Class java.io.DataInputStream 
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Class java.io.DataInputStream 

java.lang.Object
|
   +----java.io.InputStream
|
           +----java.io.FilterInputStream
|
                   +----java.io.DataInputStream
public class DataInputStream
extends FilterInputStream
implements DataInput
A data input stream that lets you read primitive Java data types from a stream in a portable way. Primitive data types are well understood types with associated operations. For example, Integers are considered primitive data types.
See Also:
DataOutputStream

Constructor Index

o DataInputStream(InputStream)
Creates a new DataInputStream.

Method Index

o read(byte[])
Reads data into an array of bytes.
o read(byte[], int, int)
Reads data into an array of bytes.
o readBoolean()
Reads a boolean.
o readByte()
Reads an 8 bit byte.
o readChar()
Reads a 16 bit char.
o readDouble()
Reads a 64 bit double.
o readFloat()
Reads a 32 bit float.
o readFully(byte[])
Reads bytes, blocking until all bytes are read.
o readFully(byte[], int, int)
Reads bytes, blocking until all bytes are read.
o readInt()
Reads a 32 bit int.
o readLine()
Reads in a line that has been terminated by a \n, \r, \r\n or EOF.
o readLong()
Reads a 64 bit long.
o readShort()
Reads a 16 bit short.
o readUnsignedByte()
Reads an unsigned 8 bit byte.
o readUnsignedShort()
Reads 16 bit short.
o readUTF()
Reads a UTF format String.
o readUTF(DataInput)
Reads a UTF format String from the given input stream.
o skipBytes(int)
Skips bytes, blocks until all bytes are skipped.

Constructors

o DataInputStream 
public DataInputStream(InputStream in)
Creates a new DataInputStream.
Parameters:
in - the input stream

Methods

o read 
public final int read(byte b[]) throws IOException
Reads data into an array of bytes. This method blocks until some input is available.
Parameters:
b - the buffer into which the data is read
Returns:
the actual number of bytes read, -1 is returned when the end of the stream is reached.
Throws: IOException
If an I/O error has occurred.
Overrides:
read in class FilterInputStream
o read 
public final int read(byte b[],
                        int off,
                        int len) throws IOException
Reads data into an array of bytes. This method blocks until some input is available.
Parameters:
b - the buffer into which the data is read
off - the start offset of the data
len - the maximum number of bytes read
Returns:
the actual number of bytes read, -1 is returned when the end of the stream is reached.
Throws: IOException
If an I/O error has occurred.
Overrides:
read in class FilterInputStream
o readFully 
public final void readFully(byte b[]) throws IOException
Reads bytes, blocking until all bytes are read.
Parameters:
b - the buffer into which the data is read
Throws: IOException
If an I/O error has occurred.
Throws: EOFException
If EOF reached before all bytes are read.
o readFully 
public final void readFully(byte b[],
                              int off,
                              int len) throws IOException
Reads bytes, blocking until all bytes are read.
Parameters:
b - the buffer into which the data is read
off - the start offset of the data
len - the maximum number of bytes read
Throws: IOException
If an I/O error has occurred.
Throws: EOFException
If EOF reached before all bytes are read.
o skipBytes 
public final int skipBytes(int n) throws IOException
Skips bytes, blocks until all bytes are skipped.
Parameters:
n - the number of bytes to be skipped
Returns:
the actual number of bytes skipped.
Throws: IOException
If an I/O error has occurred.
o readBoolean 
public final boolean readBoolean() throws IOException
Reads a boolean.
Returns:
the boolean read.
o readByte 
public final byte readByte() throws IOException
Reads an 8 bit byte.
Returns:
the 8 bit byte read.
o readUnsignedByte 
public final int readUnsignedByte() throws IOException
Reads an unsigned 8 bit byte.
Returns:
the 8 bit byte read.
o readShort 
public final short readShort() throws IOException
Reads a 16 bit short.
Returns:
the 16 bit short read.
o readUnsignedShort 
public final int readUnsignedShort() throws IOException
Reads 16 bit short.
Returns:
the 16 bit short read.
o readChar 
public final char readChar() throws IOException
Reads a 16 bit char.
Returns:
the read 16 bit char.
o readInt 
public final int readInt() throws IOException
Reads a 32 bit int.
Returns:
the 32 bit integer read.
o readLong 
public final long readLong() throws IOException
Reads a 64 bit long.
Returns:
the 64 bit long read.
o readFloat 
public final float readFloat() throws IOException
Reads a 32 bit float.
Returns:
the read 32 bit float.
o readDouble 
public final double readDouble() throws IOException
Reads a 64 bit double.
Returns:
the 64 bit double read.
o readLine 
public final String readLine() throws IOException
Reads in a line that has been terminated by a \n, \r, \r\n or EOF.
Returns:
a String copy of the line.
o readUTF 
public final String readUTF() throws IOException
Reads a UTF format String.
Returns:
the String.
o readUTF 
public final static String readUTF(DataInput in) throws IOException
Reads a UTF format String from the given input stream.
Returns:
the String. 
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