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java.lang.Object | +--java.io.InputStream | +--java.io.ObjectInputStream
Nested Class Summary | |
static class |
ObjectInputStream.GetField
|
Field Summary |
Constructor Summary | |
protected |
ObjectInputStream()
|
|
ObjectInputStream(InputStream)
|
Method Summary | |
int |
available()
Returns 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 |
defaultReadObject()
|
protected boolean |
enableResolveObject(boolean)
|
int |
read()
Reads the next byte of data from the input stream. |
int |
read(byte[],
int,
int)
Reads up to len bytes of data from the input stream into
an array of bytes. |
boolean |
readBoolean()
|
byte |
readByte()
|
char |
readChar()
|
protected ObjectStreamClass |
readClassDescriptor()
|
double |
readDouble()
|
ObjectInputStream.GetField |
readFields()
|
float |
readFloat()
|
void |
readFully(byte[])
|
void |
readFully(byte[],
int,
int)
|
int |
readInt()
|
String |
readLine()
|
long |
readLong()
|
Object |
readObject()
|
protected Object |
readObjectOverride()
|
short |
readShort()
|
protected void |
readStreamHeader()
|
Object |
readUnshared()
|
int |
readUnsignedByte()
|
int |
readUnsignedShort()
|
String |
readUTF()
|
void |
registerValidation(ObjectInputValidation,
int)
|
protected Class |
resolveClass(ObjectStreamClass)
|
protected Object |
resolveObject(Object)
|
protected Class |
resolveProxyClass(String[])
|
int |
skipBytes(int)
|
Methods inherited from class java.io.InputStream |
mark, markSupported, read, reset, skip |
Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait |
Methods inherited from interface java.io.ObjectInput |
read, skip |
Constructor Detail |
public ObjectInputStream(InputStream) throws IOException
protected ObjectInputStream() throws IOException, SecurityException
Method Detail |
public final Object readObject() throws IOException, ClassNotFoundException
readObject
in interface ObjectInput
IOException
ClassNotFoundException
protected Object readObjectOverride() throws IOException, ClassNotFoundException
IOException
ClassNotFoundException
public Object readUnshared() throws IOException, ClassNotFoundException
IOException
ClassNotFoundException
public void defaultReadObject() throws IOException, ClassNotFoundException
IOException
ClassNotFoundException
public ObjectInputStream.GetField readFields() throws IOException, ClassNotFoundException
IOException
ClassNotFoundException
public void registerValidation(ObjectInputValidation, int) throws NotActiveException, InvalidObjectException
NotActiveException
InvalidObjectException
protected Class resolveClass(ObjectStreamClass) throws IOException, ClassNotFoundException
IOException
ClassNotFoundException
protected Class resolveProxyClass(String[]) throws IOException, ClassNotFoundException
IOException
ClassNotFoundException
protected Object resolveObject(Object) throws IOException
IOException
protected boolean enableResolveObject(boolean) throws SecurityException
SecurityException
protected void readStreamHeader() throws IOException, StreamCorruptedException
IOException
StreamCorruptedException
protected ObjectStreamClass readClassDescriptor() throws IOException, ClassNotFoundException
IOException
ClassNotFoundException
public int read() throws IOException
InputStream
int
in the range 0
to
255
. If no byte is available because the end of the stream
has been reached, the value -1
is returned. This method
blocks until input data is available, the end of the stream is detected,
or an exception is thrown.
A subclass must provide an implementation of this method.
read
in interface ObjectInput
read
in class InputStream
-1
if the end of the
stream is reached.
IOException
- if an I/O error occurs.public int read(byte[], int, int) throws IOException
InputStream
len
bytes of data from the 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 b
is null
, a
NullPointerException
is thrown.
If off
is negative, or len
is negative, or
off+len
is greater than the length of the array
b
, then an IndexOutOfBoundsException
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.
If the first byte cannot be read for any reason other than end of
file, then an IOException
is thrown. In particular, an
IOException
is thrown if the input stream has been closed.
The read(b,
off,
len)
method
for class InputStream
simply calls the method
read()
repeatedly. If the first such call results in an
IOException
, that exception is returned from the call to
the read(b,
off,
len)
method. If
any subsequent call to read()
results in a
IOException
, the exception is caught and treated as if it
were end of file; the bytes read up to that point are stored into
b
and the number of bytes read before the exception
occurred is returned. Subclasses are encouraged to provide a more
efficient implementation of this method.
read
in interface ObjectInput
read
in class InputStream
- the buffer into which the data is read.
- the start offset in array b
at which the data is written.
- the maximum number of bytes to read.
-1
if there is no more data because the end of
the stream has been reached.
IOException
- if an I/O error occurs.InputStream.read()
public int available() throws IOException
InputStream
The available
method for class InputStream
always returns 0
.
This method should be overridden by subclasses.
available
in interface ObjectInput
available
in class InputStream
IOException
- if an I/O error occurs.public void close() throws IOException
InputStream
The close
method of InputStream
does
nothing.
close
in interface ObjectInput
close
in class InputStream
IOException
- if an I/O error occurs.public boolean readBoolean() throws IOException
readBoolean
in interface DataInput
IOException
public byte readByte() throws IOException
readByte
in interface DataInput
IOException
public int readUnsignedByte() throws IOException
readUnsignedByte
in interface DataInput
IOException
public char readChar() throws IOException
readChar
in interface DataInput
IOException
public short readShort() throws IOException
readShort
in interface DataInput
IOException
public int readUnsignedShort() throws IOException
readUnsignedShort
in interface DataInput
IOException
public int readInt() throws IOException
readInt
in interface DataInput
IOException
public long readLong() throws IOException
readLong
in interface DataInput
IOException
public float readFloat() throws IOException
readFloat
in interface DataInput
IOException
public double readDouble() throws IOException
readDouble
in interface DataInput
IOException
public void readFully(byte[]) throws IOException
readFully
in interface DataInput
IOException
public void readFully(byte[], int, int) throws IOException
readFully
in interface DataInput
IOException
public int skipBytes(int) throws IOException
skipBytes
in interface DataInput
IOException
public String readLine() throws IOException
readLine
in interface DataInput
IOException
public String readUTF() throws IOException
readUTF
in interface DataInput
IOException
|
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