Added in API level 1

Summary: Inherited Fields | Ctors | Methods | Inherited Methods

CheckedInputStream

public class CheckedInputStream
extends FilterInputStream

java.lang.Object
↳	java.io.InputStream
	↳	java.io.FilterInputStream
		↳	java.util.zip.CheckedInputStream

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:

Checksum

Summary

Inherited fields

From class java.io.FilterInputStream


    protected
    
    
    InputStream

in

The input stream to be filtered.

Public constructors
`CheckedInputStream(InputStream in, Checksum cksum)` Creates an input stream using the specified Checksum.

Public methods
`Checksum`	`getChecksum()` Returns the Checksum for this input stream.
`int`	`read()` Reads a byte.
`int`	`read(byte[] buf, int off, int len)` Reads into an array of bytes.
`long`	`skip(long n)` Skips specified number of bytes of input.

Inherited methods

From class


        
          java.io.FilterInputStream

`int`	`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()` Closes this input stream and releases any system resources associated with the stream.
`void`	`mark(int readlimit)` Marks the current position in this input stream.
`boolean`	`markSupported()` Tests if this input stream supports the `mark` and `reset` methods.
`int`	`read()` Reads the next byte of data from this input stream.
`int`	`read(byte[] b, int off, int len)` Reads up to `len` bytes of data from this input stream into an array of bytes.
`int`	`read(byte[] b)` Reads up to `b.length` bytes of data from this input stream into an array of bytes.
`void`	`reset()` Repositions this stream to the position at the time the `mark` method was last called on this input stream.
`long`	`skip(long n)` Skips over and discards `n` bytes of data from the input stream.

From class


        
          java.io.InputStream

`int`	`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`	`close()` Closes this input stream and releases any system resources associated with the stream.
`void`	`mark(int readlimit)` Marks the current position in this input stream.
`boolean`	`markSupported()` Tests if this input stream supports the `mark` and `reset` methods.
`static InputStream`	`nullInputStream()` Returns a new `InputStream` that reads no bytes.
`int`	`read(byte[] b)` Reads some number of bytes from the input stream and stores them into the buffer array `b`.
`abstract int`	`read()` Reads the next byte of data from the input stream.
`int`	`read(byte[] b, int off, int len)` Reads up to `len` bytes of data from the input stream into an array of bytes.
`byte[]`	`readAllBytes()` Reads all remaining bytes from the input stream.
`int`	`readNBytes(byte[] b, int off, int len)` Reads the requested number of bytes from the input stream into the given byte array.
`byte[]`	`readNBytes(int len)` Reads up to a specified number of bytes from the input stream.
`void`	`reset()` Repositions this stream to the position at the time the `mark` method was last called on this input stream.
`long`	`skip(long n)` Skips over and discards `n` bytes of data from this input stream.
`void`	`skipNBytes(long n)` Skips over and discards exactly `n` bytes of data from this input stream.
`long`	`transferTo(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


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(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`	`wait(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`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

From interface


        
          java.io.Closeable


        abstract


        void


      close()

Closes this stream and releases any system resources associated with it.

From interface


        
          java.lang.AutoCloseable


        abstract


        void


      close()

Closes this resource, relinquishing any underlying resources.

Public constructors

CheckedInputStream

Added in API level 1

public CheckedInputStream (InputStream in, 
                Checksum cksum)

Creates an input stream using the specified Checksum.

Parameters
`in`	`InputStream`: the input stream
`cksum`	`Checksum`: the Checksum

Public methods

getChecksum

Added in API level 1

public Checksum getChecksum ()

Returns the Checksum for this input stream.

Returns
`Checksum`	the Checksum value

read

Added in API level 1

public int read ()

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

Returns
`int`	the byte read, or -1 if the end of the stream is reached.

Throws
`IOException`	if an I/O error has occurred

read

Added in API level 1

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.

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

Returns
`int`	the actual number of bytes read, or -1 if the end of the stream is reached.

Throws
`IOException`	if an I/O error has occurred
`IndexOutOfBoundsException`	If `off` is negative, `len` is negative, or `len` is greater than `buf.length - off`
`NullPointerException`	If `buf` is `null`.

skip

Added in API level 1

public long skip (long n)

Skips specified number of bytes of input.

Parameters
`n`	`long`: the number of bytes to skip

Returns
`long`	the actual number of bytes skipped

Throws
`IOException`	if an I/O error has occurred

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CheckedInputStream

Summary

Inherited fields

Public constructors

Public methods

Inherited methods

Public constructors

CheckedInputStream

Public methods

getChecksum

read

read

skip

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