Package com.google.common.io

Interface ByteArrayDataOutput

    • Method Summary

      All Methods Instance Methods Abstract Methods Deprecated Methods 
      Modifier and Type Method Description
      byte[] toByteArray()
      Returns the contents that have been written to this instance, as a byte array.
      void write(byte[] b)
      Writes to the output stream all the bytes in array b.
      void write(byte[] b, int off, int len)
      Writes len bytes from array b, in order, to the output stream.
      void write(int b)
      Writes to the output stream the eight low-order bits of the argument b.
      void writeBoolean(boolean v)
      Writes a boolean value to this output stream.
      void writeByte(int v)
      Writes to the output stream the eight low- order bits of the argument v.
      void writeBytes(String s)
      Deprecated.
      This method is dangerous as it discards the high byte of every character.
      void writeChar(int v)
      Writes a char value, which is comprised of two bytes, to the output stream.
      void writeChars(String s)
      Writes every character in the string s, to the output stream, in order, two bytes per character.
      void writeDouble(double v)
      Writes a double value, which is comprised of eight bytes, to the output stream.
      void writeFloat(float v)
      Writes a float value, which is comprised of four bytes, to the output stream.
      void writeInt(int v)
      Writes an int value, which is comprised of four bytes, to the output stream.
      void writeLong(long v)
      Writes a long value, which is comprised of eight bytes, to the output stream.
      void writeShort(int v)
      Writes two bytes to the output stream to represent the value of the argument.
      void writeUTF(String s)
      Writes two bytes of length information to the output stream, followed by the modified UTF-8 representation of every character in the string s.

    • Method Detail

      • write

        void write(int b)
        Description copied from interface: java.io.DataOutput
        Writes to the output stream the eight low-order bits of the argument b. The 24 high-order bits of b are ignored.
        Specified by:
        write in interface DataOutput
        Parameters:
        b - the byte to be written.

      • write

        void write(byte[] b)
        Description copied from interface: java.io.DataOutput
        Writes to the output stream all the bytes in array b. If b is null, a NullPointerException is thrown. If b.length is zero, then no bytes are written. Otherwise, the byte b[0] is written first, then b[1], and so on; the last byte written is b[b.length-1].
        Specified by:
        write in interface DataOutput
        Parameters:
        b - the data.

      • write

        void write(byte[] b,
           int off,
           int len)
        Description copied from interface: java.io.DataOutput
        Writes len bytes from array b, in order, to the output stream. If b is null, a NullPointerException is thrown. If off is negative, or len is negative, or off+len is greater than the length of the array b, then an IndexOutOfBoundsException is thrown. If len is zero, then no bytes are written. Otherwise, the byte b[off] is written first, then b[off+1], and so on; the last byte written is b[off+len-1].
        Specified by:
        write in interface DataOutput
        Parameters:
        b - the data.
        off - the start offset in the data.
        len - the number of bytes to write.

      • writeBoolean

        void writeBoolean(boolean v)
        Description copied from interface: java.io.DataOutput
        Writes a boolean value to this output stream. If the argument v is true, the value (byte)1 is written; if v is false, the value (byte)0 is written. The byte written by this method may be read by the readBoolean method of interface DataInput, which will then return a boolean equal to v.
        Specified by:
        writeBoolean in interface DataOutput
        Parameters:
        v - the boolean to be written.

      • writeByte

        void writeByte(int v)
        Description copied from interface: java.io.DataOutput
        Writes to the output stream the eight low- order bits of the argument v. The 24 high-order bits of v are ignored. (This means that writeByte does exactly the same thing as write for an integer argument.) The byte written by this method may be read by the readByte method of interface DataInput, which will then return a byte equal to (byte)v.
        Specified by:
        writeByte in interface DataOutput
        Parameters:
        v - the byte value to be written.

      • writeShort

        void writeShort(int v)
        Description copied from interface: java.io.DataOutput
        Writes two bytes to the output stream to represent the value of the argument. The byte values to be written, in the order shown, are: 
        
 (byte)(0xff & (v >> 8))
 (byte)(0xff & v)

        The bytes written by this method may be read by the readShort method of interface DataInput , which will then return a short equal to (short)v.

        Specified by:
        writeShort in interface DataOutput
        Parameters:
        v - the short value to be written.

      • writeChar

        void writeChar(int v)
        Description copied from interface: java.io.DataOutput
        Writes a char value, which is comprised of two bytes, to the output stream. The byte values to be written, in the order shown, are: 
        
 (byte)(0xff & (v >> 8))
 (byte)(0xff & v)

        The bytes written by this method may be read by the readChar method of interface DataInput , which will then return a char equal to (char)v.

        Specified by:
        writeChar in interface DataOutput
        Parameters:
        v - the char value to be written.

      • writeInt

        void writeInt(int v)
        Description copied from interface: java.io.DataOutput
        Writes an int value, which is comprised of four bytes, to the output stream. The byte values to be written, in the order shown, are: 
        
 (byte)(0xff & (v >> 24))
 (byte)(0xff & (v >> 16))
 (byte)(0xff & (v >>  8))
 (byte)(0xff & v)

        The bytes written by this method may be read by the readInt method of interface DataInput , which will then return an int equal to v.

        Specified by:
        writeInt in interface DataOutput
        Parameters:
        v - the int value to be written.

      • writeLong

        void writeLong(long v)
        Description copied from interface: java.io.DataOutput
        Writes a long value, which is comprised of eight bytes, to the output stream. The byte values to be written, in the order shown, are: 
        
 (byte)(0xff & (v >> 56))
 (byte)(0xff & (v >> 48))
 (byte)(0xff & (v >> 40))
 (byte)(0xff & (v >> 32))
 (byte)(0xff & (v >> 24))
 (byte)(0xff & (v >> 16))
 (byte)(0xff & (v >>  8))
 (byte)(0xff & v)

        The bytes written by this method may be read by the readLong method of interface DataInput , which will then return a long equal to v.

        Specified by:
        writeLong in interface DataOutput
        Parameters:
        v - the long value to be written.

      • writeFloat

        void writeFloat(float v)
        Description copied from interface: java.io.DataOutput
        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. The bytes written by this method may be read by the readFloat method of interface DataInput, which will then return a float equal to v.
        Specified by:
        writeFloat in interface DataOutput
        Parameters:
        v - the float value to be written.

      • writeDouble

        void writeDouble(double v)
        Description copied from interface: java.io.DataOutput
        Writes a double value, which is comprised of eight bytes, to the output stream. It does this as if it first converts this double value to a long in exactly the manner of the Double.doubleToLongBits method and then writes the long value in exactly the manner of the writeLong method. The bytes written by this method may be read by the readDouble method of interface DataInput, which will then return a double equal to v.
        Specified by:
        writeDouble in interface DataOutput
        Parameters:
        v - the double value to be written.

      • writeChars

        void writeChars(String s)
        Description copied from interface: java.io.DataOutput
        Writes every character in the string s, to the output stream, in order, two bytes per character. If s is null, a NullPointerException is thrown. If s.length is zero, then no characters 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, two bytes are actually written, high-order byte first, in exactly the manner of the writeChar method.
        Specified by:
        writeChars in interface DataOutput
        Parameters:
        s - the string value to be written.

      • writeUTF

        void writeUTF(String s)
        Description copied from interface: java.io.DataOutput
        Writes two bytes of length information to the output stream, 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 bytes written by this method may be read by the readUTF method of interface DataInput , which will then return a String equal to s.

        Specified by:
        writeUTF in interface DataOutput
        Parameters:
        s - the string value to be written.

      • writeBytes

        @Deprecated
void writeBytes(String s)
        Deprecated.
        This method is dangerous as it discards the high byte of every character. For UTF-8, use write(s.getBytes(StandardCharsets.UTF_8)).
        Description copied from interface: java.io.DataOutput
        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.

        Specified by:
        writeBytes in interface DataOutput
        Parameters:
        s - the string of bytes to be written.

      • toByteArray

        byte[] toByteArray()
        Returns the contents that have been written to this instance, as a byte array.