GeezerVison is showing docs.oracle.com — ObjectInput (Java SE 25 & JDK 25)
Interface ObjectInput
- All Superinterfaces:
AutoCloseable, DataInput
- All Known Implementing Classes:
ObjectInputStream
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:
- 1.1
- See Also:
-
-
Method Summary
Modifier and Type
Method
Description
int
Returns the number of bytes that can be read
without blocking.
void
int
int
Reads into an array of bytes.
int
read(byte[] b,
int off,
int len)
Reads into an array of bytes.
Read and return an object.
long
Methods declared in interface DataInput
readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, skipBytes
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Method Details
-
readObject
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
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
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 total number of bytes read into the buffer, or
-1 if there is no more data because the end of
the stream has been reached.
- Throws:
IOException - If an I/O error has occurred.
-
read
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 total number of bytes read into the buffer, or
-1 if there is no more data because the end of
the stream has been reached.
- Throws:
IOException - If an I/O error has occurred.IndexOutOfBoundsException - If off is negative,
len is negative, or len is greater than
b.length - off
-
skip
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
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
Closes the input stream. Must be called
to release any resources associated with
the stream.
- Specified by:
close in interface AutoCloseable- Throws:
IOException - If an I/O error has occurred.
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