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Java Source Code / Java Documentation » Apache Harmony Java SE » java package » java.io

Source Cross Reference Class Diagram Java Document (Java Doc)

java.io .DataInput

All known Subclasses:   java.io .DataInputStream,  java.io .RandomAccessFile,
DataInput
public interface DataInput (Code)
DataInput is an interface which declares methods for reading in typed data from a Stream. Typically, this stream has been written by a class which implements DataOutput. Types that can be read include byte, 16-bit short, 32-bit int, 32-bit float, 64-bit long, 64-bit double, byte strings, and UTF Strings.
See Also:   DataInputStream
See Also:   RandomAccessFile

Method Summary
abstract public boolean readBoolean()
     Reads a boolean from this stream.
abstract public byte readByte()
     Reads an 8-bit byte value from this stream.
abstract public char readChar()
     Reads a 16-bit character value from this stream.
abstract public double readDouble()
     Reads a 64-bit double value from this stream.
abstract public float readFloat()
     Reads a 32-bit float value from this stream.
abstract public void readFully(byte[] buffer)
     Reads bytes from this stream into the byte array buffer.
abstract public void readFully(byte[] buffer, int offset, int count)
     Read bytes from this stream and stores them in byte array buffer starting at offset offset.
abstract public int readInt()
     Reads a 32-bit integer value from this stream.
abstract public String readLine()
     Answers a String representing the next line of text available in this BufferedReader.
abstract public long readLong()
     Reads a 64-bit long value from this stream.
abstract public short readShort()
     Reads a 16-bit short value from this stream.
abstract public String readUTF()
     Reads a UTF format String from this Stream.
abstract public int readUnsignedByte()
     Reads an unsigned 8-bit byte value from this stream and returns it as an int.
abstract public int readUnsignedShort()
     Reads a 16-bit unsigned short value from this stream and returns it as an int.
abstract public int skipBytes(int count)
     Skips count number of bytes in this stream.

Method Detail
readBoolean
abstract public boolean readBoolean() throws IOException(Code)
Reads a boolean from this stream. the next boolean value from the source stream.
throws:
  IOException - If a problem occurs reading from this stream.
See Also:   DataOutput.writeBoolean(boolean)

readByte
abstract public byte readByte() throws IOException(Code)
Reads an 8-bit byte value from this stream. the next byte value from the source stream.
throws:
  IOException - If a problem occurs reading from this stream.
See Also:   DataOutput.writeByte(int)

readChar
abstract public char readChar() throws IOException(Code)
Reads a 16-bit character value from this stream. the next char value from the source stream.
throws:
  IOException - If a problem occurs reading from this stream.
See Also:   DataOutput.writeChar(int)

readDouble
abstract public double readDouble() throws IOException(Code)
Reads a 64-bit double value from this stream. the next double value from the source stream.
throws:
  IOException - If a problem occurs reading from this stream.
See Also:   DataOutput.writeDouble(double)

readFloat
abstract public float readFloat() throws IOException(Code)
Reads a 32-bit float value from this stream. the next float value from the source stream.
throws:
  IOException - If a problem occurs reading from this stream.
See Also:   DataOutput.writeFloat(float)

readFully
abstract public void readFully(byte[] buffer) throws IOException(Code)
Reads bytes from this stream into the byte array buffer. This method will block until buffer.length number of bytes have been read.
Parameters:
  buffer - the buffer to read bytes into
throws:
  IOException - If a problem occurs reading from this stream.
See Also:   DataOutput.write(byte[])
See Also:   DataOutput.write(byte[]intint)

readFully
abstract public void readFully(byte[] buffer, int offset, int count) throws IOException(Code)
Read bytes from this stream and stores them in byte array buffer starting at offset offset. This method blocks until count number of bytes have been read.
Parameters:
  buffer - the byte array in which to store the read bytes.
Parameters:
  offset - the offset in buffer to store the read bytes.
Parameters:
  count - the maximum number of bytes to store in buffer.
throws:
  IOException - If a problem occurs reading from this stream.
See Also:   DataOutput.write(byte[])
See Also:   DataOutput.write(byte[]intint)

readInt
abstract public int readInt() throws IOException(Code)
Reads a 32-bit integer value from this stream. the next int value from the source stream.
throws:
  IOException - If a problem occurs reading from this stream.
See Also:   DataOutput.writeInt(int)

readLine
abstract public String readLine() throws IOException(Code)
Answers a String representing the next line of text available in this BufferedReader. A line is represented by 0 or more characters followed by '\n', '\r', "\n\r" or end of stream. The String does not include the newline sequence. the contents of the line or null if no characters were readbefore end of stream.
throws:
  IOException - If a problem occurs reading from this stream.

readLong
abstract public long readLong() throws IOException(Code)
Reads a 64-bit long value from this stream. the next long value from the source stream.
throws:
  IOException - If a problem occurs reading from this stream.
See Also:   DataOutput.writeLong(long)

readShort
abstract public short readShort() throws IOException(Code)
Reads a 16-bit short value from this stream. the next short value from the source stream.
throws:
  IOException - If a problem occurs reading from this stream.
See Also:   DataOutput.writeShort(int)

readUTF
abstract public String readUTF() throws IOException(Code)
Reads a UTF format String from this Stream. the next UTF String from the source stream.
throws:
  IOException - If a problem occurs reading from this stream.
See Also:   DataOutput.writeUTF(java.lang.String)

readUnsignedByte
abstract public int readUnsignedByte() throws IOException(Code)
Reads an unsigned 8-bit byte value from this stream and returns it as an int. the next unsigned byte value from the source stream.
throws:
  IOException - If a problem occurs reading from this stream.
See Also:   DataOutput.writeByte(int)

readUnsignedShort
abstract public int readUnsignedShort() throws IOException(Code)
Reads a 16-bit unsigned short value from this stream and returns it as an int. the next unsigned short value from the sourcestream.
throws:
  IOException - If a problem occurs reading from this stream.
See Also:   DataOutput.writeShort(int)

skipBytes
abstract public int skipBytes(int count) throws IOException(Code)
Skips count number of bytes in this stream. Subsequent read()'s will not return these bytes unless reset() is used.
Parameters:
  count - the number of bytes to skip. the number of bytes actually skipped.
throws:
  IOException - If a problem occurs reading from this stream.

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