# DataInputStream

public class **DataInputStream** extends [FilterInputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html)  
implements [DataInput](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html) A data input stream lets an application read primitive Java data
types from an underlying input stream in a machine-independent
way. An application uses a data output stream to write data that
can later be read by a data input stream.


DataInputStream is not necessarily safe for multithreaded access.
Thread safety is optional and is the responsibility of users of
methods in this class.

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataOutputStream.html`

### Inherited Field Summary

From class [java.io.FilterInputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html)

|---|---|---|
| protected [InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html) | [in](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#in) | The input stream to be filtered. |

### Public Constructor Summary

|---|---|
|   | [DataInputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#DataInputStream(java.io.InputStream))([InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html) in) Creates a DataInputStream that uses the specified underlying InputStream. |

### Public Method Summary

|---|---|
| final int | [read](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#read(byte[]))(byte\[\] b) Reads some number of bytes from the contained input stream and stores them into the buffer array `b`. |
| final int | [read](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#read(byte[],%20int,%20int))(byte\[\] b, int off, int len) Reads up to `len` bytes of data from the contained input stream into an array of bytes. |
| final boolean | [readBoolean](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readBoolean())() See the general contract of the `readBoolean` method of `DataInput`. |
| final byte | [readByte](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readByte())() See the general contract of the `readByte` method of `DataInput`. |
| final char | [readChar](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readChar())() See the general contract of the `readChar` method of `DataInput`. |
| final double | [readDouble](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readDouble())() See the general contract of the `readDouble` method of `DataInput`. |
| final float | [readFloat](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readFloat())() See the general contract of the `readFloat` method of `DataInput`. |
| final void | [readFully](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readFully(byte[]))(byte\[\] b) See the general contract of the `readFully` method of `DataInput`. |
| final void | [readFully](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readFully(byte[],%20int,%20int))(byte\[\] b, int off, int len) See the general contract of the `readFully` method of `DataInput`. |
| final int | [readInt](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readInt())() See the general contract of the `readInt` method of `DataInput`. |
| final [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) | [readLine](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readLine())() *This method is deprecated. This method does not properly convert bytes to characters. As of JDK 1.1, the preferred way to read lines of text is via the `BufferedReader.readLine()` method. Programs that use the `DataInputStream` class to read lines can be converted to use the `BufferedReader` class by replacing code of the form: > ``` > DataInputStream d = new DataInputStream(in); > > ``` with: > ``` > BufferedReader d > = new BufferedReader(new InputStreamReader(in)); > > ```* |
| final long | [readLong](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readLong())() See the general contract of the `readLong` method of `DataInput`. |
| final short | [readShort](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readShort())() See the general contract of the `readShort` method of `DataInput`. |
| final [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) | [readUTF](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readUTF())() See the general contract of the `readUTF` method of `DataInput`. |
| final static [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) | [readUTF](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readUTF(java.io.DataInput))([DataInput](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html) in) Reads from the stream `in` a representation of a Unicode character string encoded in [modified UTF-8](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput#modified-utf-8) format; this string of characters is then returned as a `String`. |
| final int | [readUnsignedByte](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readUnsignedByte())() See the general contract of the `readUnsignedByte` method of `DataInput`. |
| final int | [readUnsignedShort](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readUnsignedShort())() See the general contract of the `readUnsignedShort` method of `DataInput`. |
| final int | [skipBytes](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#skipBytes(int))(int n) See the general contract of the `skipBytes` method of `DataInput`. |

### Inherited Method Summary

From class [java.io.FilterInputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html)

|---|---|
| int | [available](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#available())() Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking by the next caller of a method for this input stream. |
| void | [close](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#close())() Closes this input stream and releases any system resources associated with the stream. |
| synchronized void | [mark](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#mark(int))(int readlimit) Marks the current position in this input stream. |
| boolean | [markSupported](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#markSupported())() Tests if this input stream supports the `mark` and `reset` methods. |
| int | [read](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#read())() Reads the next byte of data from this input stream. |
| int | [read](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#read(byte[],%20int,%20int))(byte\[\] b, int off, int len) Reads up to `len` bytes of data from this input stream into an array of bytes. |
| int | [read](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#read(byte[]))(byte\[\] b) Reads up to `byte.length` bytes of data from this input stream into an array of bytes. |
| synchronized void | [reset](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#reset())() Repositions this stream to the position at the time the `mark` method was last called on this input stream. |
| long | [skip](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#skip(long))(long n) Skips over and discards `n` bytes of data from the input stream. |

From class [java.io.InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html)

|---|---|
| int | [available](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#available())() Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking by the next invocation of a method for this input stream. |
| void | [close](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#close())() Closes this input stream and releases any system resources associated with the stream. |
| synchronized void | [mark](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#mark(int))(int readlimit) Marks the current position in this input stream. |
| boolean | [markSupported](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#markSupported())() Tests if this input stream supports the `mark` and `reset` methods. |
| abstract int | [read](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#read())() Reads the next byte of data from the input stream. |
| int | [read](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#read(byte[],%20int,%20int))(byte\[\] b, int off, int len) Reads up to `len` bytes of data from the input stream into an array of bytes. |
| int | [read](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#read(byte[]))(byte\[\] b) Reads some number of bytes from the input stream and stores them into the buffer array `b`. |
| synchronized void | [reset](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#reset())() Repositions this stream to the position at the time the `mark` method was last called on this input stream. |
| long | [skip](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#skip(long))(long n) Skips over and discards `n` bytes of data from this input stream. |

From class [java.lang.Object](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html)

|---|---|
| [Object](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html) | [clone](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#clone())() Creates and returns a copy of this `Object`. |
| boolean | [equals](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#equals(java.lang.Object))([Object](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html) obj) Compares this instance with the specified object and indicates if they are equal. |
| void | [finalize](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#finalize())() Invoked when the garbage collector has detected that this instance is no longer reachable. |
| final [Class](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Class.html)\<?\> | [getClass](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#getClass())() Returns the unique instance of `https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Class.html` that represents this object's class. |
| int | [hashCode](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#hashCode())() Returns an integer hash code for this object. |
| final void | [notify](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#notify())() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up. |
| final void | [notifyAll](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#notifyAll())() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up. |
| [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) | [toString](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#toString())() Returns a string containing a concise, human-readable description of this object. |
| final void | [wait](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#wait(long,%20int))(long timeout, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires. |
| final void | [wait](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#wait(long))(long timeout) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires. |
| final void | [wait](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#wait())() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object. |

From interface [java.io.Closeable](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/Closeable.html)

|---|---|
| abstract void | [close](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/Closeable.html#close())() Closes this stream and releases any system resources associated with it. |

From interface [java.io.DataInput](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html)

|---|---|
| abstract boolean | [readBoolean](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html#readBoolean())() Reads one input byte and returns `true` if that byte is nonzero, `false` if that byte is zero. |
| abstract byte | [readByte](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html#readByte())() Reads and returns one input byte. |
| abstract char | [readChar](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html#readChar())() Reads two input bytes and returns a `char` value. |
| abstract double | [readDouble](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html#readDouble())() Reads eight input bytes and returns a `double` value. |
| abstract float | [readFloat](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html#readFloat())() Reads four input bytes and returns a `float` value. |
| abstract void | [readFully](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html#readFully(byte[]))(byte\[\] b) Reads some bytes from an input stream and stores them into the buffer array `b`. |
| abstract void | [readFully](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html#readFully(byte[],%20int,%20int))(byte\[\] b, int off, int len) Reads `len` bytes from an input stream. |
| abstract int | [readInt](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html#readInt())() Reads four input bytes and returns an `int` value. |
| abstract [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) | [readLine](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html#readLine())() Reads the next line of text from the input stream. |
| abstract long | [readLong](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html#readLong())() Reads eight input bytes and returns a `long` value. |
| abstract short | [readShort](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html#readShort())() Reads two input bytes and returns a `short` value. |
| abstract [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) | [readUTF](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html#readUTF())() Reads in a string that has been encoded using a [modified UTF-8](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream#modified-utf-8) format. |
| abstract int | [readUnsignedByte](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html#readUnsignedByte())() Reads one input byte, zero-extends it to type `int`, and returns the result, which is therefore in the range `0` through `255`. |
| abstract int | [readUnsignedShort](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html#readUnsignedShort())() Reads two input bytes and returns an `int` value in the range `0` through `65535`. |
| abstract int | [skipBytes](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html#skipBytes(int))(int n) Makes an attempt to skip over `n` bytes of data from the input stream, discarding the skipped bytes. |

From interface [java.lang.AutoCloseable](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/AutoCloseable.html)

|---|---|
| abstract void | [close](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/AutoCloseable.html#close())() Closes this resource, relinquishing any underlying resources. |

## Public Constructors

#### public
**DataInputStream**
([InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html) in)

Creates a DataInputStream that uses the specified
underlying InputStream.

##### Parameters

| in | the specified input stream |
|---|---|

## Public Methods

#### public final int
**read**
(byte\[\] b)

Reads some number of bytes from the contained input stream and
stores them into the buffer array `b`. The number of
bytes actually read is returned as an integer. This method blocks
until input data is available, end of file is detected, or an
exception is thrown.

If `b` is null, a `NullPointerException` is
thrown. If the length of `b` is zero, then no bytes are
read and `0` is returned; otherwise, there is an attempt
to read at least one byte. If no byte is available because the
stream is at end of file, the value `-1` is returned;
otherwise, at least one byte is read and stored into `b`.

The first byte read is stored into element `b[0]`, the
next one into `b[1]`, and so on. The number of bytes read
is, at most, equal to the length of `b`. Let `k`
be the number of bytes actually read; these bytes will be stored in
elements `b[0]` through `b[k-1]`, leaving
elements `b[k]` through `b[b.length-1]`
unaffected.

The `read(b)` method has the same effect as:
>
> ```
>  read(b, 0, b.length)
>  
> ```

<br />

##### Parameters

| b | the buffer into which the data is read. |
|---|---|

##### Returns

- the total number of bytes read into the buffer, or `-1` if there is no more data because the end of the stream has been reached.

##### Throws

| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | if the first byte cannot be read for any reason other than end of file, the stream has been closed and the underlying input stream does not support reading after close, or another I/O error occurs. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#in`
- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#read(byte[],%20int,%20int)`

#### public final int
**read**
(byte\[\] b, int off, int len)

Reads up to `len` bytes of data from the contained
input stream into an array of bytes. An attempt is made to read
as many as `len` bytes, but a smaller number may be read,
possibly zero. The number of bytes actually read is returned as an
integer.

This method blocks until input data is available, end of file is
detected, or an exception is thrown.

If `len` is zero, then no bytes are read and
`0` is returned; otherwise, there is an attempt to read at
least one byte. If no byte is available because the stream is at end of
file, the value `-1` is returned; otherwise, at least one
byte is read and stored into `b`.

The first byte read is stored into element `b[off]`, the
next one into `b[off+1]`, and so on. The number of bytes read
is, at most, equal to `len`. Let *k* be the number of
bytes actually read; these bytes will be stored in elements
`b[off]` through `b[off+`*k*`-1]`,
leaving elements `b[off+`*k*`]` through
`b[off+len-1]` unaffected.

In every case, elements `b[0]` through
`b[off]` and elements `b[off+len]` through
`b[b.length-1]` are unaffected.

##### Parameters

| b | the buffer into which the data is read. |
| off | the start offset in the destination array `b` |
| len | the maximum number of bytes read. |
|---|---|

##### Returns

- the total number of bytes read into the buffer, or `-1` if there is no more data because the end of the stream has been reached.

##### Throws

| [NullPointerException](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/NullPointerException.html) | If `b` is `null`. |
| [IndexOutOfBoundsException](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/IndexOutOfBoundsException.html) | If `off` is negative, `len` is negative, or `len` is greater than `b.length - off` |
| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | if the first byte cannot be read for any reason other than end of file, the stream has been closed and the underlying input stream does not support reading after close, or another I/O error occurs. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#in`
- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#read(byte[],%20int,%20int)`

#### public final boolean
**readBoolean**
()

See the general contract of the `readBoolean`
method of `DataInput`.


Bytes for this operation are read from the contained
input stream.

##### Returns

- the `boolean` value read.

##### Throws

| [EOFException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/EOFException.html) | if this input stream has reached the end. |
| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#in`

#### public final byte
**readByte**
()

See the general contract of the `readByte`
method of `DataInput`.


Bytes
for this operation are read from the contained
input stream.

##### Returns

- the next byte of this input stream as a signed 8-bit `byte`.

##### Throws

| [EOFException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/EOFException.html) | if this input stream has reached the end. |
| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#in`

#### public final char
**readChar**
()

See the general contract of the `readChar`
method of `DataInput`.


Bytes
for this operation are read from the contained
input stream.

##### Returns

- the next two bytes of this input stream, interpreted as a `char`.

##### Throws

| [EOFException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/EOFException.html) | if this input stream reaches the end before reading two bytes. |
| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#in`

#### public final double
**readDouble**
()

See the general contract of the `readDouble`
method of `DataInput`.


Bytes
for this operation are read from the contained
input stream.

##### Returns

- the next eight bytes of this input stream, interpreted as a `double`.

##### Throws

| [EOFException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/EOFException.html) | if this input stream reaches the end before reading eight bytes. |
| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readLong()`
- `https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Double.html#longBitsToDouble(long)`

#### public final float
**readFloat**
()

See the general contract of the `readFloat`
method of `DataInput`.


Bytes
for this operation are read from the contained
input stream.

##### Returns

- the next four bytes of this input stream, interpreted as a `float`.

##### Throws

| [EOFException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/EOFException.html) | if this input stream reaches the end before reading four bytes. |
| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readInt()`
- `https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Float.html#intBitsToFloat(int)`

#### public final void
**readFully**
(byte\[\] b)

See the general contract of the `readFully`
method of `DataInput`.


Bytes
for this operation are read from the contained
input stream.

##### Parameters

| b | the buffer into which the data is read. |
|---|---|

##### Throws

| [EOFException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/EOFException.html) | if this input stream reaches the end before reading all the bytes. |
| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#in`

#### public final void
**readFully**
(byte\[\] b, int off, int len)

See the general contract of the `readFully`
method of `DataInput`.


Bytes
for this operation are read from the contained
input stream.

##### Parameters

| b | the buffer into which the data is read. |
| off | the start offset of the data. |
| len | the number of bytes to read. |
|---|---|

##### Throws

| [EOFException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/EOFException.html) | if this input stream reaches the end before reading all the bytes. |
| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#in`

#### public final int
**readInt**
()

See the general contract of the `readInt`
method of `DataInput`.


Bytes
for this operation are read from the contained
input stream.

##### Returns

- the next four bytes of this input stream, interpreted as an `int`.

##### Throws

| [EOFException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/EOFException.html) | if this input stream reaches the end before reading four bytes. |
| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#in`

#### public final [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html)
**readLine**
()


**This method is deprecated.**   
This method does not properly convert bytes to characters.
As of JDK 1.1, the preferred way to read lines of text is via the
`BufferedReader.readLine()` method. Programs that use the
`DataInputStream` class to read lines can be converted to use
the `BufferedReader` class by replacing code of the form:
>
> ```
>      DataInputStream d = new DataInputStream(in);
>  
> ```
with:
>
> ```
>      BufferedReader d
>           = new BufferedReader(new InputStreamReader(in));
>  
> ```

<br />

See the general contract of the `readLine`
method of `DataInput`.


Bytes
for this operation are read from the contained
input stream.

##### Returns

- the next line of text from this input stream.

##### Throws

| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | if an I/O error occurs. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/BufferedReader.html#readLine()`
- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#in`

#### public final long
**readLong**
()

See the general contract of the `readLong`
method of `DataInput`.


Bytes
for this operation are read from the contained
input stream.

##### Returns

- the next eight bytes of this input stream, interpreted as a `long`.

##### Throws

| [EOFException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/EOFException.html) | if this input stream reaches the end before reading eight bytes. |
| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#in`

#### public final short
**readShort**
()

See the general contract of the `readShort`
method of `DataInput`.


Bytes
for this operation are read from the contained
input stream.

##### Returns

- the next two bytes of this input stream, interpreted as a signed 16-bit number.

##### Throws

| [EOFException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/EOFException.html) | if this input stream reaches the end before reading two bytes. |
| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#in`

#### public final [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html)
**readUTF**
()

See the general contract of the `readUTF`
method of `DataInput`.


Bytes
for this operation are read from the contained
input stream.

##### Returns

- a Unicode string.

##### Throws

| [EOFException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/EOFException.html) | if this input stream reaches the end before reading all the bytes. |
| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs. |
| [UTFDataFormatException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/UTFDataFormatException.html) | if the bytes do not represent a valid modified UTF-8 encoding of a string. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readUTF(java.io.DataInput)`

#### public static final [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html)
**readUTF**
([DataInput](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput.html) in)

Reads from the
stream `in` a representation
of a Unicode character string encoded in
[modified UTF-8](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInput#modified-utf-8) format;
this string of characters is then returned as a `String`.
The details of the modified UTF-8 representation
are exactly the same as for the `readUTF`
method of `DataInput`.

##### Parameters

| in | a data input stream. |
|---|---|

##### Returns

- a Unicode string.

##### Throws

| [EOFException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/EOFException.html) | if the input stream reaches the end before all the bytes. |
| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs. |
| [UTFDataFormatException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/UTFDataFormatException.html) | if the bytes do not represent a valid modified UTF-8 encoding of a Unicode string. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/DataInputStream.html#readUnsignedShort()`

#### public final int
**readUnsignedByte**
()

See the general contract of the `readUnsignedByte`
method of `DataInput`.


Bytes
for this operation are read from the contained
input stream.

##### Returns

- the next byte of this input stream, interpreted as an unsigned 8-bit number.

##### Throws

| [EOFException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/EOFException.html) | if this input stream has reached the end. |
| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#in`

#### public final int
**readUnsignedShort**
()

See the general contract of the `readUnsignedShort`
method of `DataInput`.


Bytes
for this operation are read from the contained
input stream.

##### Returns

- the next two bytes of this input stream, interpreted as an unsigned 16-bit integer.

##### Throws

| [EOFException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/EOFException.html) | if this input stream reaches the end before reading two bytes. |
| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/io/FilterInputStream.html#in`

#### public final int
**skipBytes**
(int n)

See the general contract of the `skipBytes`
method of `DataInput`.


Bytes for this operation are read from the contained
input stream.

##### Parameters

| n | the number of bytes to be skipped. |
|---|---|

##### Returns

- the actual number of bytes skipped.

##### Throws

| [IOException](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/IOException.html) | if the contained input stream does not support seek, or the stream has been closed and the contained input stream does not support reading after close, or another I/O error occurs. |
|---|---|