IOException
        Description copied from interface: ImageOutputStream
        Writes a sequence of bits, given by the numBits least significant bits of the bits argument in left-to-right order, to the stream at the current bit offset within the current byte position. The upper 64 - numBits bits of the argument are ignored. The bit offset is advanced by numBits and reduced modulo 8. Note that a bit offset of 0 always indicates the most-significant bit of the byte, and bytes of bits are written out in sequence as they are encountered. Thus bit writes are always effectively in network byte order. The actual stream byte order setting is ignored.

        Bit data may be accumulated in memory indefinitely, until flushBefore is called. At that time, all bit data prior to the flushed position will be written.

        If any bits of a particular byte have never been set at the time the byte is flushed to the destination, those bits will be set to 0 automatically.

        Specified by:
        writeBits in interface ImageOutputStream
        Parameters:
        bits - a long containing the bits to be written, starting with the bit in position numBits - 1 down to the least significant bit.
        numBits - an int between 0 and 64, inclusive.
        Throws:
        IOException - if an I/O error occurs.
      • flushBits

        protected final void flushBits()
                                throws IOException
        If the bit offset is non-zero, forces the remaining bits in the current byte to 0 and advances the stream position by one. This method should be called by subclasses at the beginning of the write(int) and write(byte[], int, int) methods.
        Throws:
        IOException - if an I/O error occurs.


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