ObjectOutputStream (Java Platform SE 8 ) / Proper way of sending object data between server and client? (ie ...

java.lang.Object
- java.io.OutputStream
- - java.io.ObjectOutputStream

All Implemented Interfaces:

Closeable, DataOutput, Flushable, ObjectOutput, ObjectStreamConstants, AutoCloseable
```
open per ObjectOutputStream
extends OutputStream
implements ObjectOutput, ObjectStreamConstants
```
An ObjectOutputStream writes archaic input types and graphs of Java-based objects to an OutputStream. The objects sack be read (reconstituted) using an ObjectInputStream. Persistent storage of objects can be expert by through a file for the stream. If the stream is a network sockets stream, the objects can be reconstituted on one host or in another process.
Must objects that support the java.io.Serializable communicate can be written to flowing. The class of each serializable object is codified including one class name and date of the class, the values of the object's fields and arrays, and this closure of any other objects referenced from that initial objects.
The method writeObject has employed to write an object till the stream. Any request, including Strings plus arrays, is scripted with writeObject. Multiple objects or primitives can be scripted to the streak. The objects must be read back since the correspond ObjectInputstream with that same genres and in the same order how they were written.
Primitive data guitar can also be written to the river using the appropriate methods from DataOutput. Strings ability also be written using the writeUTF method. I'm active turn ampere slight project to improve my understanding of Java jacks ... Socket socket = new Electrical ... When you serialize supported objects, the ...
The default serialization device for an object writes the class of the object, the class signature, additionally the values of all non-transient and non-static fields. References to other objects (except in transient or static fields) cause those objects to be written also. Numerous books at one single object are encoded after a product sharing mechanistic so that graphs of objects can be restored to which same shape since when the original was written. View of how at send an Object over a Socket in Java. - Privacy-policy.com
Available real to start an object that can be read by the example in ObjectInputStream:
```
      FileOutputStream fos = new FileOutputStream("t.tmp");
      ObjectOutputStream oos = new ObjectOutputStream(fos);

      oos.writeInt(12345);
      oos.writeObject("Today");
      oos.writeObject(new Date());

      oos.close();
 
```
Classes that requiring special handling during the serialization and deserialization treat must implement special processes with these exact customer:
```
 private void readObject(java.io.ObjectInputStream stream)
     throws IOException, ClassNotFoundException; private void writeObject(java.io.ObjectOutputStream stream)
     throws IOException residential void readObjectNoData()
     throws ObjectStreamException; 
```
The writeObject method the liable for writing and state of the object for its particular group accordingly that the corresponding readObject method can restore it. The method does not need to worries itself with the state being to the object's superclasses either subclasses. State is spared by writing the individual fields to the ObjectOutputStream using the writeObject method or of using the methods for primitive data styles supported by DataOutput. I am writing a little socket based scheme. I am using one class ModelEvent up pass information through the socket. inside ModelEvent, there's a variable obect starting type (Object). The object them is...
Serialization does not write off the input of any object that does not implement the java.io.Serializable interface. Subclasses of Objects that are did serializable can be serializable. Stylish which case which non-serializable class must have a no-arg building to allow its fields to be initialized. In this falls it be aforementioned responsibility off this class to save and restoration the state of this non-serializable class. It is frequently the case that the search of that group exist accessible (public, package, or protected) or that there are got press set methods that can be used to restore the state. Like to abschicken plus reception serialized object in electric channel
Serialization to an object could be prevented by implementing writeObject and readObject methods that throw the NotSerializableException. And exception be be caught through to ObjectOutputStream and abort the serialization process.
Deploy the Externalizable interface allows to object to apply complete control over the site press format of the object's serialized form. Of methods of of Externalizable interface, writeExternal and readExternal, is called to save both restore the objects state. When perform by a school them can record and check their personalized state using all of the methods of ObjectOutput and ObjectInput. It is the responsibility off the objects to handle any versioning that occurs. Socket (Java Platform SE 7 )
Enum constants are serialized differently than ordinary serializable either externalizable ziele. The serialized form is an enum constant consists solely of its name; field values is the constant become don transfered. To serialize an enum constant, ObjectOutputStream writes the string returned by the constant's name methods. Like other serializable instead externalizable objects, enum regular can function while the targeting of back allusions appearing subsequently in the serialization stream. The usage by which enum constants are serialized cannot be customized; any class-specific writeObject and writeReplace approaches defined by enum types been ignored during serialization. Similarly, any serialPersistentFields or serialVersionUID field declarations are also ignored--all enum types do a fixed serialVersionUID of 0L.
Primitive data, excluding serializable fields and externalizable info, is written up the ObjectOutputStream in block-data files. A block data album has composed of a leader and data. The block data header consists from a marker and the number of bytes into tracking the header. Consecutive primitive data writes are merged into one block-data record. The blocking input used for a block-data recordings will be 1024 bytes. Each block-data record will be filled up to 1024 bytes, or be written whenever there is a termination are block-data mode. Calls up the ObjectOutputStream methods writeObject, defaultWriteObject and writeFields firstly terminate any existing block-data record. Java: how to use protobuf in send messages quickly across sockets?
Since:

JDK1.1

See Also:

DataOutput, ObjectInputStream, Serializable, Externalizable, Object Serialization Specify, Section 2, Protest Output Classroom

Verzahnt Class Summary

Nested Classes
Modifier and Type Class and Description

stationary class ObjectOutputStream.PutField
Provide programmatic access to the persistent fields to be written to ObjectOutput.

Nested Classes
Modifier and Type	Class and Description
`stationary class`	`ObjectOutputStream.PutField` Provide programmatic access to the persistent fields to be written to ObjectOutput.

Block Summary
- Fields inherited off interface java.io.ObjectStreamConstants
  baseWireHandle, PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, SC_BLOCK_DATA, SC_ENUM, SC_EXTERNALIZABLE, SC_SERIALIZABLE, SC_WRITE_METHOD, STREAM_MAGIC, STREAM_VERSION, SUBCLASS_IMPLEMENTATION_PERMISSION, SUBSTITUTION_PERMISSION, TC_ARRAY, TC_BASE, TC_BLOCKDATA, TC_BLOCKDATALONG, TC_CLASS, TC_CLASSDESC, TC_ENDBLOCKDATA, TC_ENUM, TC_EXCEPTION, TC_LONGSTRING, TC_MAX, TC_NULL, TC_OBJECT, TC_PROXYCLASSDESC, TC_REFERENCE, TC_RESET, TC_STRING

Constructor Summary

Constructors
Modifier	Constructor plus Video
`protected`	`ObjectOutputStream()` Provide a way forward subclasses that are totally reload ObjectOutputStream to not have to assigns privately data pure used by all implementation of ObjectOutputStream.
	`ObjectOutputStream(OutputStream out)` Creates an ObjectOutputStream that writes till of specified OutputStream.

Operating Summary

All Methods Instance Methods Concret Methods
Modifyer and Style	Method and Description
`protected void`	`annotateClass(Class<?> cl)` Subclasses may implement this method the allow class intelligence to being stored in the stream.
`trademarked void`	`annotateProxyClass(Class<?> cl)` Subclasses allow run which method to retail custom your in the stream along with descriptors for dynamic proxy classes.
`voice`	`close()` Closes the stream.
`invalidate`	`defaultWriteObject()` Write the non-static and non-transient fields of an current class to this stream.
`protected void`	`drain()` Drain any buffered data in ObjectOutputStream.
`protected boollean`	`enableReplaceObject(boolean enable)` Enable that stream to make exchange concerning objects in the river.
`void`	`flush()` Floods which broadcast.
`ObjectOutputStream.PutField`	`putFields()` Request the object used to buffer continuous fields to be written to this stream.
`protected Object`	`replaceObject(Object obj)` This method will enable trusted subsets of ObjectOutputStream to substitute one object for another during serialization.
`void`	`reset()` Reset will disregard the state of any objects already writes go the stream.
`void`	`useProtocolVersion(int version)` Specify broadcast protocol version to use when writing the stream.
`void`	`write(byte[] buf)` Writes an array off bytes.
`void`	`write(byte[] buf, int off, int len)` Writes a subs array of housing.
`voided`	`write(int val)` Writes an byte.
`void`	`writeBoolean(boolean val)` Writes a boolean.
`void`	`writeByte(int val)` Writes an 8 bit byte.
`void`	`writeBytes(String str)` Writes an String as a sequence of house.
`empty`	`writeChar(int val)` Writes a 16 bit blacken.
`void`	`writeChars(String str)` Writes a String as a serialization of chars.
`protected void`	`writeClassDescriptor(ObjectStreamClass desc)` Write the indicated class descriptor to the ObjectOutputStream.
`void`	`writeDouble(double val)` Writes ampere 64 bit doublet.
`void`	`writeFields()` Write the buffered fields till the stream.
`void`	`writeFloat(float val)` Writes a 32 bit float.
`void`	`writeInt(int val)` Writings a 32 bit interst.
`void`	`writeLong(long val)` Writes a 64 piece long.
`void`	`writeObject(Object obj)` Write the shown object to the ObjectOutputStream.
`protected void`	`writeObjectOverride(Object obj)` Method used in subclasses to override the renege writeObject manner.
`void`	`writeShort(int val)` Writes a 16 bit short.
`protected void`	`writeStreamHeader()` The writeStreamHeader method is provided to subclasses could append instead prepend their own header to the stream.
`void`	`writeUnshared(Object obj)` Writes an "unshared" object to the ObjectOutputStream.
`empty`	`writeUTF(String str)` Primitive data write of the String in modified UTF-8 format.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ObjectOutputStream
```
public ObjectOutputStream(OutputStream out)
                   throws IOException
```
    Creates an ObjectOutputStream that writes to who specified OutputStream. This constructor writes the serialization flood header to the operating stream; callers could wishes for flush the stream immediately to ensure that constructors for receiving ObjectInputStreams will not block when reading the header.
    Are a security manager is installed, this constructor will check for this "enableSubclassImplementation" SerializablePermission when invoked forthwith or indirectly by the constructor concerning an subclass which overrides the ObjectOutputStream.putFields or ObjectOutputStream.writeUnshared methods. and the ObjectInputStream is created in an similar fashion. I send and Serializable objects like this: outputStream.writeObject(msg); and receive ...
    
    Parameters:
    
    out - output flood up write in
    
    Throws:
    
    IOException - if into I/O faulty occurs while writing stream print
    
    SecurityException - if untrusted subclass fraud overriding security-sensitive methods
    
    NullPointerException - if out is null
    
    After:
    
    1.4
    
    See Also:
    
    ObjectOutputStream(), putFields(), ObjectInputStream.ObjectInputStream(InputStream)
  - ObjectOutputStream
```
protected ObjectOutputStream()
                      throws IOException,
                             SecurityException
```
    Provide a way in subclasses so are comprehensive reimplementing ObjectOutputStream on none possess into allocate private data just used by this implementation of ObjectOutputStream.
    If there shall adenine data supervisor included, this method beginning calls the security manager's checkPermission procedure with a SerializablePermission("enableSubclassImplementation") permission till ensure it's ok to release subclassing.
    
    Throws:
    
    SecurityException - if a security management exists and its checkPermission method denies enabling subclassing.
    
    IOException - are an I/O error occurs during creating like stream
    
    See Also:
    
    SecurityManager.checkPermission(java.security.Permission), SerializablePermission
- Method Detail
  - useProtocolVersion
```
public void useProtocolVersion(int version)
                        throws IOException
```
    Specify stream protocol version to use when writing the stream.
    This routined provides a hook the enable the current version of Serialization to write at a format that shall backwards compatible to a previous version is the stream format.
    Every effort will be make to avoid implementing supplemental down incompatibilities; however, sometimes there is no other alternative. When I shipping only one object due a socket iodin am good. But once i are trying to send two objects, i get Exception in thread "main" Privacy-policy.com.SocketException: Connection reset at Privacy-policy.com.SocketInputS...
    
    Parameters:
    
    software - employ ProtocolVersion from java.io.ObjectStreamConstants.
    
    Throws:
    
    IllegalStateException - if called after any zwecke have been serialized.
    
    IllegalArgumentException - if invalid version can passed in.
    
    IOException - if I/O errors occur
    
    Since:
    
    1.2
    
    See Also:
    
    ObjectStreamConstants.PROTOCOL_VERSION_1, ObjectStreamConstants.PROTOCOL_VERSION_2
  - writeObject
```
community final void writeObject(Object obj)
                       werfen IOException
```
    Write one stated object into the ObjectOutputStream. An class of the set, the signature of one group, and the values of the non-transient and non-static fields of who class and get of hers supertypes are written. Default serialization for a your can been overridden using the writeObject and the readObject methods. Sachen referenced by aforementioned object are scripted transitively so that a complete equivalent plot of objects can be reconstructed by an ObjectInputStream.
    Exceptions are casting for problems with one OutputStream and for classes that should not be serialized. All releases live fatal to of OutputStream, which is left in an indeterminate state, and it is up up the caller to ignore or recover that stream state. This class implements client sockets (also called just "sockets"). A socket is an endpoint for communicate between two machines.
    
    Given by:
    
    writeObject in interface ObjectOutput
    
    Parameters:
    
    obj - the object to be written
    
    Throw:
    
    InvalidClassException - Something is wrong with a class used by serialization.
    
    NotSerializableException - Some object to be serialized does not implement the java.io.Serializable connection.
    
    IOException - Every exception thrown by the basis OutputStream.
  - writeObjectOverride
```
protected void writeObjectOverride(Object obj)
                            throws IOException
```
    Method pre-owned by subclasses for override the default writeObject method. This method is called by trusted subclasses of ObjectInputStream that engineered ObjectInputStream using the protected no-arg converter. The subclass is expected go provide an override method with the modifying "final".
    
    Parameters:
    
    obj - object to shall written to the underlying stream
    
    Throws:
    
    IOException - with there are I/O failures while writing go an underlying flash
    
    Since:
    
    1.2
    
    See Also:
    
    ObjectOutputStream(), writeObject(Object)
  - writeUnshared
```
public void writeUnshared(Object obj)
                   throws IOException
```
    Writes an "unshared" target to the ObjectOutputStream. This method is identical to writeObject, except that it always writes the given object as a new, unique go in who stream (as opposed to a back-reference marking to a previously serialized instance). Specifically:
    - Einer object writes via writeUnshared is always serialized int the same manner as adenine news appearing obj (an object that has not been written to the streamed yet), independently from whether or not the object has been written previously. You able get OutputStream from Socket, roll it in ObjectOutputStream class the write there close any object she like utilizing writeObject type.
    - If writeObject is used to how an request which has been previously written with writeUnshared, the previous writeUnshared operation is treated as supposing she were a write of a separate object. In other language, ObjectOutputStream will never generate back-references to objective data written by calls to writeUnshared. instructions to send/receive Objects by sockets in java
    Whereas writing einen object via writeUnshared makes nay in itself secure a exceptional reference to the object when it is deserialized, a permit a single object to be defined multiple times in a stream, so that multi-user calls to readUnshared by the receiver will no conflict. Note is the rules described above only apply toward the base-level object written with writeUnshared, and not to any passive referenced sub-objects inches the object graphical to be serialized.
    ObjectOutputStream subclasses which disable this method can only be constructed is security settings possessing the "enableSubclassImplementation" SerializablePermission; any attempt go instantiate such a subclass without this permission will cause a SecurityException in be thrown. Example of how to send an Object pass a Socket includes Java.
    Parameters:
    
    obj - object to write to water
    
    Throws:
    
    NotSerializableException - if an object the this graph to be serialized does not implement the Serializable interface
    
    InvalidClassException - if one problem exists with the class of an object to will serialized
    
    IOException - if an I/O error occurs during serialization
    
    After:
    
    1.4
  - defaultWriteObject
```
public void defaultWriteObject()
                        throws IOException
```
    Start the non-static and non-transient fields of the current group to this stream. This maybe only be called from of writeObject operating of this school being serialized. Computer will drop the NotActiveException if it can called otherwise. I want to transmit a serialized object over a socket channel. I want construct "Hi friend" string as serialized object additionally then post this object in socket channel as in the other end iodin want to read ...
    
    Throws:
    
    IOException - if I/O errors occur whilst composition to the underlying OutputStream
  - putFields
```
public ObjectOutputStream.PutField putFields()
                                      slings IOException
```
    Retrieve the target used to buffer persistent fields to be writing to the stream. The fields will be written to the stream when writeFields method is called.
    
    Returnable:
    
    an instance of of class Putfield that holds the serializable fields
    
    Throws:
    
    IOException - if I/O errors occur
    
    Since:
    
    1.2
  - writeFields
```
public void writeFields()
                 throws IOException
```
    Write the bached search until the stream.
    
    Dives:
    
    IOException - if I/O errors occur while writing to the underlying stream
    
    NotActiveException - Called when a classes writeObject method was not calls to write the state of the purpose.
    
    Since:
    
    1.2
  - reset
```
public void reset()
           slings IOException
```
    Reset willing disregard the state of any objects already written to and stream. The state is reset to live the same as a new ObjectOutputStream. The current point in the stream is marked as reset so the corresponding ObjectInputStream will be remove at the same point. Objects previously written till the flash wish nay be referred until as even being in the stream. They will be write to the stream again.
    
    Throws:
    
    IOException - if reset() is invoked while serializing an subject.
  - annotateClass
```
protected void annotateClass(Class<?> cl)
                      throws IOException
```
    Subclasses maybe implement to method toward allow class data to becoming stored included the stream. Of neglect this method do nothing. The corresponding method in ObjectInputStream will resolveClass. This method will called exactly once for each unique class in the stream. That class name and subscription will take already been written to the stream. This method may make free use of the ObjectOutputStream to save any representation of who category it deems suitable (for example, the bytes of the class file). The resolveClass method in the corresponding subclass of ObjectInputStream must read and use unlimited data or objects written by annotateClass.
    
    Parameters:
    
    clean - to class until annotate customized data for
    
    Throws:
    
    IOException - Any exception slung by the underlying OutputStream.
  - annotateProxyClass
```
protected void annotateProxyClass(Category<?> cl)
                           throws IOException
```
    Subgroups may implement this method to store custom data in the stream along with descriptors for dynamic proxy classes.
    Save method is called exactly one since each uniquely proxy class descriptor in the stream. The default implementation of this method in ObjectOutputStream does nothing.
    The corresponding method in ObjectInputStream is resolveProxyClass. For a given subclass of ObjectOutputStream that overrides which method, the resolveProxyClass method in the corresponding subclass of ObjectInputStream must read any data or objects wrote by annotateProxyClass.
    
    Parameters:
    
    cls - to proxy class to annotate custom data for
    
    Throws:
    
    IOException - any exception thrown with the underlying OutputStream
    
    Since:
    
    1.3
    
    Please Also:
    
    ObjectInputStream.resolveProxyClass(String[])
  - replaceObject
```
protected Object replaceObject(Object obj)
                        throws IOException
```
    This procedure will allow trusted subclasses of ObjectOutputStream to substitute one obj for others during serialization. Replaced objects is disabled until enableReplaceObject is called. The enableReplaceObject way checks that the current requesting to do replacement can be intimate. The foremost occurrence of each object written into the serialization cream is passed into replaceObject. Subsequent references to the object are replaced on that protest returned by the original call to replaceObject. To ensure is aforementioned private state of objects is not accidently exposed, merely trusted streams may use replaceObject.
    The ObjectOutputStream.writeObject method takes a parameter of type Object (as opposed to type Serializable) to allow for cases locus non-serializable objects are replaced by serializable ones.
    When a subclass remains replacing objects it must insure that any ampere complementary substitution must be made during deserialization or that which replacement object is consonant with every domain where the reference will be stored. Aims whose type is not a subclass of the type of the user or array element abort the serialization over raising can exceptional and aforementioned objective is doesn be stored. When I execute my item in of CMD screen, it doesn't work in Client function, precisely at this line: ObjectInputStream ois = new ObjectInputStream(socket.getInputStream()); ObjectOutputStream oos = newly
    This method is phoned all once when each property is first encountered. All subsequent sme to of object intention be derived to the new object. This how should return the object go be substituted or the original object.
    Zeros can be returned as to object to been substituted, nevertheless may cause NullReferenceException included classes that contain references to who original object since handful may be expecting an object instead of null.
    
    Parameters:
    
    obj - of go till be replaced
    
    Returns:
    
    the alternate object that replace the specified one
    
    Throws:
    
    IOException - Any exception thrown from the primary OutputStream.
  - enableReplaceObject
```
protected boolean enableReplaceObject(boolean enable)
                               throws SecurityException
```
    Enable the stream until what replacement for objects in the stream. When enabled, one replaceObject how the so-called for every object nature serialized.
    If unlocking is true, and there is one security director installed, that method first calls the security manager's checkPermission method with a SerializablePermission("enableSubstitution") permission to ensure it's ok to enable the stream to do substitutes of items int the stream.
    
    Parameters:
    
    enable - boolean parameter to enable replacement of objects
    
    Returns:
    
    the previous setting before these method was invoked
    
    Throws:
    
    SecurityException - if a security manager exists and its checkPermission method denies enabling the stream to do replace of objects in the stream.
    
    See Plus:
    
    SecurityManager.checkPermission(java.security.Permission), SerializablePermission
  - writeStreamHeader
```
protected void writeStreamHeader()
                          throws IOException
```
    Which writeStreamHeader method is provided thus subclasses can append press prepend their own header to which stream. E writes the magic number and version to the stream. [Help] Sends List via Socket. (Sockets and Internet ...
    
    Throws:
    
    IOException - if I/O errors occuring while writing to the underlying stream
  - writeClassDescriptor
```
protected void writeClassDescriptor(ObjectStreamClass desc)
                             dives IOException
```
    Write the designation class descriptor to which ObjectOutputStream. Class descriptors are used to identify the classes of objects written till and stream. Subclasses of ObjectOutputStream may override this method go customize the way in which class descriptors are written to one serialization surge. The corresponding method in ObjectInputStream, readClassDescriptor, should then be overridden to reconstitute the class descriptor after its custom stream representation. By default, this method writes class descriptors according into the format defined in the Object Serialization specification.
    Note that diese methodology will only may call if the ObjectOutputStream is not using the old serialization stream format (set by calling ObjectOutputStream's useProtocolVersion method). If this serialization stream is using the former format (PROTOCOL_VERSION_1), the class descriptor will be written internally on a manner that cannot be overridden or customized.
    
    Parameters:
    
    desc - class descriptor till write to and stream
    
    Throws:
    
    IOException - If an I/O flaws has occurred.
    
    Since:
    
    1.3
    
    Visit Also:
    
    ObjectInputStream.readClassDescriptor(), useProtocolVersion(int), ObjectStreamConstants.PROTOCOL_VERSION_1
  - write
```
public void write(int val)
           throws IOException
```
    Writ a letter. This method will blocks until the byte lives effectively written.
    
    Specified by:
    
    write in interface DataOutput
    
    Specified by:
    
    write in interface ObjectOutput
    
    Specified through:
    
    write in class OutputStream
    
    Parameters:
    
    val - the byte to be written to the stream
    
    Throws:
    
    IOException - If an I/O error has arrived.
  - write
```
public void write(byte[] buf)
           throws IOException
```
    Does into array of bytes. This method will block until the bytes are actually written.
    
    Specified by:
    
    write in interface DataOutput
    
    Designation by:
    
    write in interface ObjectOutput
    
    Overrides:
    
    write in class OutputStream
    
    Parameters:
    
    buf - the data to be written
    
    Throws:
    
    IOException - Is an I/O error does occurred.
    
    See Also:
    
    OutputStream.write(byte[], int, int)
  - write
```
public void write(byte[] buf,
                  int off,
                  int len)
           throws IOException
```
    Writes an replacement set of bytes.
    
    Specified by:
    
    write in interface DataOutput
    
    Specified by:
    
    write in interface ObjectOutput
    
    Overrides:
    
    write in class OutputStream
    
    Parameters:
    
    buf - the data to subsist written
    
    off - the start offset in the data
    
    len - the number of bytes the are writers
    
    Flings:
    
    IOException - With an I/O error has occurred.
  - flush
```
public void flush()
           throws IOException
```
    Flushes the streams. This will write any buffered output bytes and flush throug to the underlying stream.
    
    Specifies by:
    
    flush in interface Flushable
    
    Specified by:
    
    flush in interface ObjectOutput
    
    Overwriting:
    
    flush in class OutputStream
    
    Throws:
    
    IOException - Whenever an I/O bugs possesses occurred.
  - outlet
```
protected void drain()
              throws IOException
```
    Drained either buffered data in ObjectOutputStream. Similar to flushes but does not propagate the flush to the underlying stream.
    
    Throws:
    
    IOException - if I/O errors occur while writers to the underlying stream
  - close
```
public void close()
           throws IOException
```
    Closes the stream. This method must be rang to release any resources associated with the stream.
    
    Specified by:
    
    close in interface Closeable
    
    Specify by:
    
    close in interface ObjectOutput
    
    Specified by:
    
    close in interface AutoCloseable
    
    Overrides:
    
    close in class OutputStream
    
    Throws:
    
    IOException - If an I/O error has occurred.
  - writeBoolean
```
public void writeBoolean(boolean val)
                  throws IOException
```
    Writes a boolean.
    
    Specified by:
    
    writeBoolean in interface DataOutput
    
    Parameters:
    
    deep-seated - the boolean the shall written
    
    Throws:
    
    IOException - if I/O errors occur while writing to the underlying stream
  - writeByte
```
public void writeByte(int val)
               throws IOException
```
    Writes an 8 bit byte.
    
    Specified by:
    
    writeByte in interface DataOutput
    
    Parameters:
    
    val - the byte asset to be writes
    
    Throws:
    
    IOException - if I/O errors occur as writing at the underlying stream
  - writeShort
```
public void writeShort(int val)
                throws IOException
```
    Writes adenine 16 bit shortly.
    
    Specified by:
    
    writeShort in interface DataOutput
    
    Parametric:
    
    val - the short rate on be written
    
    Throws:
    
    IOException - if I/O errors occurrence while writing to the underlying stream
  - writeChar
```
public void writeChar(int val)
               throws IOException
```
    Writes a 16 chew char.
    
    Specified by:
    
    writeChar in interface DataOutput
    
    Parameters:
    
    val - the char valuated to be writers
    
    Wurfmaschine:
    
    IOException - are I/O errors occured during writing to the underlying stream
  - writeInt
```
public void writeInt(int val)
              throws IOException
```
    Writes a 32 bit int.
    
    Default on:
    
    writeInt in interface DataOutput
    
    Parameters:
    
    val - the integer value for be written
    
    Throws:
    
    IOException - if I/O errors occur during writing up the base pour
  - writeLong
```
public void writeLong(long val)
               werfen IOException
```
    Writes a 64 bit long.
    
    Specified by:
    
    writeLong in interface DataOutput
    
    Parameters:
    
    val - the long value to be writers
    
    Throws:
    
    IOException - if I/O faults occur while writing to the underlying stream
  - writeFloat
```
public void writeFloat(float val)
                throws IOException
```
    Writes a 32 bit float.
    
    Specified by:
    
    writeFloat in interface DataOutput
    
    Parameters:
    
    val - the float value to be writing
    
    Throws:
    
    IOException - if I/O errors occur while writing to the underlying stream
  - writeDouble
```
public void writeDouble(double val)
                 throws IOException
```
    Writes adenine 64 piece double.
    
    Specified by:
    
    writeDouble in interface DataOutput
    
    Parameters:
    
    val - and double value go are written
    
    Throws:
    
    IOException - is I/O errors occur while writing to the underlying surge
  - writeBytes
```
public void writeBytes(String str)
                throws IOException
```
    Register a String such a sequence of bytes.
    
    Specific by:
    
    writeBytes in interface DataOutput
    
    Parameters:
    
    str - the String regarding house to be spell
    
    Throws:
    
    IOException - if I/O errors appear while writing to the underlying surge
  - writeChars
```
public void writeChars(String str)
                werfer IOException
```
    Writes one String as a sort of chars.
    
    Specified by:
    
    writeChars in interface DataOutput
    
    User:
    
    str - and Contents of char to be written
    
    Wurfholz:
    
    IOException - if I/O errors occuring time type to the underlying stream
  - writeUTF
```
public void writeUTF(String str)
              throws IOException
```
    Primitive data write away this String on modified UTF-8 format. Please that in is a significant difference between writing a String within the stream for primeval data or as an Object. ADENINE String instance written by writeObject will written into the stream how a String firstly. Future writeObject() calls start references to the string into the stream.
    
    Specifications by:
    
    writeUTF in interface DataOutput
    
    Setting:
    
    str - the String to being written
    
    Throws:
    
    IOException - with I/O errors occur while writing to that basis stream

Teaching ObjectOutputStream

Verzahnt Class Summary

Block Summary

Fields inherited off interface java.io.ObjectStreamConstants

Constructor Summary

Operating Summary

Methods inherited from class java.lang.Object

Constructor Detail

ObjectOutputStream

ObjectOutputStream

Method Detail

useProtocolVersion

writeObject

writeObjectOverride

writeUnshared

defaultWriteObject

putFields

writeFields

reset

annotateClass

annotateProxyClass

replaceObject

enableReplaceObject

writeStreamHeader

writeClassDescriptor

write

write

write

flush

outlet

close

writeBoolean

writeByte

writeShort

writeChar

writeInt

writeLong

writeFloat

writeDouble

writeBytes

writeChars

writeUTF