Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Inherited Fields](https://developer.android.com/reference/java/util/zip/CheckedInputStream#inhfields) \| [Ctors](https://developer.android.com/reference/java/util/zip/CheckedInputStream#pubctors) \| [Methods](https://developer.android.com/reference/java/util/zip/CheckedInputStream#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/java/util/zip/CheckedInputStream#inhmethods)

# CheckedInputStream

` public class CheckedInputStream `   
` ` ` ` ` extends https://developer.android.com/reference/java/io/FilterInputStream ` ` `

|---|---|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||||
| ↳ | [java.io.InputStream](https://developer.android.com/reference/java/io/InputStream) |||
|   | ↳ | [java.io.FilterInputStream](https://developer.android.com/reference/java/io/FilterInputStream) ||
|   |   | ↳ | java.util.zip.CheckedInputStream |

<br />

*** ** * ** ***

An input stream that also maintains a checksum of the data being read. The checksum can then be used to verify the integrity of the input data.
**See also:**

- `https://developer.android.com/reference/java/util/zip/Checksum`

## Summary

### Inherited fields

From class `https://developer.android.com/reference/java/io/FilterInputStream` ` protected https://developer.android.com/reference/java/io/InputStream` `https://developer.android.com/reference/java/io/FilterInputStream#in`

The input stream to be filtered.

| ### Public constructors ||
|---|---|
| ` https://developer.android.com/reference/java/util/zip/CheckedInputStream#CheckedInputStream(java.io.InputStream,%20java.util.zip.Checksum)(https://developer.android.com/reference/java/io/InputStream in, https://developer.android.com/reference/java/util/zip/Checksum cksum) ` Creates an input stream using the specified Checksum. |

| ### Public methods ||
|---|---|
| ` https://developer.android.com/reference/java/util/zip/Checksum` | ` https://developer.android.com/reference/java/util/zip/CheckedInputStream#getChecksum()() ` Returns the Checksum for this input stream. |
| ` int` | ` https://developer.android.com/reference/java/util/zip/CheckedInputStream#read()() ` Reads a byte. |
| ` int` | ` https://developer.android.com/reference/java/util/zip/CheckedInputStream#read(byte[],%20int,%20int)(byte[] buf, int off, int len) ` Reads into an array of bytes. |
| ` long` | ` https://developer.android.com/reference/java/util/zip/CheckedInputStream#skip(long)(long n) ` Skips specified number of bytes of input. |

### Inherited methods

From class ` https://developer.android.com/reference/java/io/FilterInputStream ` ` int` ` https://developer.android.com/reference/java/io/FilterInputStream#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` ` https://developer.android.com/reference/java/io/FilterInputStream#close()() `

Closes this input stream and releases any system resources associated with the stream.
` void` ` https://developer.android.com/reference/java/io/FilterInputStream#mark(int)(int readlimit) `

Marks the current position in this input stream.
` boolean` ` https://developer.android.com/reference/java/io/FilterInputStream#markSupported()() `

Tests if this input stream supports the `mark` and `reset` methods.
` int` ` https://developer.android.com/reference/java/io/FilterInputStream#read()() `

Reads the next byte of data from this input stream.
` int` ` https://developer.android.com/reference/java/io/FilterInputStream#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` ` https://developer.android.com/reference/java/io/FilterInputStream#read(byte[])(byte[] b) `

Reads up to `b.length` bytes of data from this input stream into an array of bytes.
` void` ` https://developer.android.com/reference/java/io/FilterInputStream#reset()() `

Repositions this stream to the position at the time the `mark` method was last called on this input stream.
` long` ` https://developer.android.com/reference/java/io/FilterInputStream#skip(long)(long n) `

Skips over and discards `n` bytes of data from the input stream.
From class ` https://developer.android.com/reference/java/io/InputStream ` ` int` ` https://developer.android.com/reference/java/io/InputStream#available()() `

Returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking, which may be 0, or 0 when end of stream is detected.
` void` ` https://developer.android.com/reference/java/io/InputStream#close()() `

Closes this input stream and releases any system resources associated with the stream.
` void` ` https://developer.android.com/reference/java/io/InputStream#mark(int)(int readlimit) `

Marks the current position in this input stream.
` boolean` ` https://developer.android.com/reference/java/io/InputStream#markSupported()() `

Tests if this input stream supports the `mark` and `reset` methods.
` static https://developer.android.com/reference/java/io/InputStream` ` https://developer.android.com/reference/java/io/InputStream#nullInputStream()() `

Returns a new `InputStream` that reads no bytes.
` int` ` https://developer.android.com/reference/java/io/InputStream#read(byte[])(byte[] b) `

Reads some number of bytes from the input stream and stores them into the buffer array `b`.
` abstract int` ` https://developer.android.com/reference/java/io/InputStream#read()() `

Reads the next byte of data from the input stream.
` int` ` https://developer.android.com/reference/java/io/InputStream#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.
` byte[]` ` https://developer.android.com/reference/java/io/InputStream#readAllBytes()() `

Reads all remaining bytes from the input stream.
` int` ` https://developer.android.com/reference/java/io/InputStream#readNBytes(byte[],%20int,%20int)(byte[] b, int off, int len) `

Reads the requested number of bytes from the input stream into the given byte array.
` byte[]` ` https://developer.android.com/reference/java/io/InputStream#readNBytes(int)(int len) `

Reads up to a specified number of bytes from the input stream.
` void` ` https://developer.android.com/reference/java/io/InputStream#reset()() `

Repositions this stream to the position at the time the `mark` method was last called on this input stream.
` long` ` https://developer.android.com/reference/java/io/InputStream#skip(long)(long n) `

Skips over and discards `n` bytes of data from this input stream.
` void` ` https://developer.android.com/reference/java/io/InputStream#skipNBytes(long)(long n) `

Skips over and discards exactly `n` bytes of data from this input stream.
` long` ` https://developer.android.com/reference/java/io/InputStream#transferTo(java.io.OutputStream)(https://developer.android.com/reference/java/io/OutputStream out) `

Reads all bytes from this input stream and writes the bytes to the given output stream in the order that they are read.
From class ` https://developer.android.com/reference/java/lang/Object ` ` https://developer.android.com/reference/java/lang/Object` ` https://developer.android.com/reference/java/lang/Object#clone()() `

Creates and returns a copy of this object.
` boolean` ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) `

Indicates whether some other object is "equal to" this one.
` void` ` https://developer.android.com/reference/java/lang/Object#finalize()() `

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
` final https://developer.android.com/reference/java/lang/Class<?>` ` https://developer.android.com/reference/java/lang/Object#getClass()() `

Returns the runtime class of this `Object`.
` int` ` https://developer.android.com/reference/java/lang/Object#hashCode()() `

Returns a hash code value for the object.
` final void` ` https://developer.android.com/reference/java/lang/Object#notify()() `

Wakes up a single thread that is waiting on this object's monitor.
` final void` ` https://developer.android.com/reference/java/lang/Object#notifyAll()() `

Wakes up all threads that are waiting on this object's monitor.
` https://developer.android.com/reference/java/lang/String` ` https://developer.android.com/reference/java/lang/Object#toString()() `

Returns a string representation of the object.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(long timeoutMillis, int nanos) `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait(long)(long timeoutMillis) `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait()() `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*.
From interface ` https://developer.android.com/reference/java/io/Closeable ` ` abstract void` ` https://developer.android.com/reference/java/io/Closeable#close()() `

Closes this stream and releases any system resources associated with it.
From interface ` https://developer.android.com/reference/java/lang/AutoCloseable ` ` abstract void` ` https://developer.android.com/reference/java/lang/AutoCloseable#close()() `

Closes this resource, relinquishing any underlying resources.

## Public constructors

### CheckedInputStream

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public CheckedInputStream (InputStream in, 
                Checksum cksum)
```

Creates an input stream using the specified Checksum.

<br />

| Parameters ||
|---|---|
| `in` | `InputStream`: the input stream <br /> |
| `cksum` | `Checksum`: the Checksum <br /> |

## Public methods

### getChecksum

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public Checksum getChecksum ()
```

Returns the Checksum for this input stream.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/util/zip/Checksum` | the Checksum value <br /> |

### read

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int read ()
```

Reads a byte. Will block if no input is available.

<br />

| Returns ||
|---|---|
| `int` | the byte read, or -1 if the end of the stream is reached. <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | if an I/O error has occurred |

### read

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int read (byte[] buf, 
                int off, 
                int len)
```

Reads into an array of bytes. If `len` is not zero, the method blocks until some input is available; otherwise, no bytes are read and `0` is returned.

<br />

| Parameters ||
|---|---|
| `buf` | `byte`: the buffer into which the data is read <br /> |
| `off` | `int`: the start offset in the destination array `b` <br /> |
| `len` | `int`: the maximum number of bytes read <br /> |

| Returns ||
|---|---|
| `int` | the actual number of bytes read, or -1 if the end of the stream is reached. <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | if an I/O error has occurred |
| `https://developer.android.com/reference/java/lang/IndexOutOfBoundsException` | If `off` is negative, `len` is negative, or `len` is greater than `buf.length - off` |
| `https://developer.android.com/reference/java/lang/NullPointerException` | If `buf` is `null`. |

### skip

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public long skip (long n)
```

Skips specified number of bytes of input.

<br />

| Parameters ||
|---|---|
| `n` | `long`: the number of bytes to skip <br /> |

| Returns ||
|---|---|
| `long` | the actual number of bytes skipped <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/io/IOException` | if an I/O error has occurred |