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JavaTM 2 Platform Std. Ed. v1.3.1 |
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java.io
Interface ObjectInput
- All Superinterfaces:
- DataInput
- All Known Implementing Classes:
- ObjectInputStream
- public interface ObjectInput
- extends DataInput
ObjectInput extends the DataInput interface to include the reading of objects. DataInput includes methods for the input of primitive types, ObjectInput extends that interface to include objects, arrays, and Strings.
- Since:
- JDK1.1
- See Also:
InputStream,ObjectOutputStream,ObjectInputStream
| Method Summary | |
int |
available()
Returns the number of bytes that can be read without blocking. |
void |
close()
Closes the input stream. |
int |
read()
Reads a byte of data. |
int |
read(byte[] b)
Reads into an array of bytes. |
int |
read(byte[] b,
int off,
int len)
Reads into an array of bytes. |
Object |
readObject()
Read and return an object. |
long |
skip(long n)
Skips n bytes of input. |
| Methods inherited from interface java.io.DataInput |
readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, skipBytes |
| Method Detail |
readObject
public Object readObject() throws ClassNotFoundException, IOException
- Read and return an object. The class that implements this interface
defines where the object is "read" from.
- Returns:
- the object read from the stream
- Throws:
ClassNotFoundException- If the class of a serialized object cannot be found.IOException- If any of the usual Input/Output related exceptions occur.
read
public int read()
throws IOException
- Reads a byte of data. This method will block if no input is
available.
- Returns:
- the byte read, or -1 if the end of the stream is reached.
- Throws:
IOException- If an I/O error has occurred.
read
public int read(byte[] b)
throws IOException
- Reads into an array of bytes. This method will
block until some input is available.
- Parameters:
b- the buffer into which the data is read- Returns:
- the actual number of bytes read, -1 is returned when the end of the stream is reached.
- Throws:
IOException- If an I/O error has occurred.
read
public int read(byte[] b,
int off,
int len)
throws IOException
- Reads into an array of bytes. This method will
block until some input is available.
- Parameters:
b- the buffer into which the data is readoff- the start offset of the datalen- the maximum number of bytes read- Returns:
- the actual number of bytes read, -1 is returned when the end of the stream is reached.
- Throws:
IOException- If an I/O error has occurred.
skip
public long skip(long n)
throws IOException
- Skips n bytes of input.
- Parameters:
n- the number of bytes to be skipped- Returns:
- the actual number of bytes skipped.
- Throws:
IOException- If an I/O error has occurred.
available
public int available()
throws IOException
- Returns the number of bytes that can be read
without blocking.
- Returns:
- the number of available bytes.
- Throws:
IOException- If an I/O error has occurred.
close
public void close()
throws IOException
- Closes the input stream. Must be called
to release any resources associated with
the stream.
- Throws:
IOException- If an I/O error has occurred.
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JavaTM 2 Platform Std. Ed. v1.3.1 |
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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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