Uses of Class
java.io.IOException

Packages that use IOException

Package	Description
java.io
java.lang
java.net
java.util.zip	Provides classes for reading and writing the standard ZIP and GZIP file formats.

Uses of IOException in java.io

Subclasses of IOException in java.io

Modifier and Type	Class and Description
class	EOFException Signals that an end of file or end of stream has been reached unexpectedly during input.
class	InvalidClassException Thrown when the Serialization runtime detects one of the following problems with a Class.
class	InvalidObjectException Indicates that one or more deserialized objects failed validation tests.
class	NotActiveException Thrown when serialization or deserialization is not active.
class	NotSerializableException Thrown when an instance is required to have a Serializable interface.
class	ObjectStreamException Superclass of all exceptions specific to Object Stream classes.
class	OptionalDataException Exception indicating the failure of an object read operation due to unread primitive data, or the end of data belonging to a serialized object in the stream.
class	StreamCorruptedException Thrown when control information that was read from an object stream violates internal consistency checks.
class	UnsupportedEncodingException The Character Encoding is not supported.
class	UTFDataFormatException Signals that a malformed string in modified UTF-8 format has been read in a data input stream or by any class that implements the data input interface.
class	WriteAbortedException Signals that one of the ObjectStreamExceptions was thrown during a write operation.

Methods in java.io that throw IOException

Modifier and Type	Method and Description
protected void	ObjectOutputStream.annotateClass(Class<?> cl) Subclasses may implement this method to allow class data to be stored in the stream.
protected void	ObjectOutputStream.annotateProxyClass(Class<?> cl) Subclasses may implement this method to store custom data in the stream along with descriptors for dynamic proxy classes.
int	PushbackInputStream.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 invocation of a method for this input stream.
int	ObjectInputStream.available() Returns the number of bytes that can be read without blocking.
int	ObjectInput.available() Returns the number of bytes that can be read without blocking.
int	InputStream.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 invocation of a method for this input stream.
int	FilterInputStream.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.
abstract void	Reader.close() Closes the stream and releases any system resources associated with it.
void	PushbackInputStream.close() Closes this input stream and releases any system resources associated with the stream.
void	OutputStream.close() Closes this output stream and releases any system resources associated with this stream.
void	ObjectOutputStream.close() Closes the stream.
void	ObjectOutput.close() Closes the stream.
void	ObjectInputStream.close() Closes the input stream.
void	ObjectInput.close() Closes the input stream.
void	InputStreamReader.close()
void	InputStream.close() Closes this input stream and releases any system resources associated with the stream.
void	FilterOutputStream.close() Closes this output stream and releases any system resources associated with the stream.
void	FilterInputStream.close() Closes this input stream and releases any system resources associated with the stream.
void	Closeable.close() Closes this stream and releases any system resources associated with it.
void	ByteArrayOutputStream.close() Closing a ByteArrayOutputStream has no effect.
void	ByteArrayInputStream.close() Closing a ByteArrayInputStream has no effect.
void	BufferedReader.close()
abstract boolean	ObjectInputStream.GetField.defaulted(String name) Return true if the named field is defaulted and has no value in this stream.
void	ObjectInputStream.defaultReadObject() Read the non-static and non-transient fields of the current class from this stream.
void	ObjectOutputStream.defaultWriteObject() Write the non-static and non-transient fields of the current class to this stream.
protected void	ObjectOutputStream.drain() Drain any buffered data in ObjectOutputStream.
void	OutputStream.flush() Flushes this output stream and forces any buffered output bytes to be written out.
void	ObjectOutputStream.flush() Flushes the stream.
void	ObjectOutput.flush() Flushes the stream.
void	Flushable.flush() Flushes this stream by writing any buffered output to the underlying stream.
void	FilterOutputStream.flush() Flushes this output stream and forces any buffered output bytes to be written out to the stream.
void	DataOutputStream.flush() Flushes this data output stream.
void	BufferedOutputStream.flush() Flushes this buffered output stream.
abstract boolean	ObjectInputStream.GetField.get(String name, boolean val) Get the value of the named boolean field from the persistent field.
abstract byte	ObjectInputStream.GetField.get(String name, byte val) Get the value of the named byte field from the persistent field.
abstract char	ObjectInputStream.GetField.get(String name, char val) Get the value of the named char field from the persistent field.
abstract double	ObjectInputStream.GetField.get(String name, double val) Get the value of the named double field from the persistent field.
abstract float	ObjectInputStream.GetField.get(String name, float val) Get the value of the named float field from the persistent field.
abstract int	ObjectInputStream.GetField.get(String name, int val) Get the value of the named int field from the persistent field.
abstract long	ObjectInputStream.GetField.get(String name, long val) Get the value of the named long field from the persistent field.
abstract Object	ObjectInputStream.GetField.get(String name, Object val) Get the value of the named Object field from the persistent field.
abstract short	ObjectInputStream.GetField.get(String name, short val) Get the value of the named short field from the persistent field.
void	Reader.mark(int readAheadLimit) Marks the present position in the stream.
void	BufferedReader.mark(int readAheadLimit) Marks the present position in the stream.
ObjectOutputStream.PutField	ObjectOutputStream.putFields() Retrieve the object used to buffer persistent fields to be written to the stream.
int	Reader.read() Reads a single character.
int	PushbackInputStream.read() Reads the next byte of data from this input stream.
int	ObjectInputStream.read() Reads a byte of data.
int	ObjectInput.read() Reads a byte of data.
int	InputStreamReader.read() Reads a single character.
abstract int	InputStream.read() Reads the next byte of data from the input stream.
int	FilterInputStream.read() Reads the next byte of data from this input stream.
int	BufferedReader.read() Reads a single character.
int	ObjectInput.read(byte[] b) Reads into an array of bytes.
int	InputStream.read(byte[] b) Reads some number of bytes from the input stream and stores them into the buffer array b.
int	FilterInputStream.read(byte[] b) Reads up to byte.length bytes of data from this input stream into an array of bytes.
int	DataInputStream.read(byte[] b) Reads some number of bytes from the contained input stream and stores them into the buffer array b.
int	PushbackInputStream.read(byte[] b, int off, int len) Reads up to len bytes of data from this input stream into an array of bytes.
int	ObjectInputStream.read(byte[] buf, int off, int len) Reads into an array of bytes.
int	ObjectInput.read(byte[] b, int off, int len) Reads into an array of bytes.
int	InputStream.read(byte[] b, int off, int len) Reads up to len bytes of data from the input stream into an array of bytes.
int	FilterInputStream.read(byte[] b, int off, int len) Reads up to len bytes of data from this input stream into an array of bytes.
int	DataInputStream.read(byte[] b, int off, int len) Reads up to len bytes of data from the contained input stream into an array of bytes.
int	Reader.read(char[] cbuf) Reads characters into an array.
abstract int	Reader.read(char[] cbuf, int off, int len) Reads characters into a portion of an array.
int	InputStreamReader.read(char[] cbuf, int offset, int length) Reads characters into a portion of an array.
int	BufferedReader.read(char[] cbuf, int off, int len) Reads characters into a portion of an array.
boolean	ObjectInputStream.readBoolean() Reads in a boolean.
boolean	DataInputStream.readBoolean() See the general contract of the readBoolean method of DataInput.
boolean	DataInput.readBoolean() Reads one input byte and returns true if that byte is nonzero, false if that byte is zero.
byte	ObjectInputStream.readByte() Reads an 8 bit byte.
byte	DataInputStream.readByte() See the general contract of the readByte method of DataInput.
byte	DataInput.readByte() Reads and returns one input byte.
char	ObjectInputStream.readChar() Reads a 16 bit char.
char	DataInputStream.readChar() See the general contract of the readChar method of DataInput.
char	DataInput.readChar() Reads two input bytes and returns a char value.
protected ObjectStreamClass	ObjectInputStream.readClassDescriptor() Read a class descriptor from the serialization stream.
double	ObjectInputStream.readDouble() Reads a 64 bit double.
double	DataInputStream.readDouble() See the general contract of the readDouble method of DataInput.
double	DataInput.readDouble() Reads eight input bytes and returns a double value.
void	Externalizable.readExternal(ObjectInput in) The object implements the readExternal method to restore its contents by calling the methods of DataInput for primitive types and readObject for objects, strings and arrays.
ObjectInputStream.GetField	ObjectInputStream.readFields() Reads the persistent fields from the stream and makes them available by name.
float	ObjectInputStream.readFloat() Reads a 32 bit float.
float	DataInputStream.readFloat() See the general contract of the readFloat method of DataInput.
float	DataInput.readFloat() Reads four input bytes and returns a float value.
void	ObjectInputStream.readFully(byte[] buf) Reads bytes, blocking until all bytes are read.
void	DataInputStream.readFully(byte[] b) See the general contract of the readFully method of DataInput.
void	DataInput.readFully(byte[] b) Reads some bytes from an input stream and stores them into the buffer array b.
void	ObjectInputStream.readFully(byte[] buf, int off, int len) Reads bytes, blocking until all bytes are read.
void	DataInputStream.readFully(byte[] b, int off, int len) See the general contract of the readFully method of DataInput.
void	DataInput.readFully(byte[] b, int off, int len) Reads len bytes from an input stream.
int	ObjectInputStream.readInt() Reads a 32 bit int.
int	DataInputStream.readInt() See the general contract of the readInt method of DataInput.
int	DataInput.readInt() Reads four input bytes and returns an int value.
String	ObjectInputStream.readLine() Deprecated. This method does not properly convert bytes to characters. see DataInputStream for the details and alternatives.
String	DataInputStream.readLine() Deprecated. This method does not properly convert bytes to characters. As of JDK 1.1, the preferred way to read lines of text is via the BufferedReader.readLine() method. Programs that use the DataInputStream class to read lines can be converted to use the BufferedReader class by replacing code of the form: DataInputStream d = new DataInputStream(in); with: BufferedReader d = new BufferedReader(new InputStreamReader(in));
String	DataInput.readLine() Reads the next line of text from the input stream.
String	BufferedReader.readLine() Reads a line of text.
long	ObjectInputStream.readLong() Reads a 64 bit long.
long	DataInputStream.readLong() See the general contract of the readLong method of DataInput.
long	DataInput.readLong() Reads eight input bytes and returns a long value.
Object	ObjectInputStream.readObject() Read an object from the ObjectInputStream.
Object	ObjectInput.readObject() Read and return an object.
protected Object	ObjectInputStream.readObjectOverride() This method is called by trusted subclasses of ObjectOutputStream that constructed ObjectOutputStream using the protected no-arg constructor.
short	ObjectInputStream.readShort() Reads a 16 bit short.
short	DataInputStream.readShort() See the general contract of the readShort method of DataInput.
short	DataInput.readShort() Reads two input bytes and returns a short value.
protected void	ObjectInputStream.readStreamHeader() The readStreamHeader method is provided to allow subclasses to read and verify their own stream headers.
Object	ObjectInputStream.readUnshared() Reads an "unshared" object from the ObjectInputStream.
int	ObjectInputStream.readUnsignedByte() Reads an unsigned 8 bit byte.
int	DataInputStream.readUnsignedByte() See the general contract of the readUnsignedByte method of DataInput.
int	DataInput.readUnsignedByte() Reads one input byte, zero-extends it to type int, and returns the result, which is therefore in the range 0 through 255.
int	ObjectInputStream.readUnsignedShort() Reads an unsigned 16 bit short.
int	DataInputStream.readUnsignedShort() See the general contract of the readUnsignedShort method of DataInput.
int	DataInput.readUnsignedShort() Reads two input bytes and returns an int value in the range 0 through 65535.
String	ObjectInputStream.readUTF() Reads a String in modified UTF-8 format.
String	DataInputStream.readUTF() See the general contract of the readUTF method of DataInput.
String	DataInput.readUTF() Reads in a string that has been encoded using a modified UTF-8 format.
static String	DataInputStream.readUTF(DataInput in) Reads from the stream in a representation of a Unicode character string encoded in modified UTF-8 format; this string of characters is then returned as a String.
boolean	Reader.ready() Tells whether this stream is ready to be read.
boolean	InputStreamReader.ready() Tells whether this stream is ready to be read.
boolean	BufferedReader.ready() Tells whether this stream is ready to be read.
protected Object	ObjectOutputStream.replaceObject(Object obj) This method will allow trusted subclasses of ObjectOutputStream to substitute one object for another during serialization.
void	Reader.reset() Resets the stream.
void	PushbackInputStream.reset() Repositions this stream to the position at the time the mark method was last called on this input stream.
void	ObjectOutputStream.reset() Reset will disregard the state of any objects already written to the stream.
void	InputStream.reset() Repositions this stream to the position at the time the mark method was last called on this input stream.
void	FilterInputStream.reset() Repositions this stream to the position at the time the mark method was last called on this input stream.
void	BufferedReader.reset() Resets the stream to the most recent mark.
protected Class<?>	ObjectInputStream.resolveClass(ObjectStreamClass desc) Load the local class equivalent of the specified stream class description.
protected Object	ObjectInputStream.resolveObject(Object obj) This method will allow trusted subclasses of ObjectInputStream to substitute one object for another during deserialization.
protected Class<?>	ObjectInputStream.resolveProxyClass(String[] interfaces) Returns a proxy class that implements the interfaces named in a proxy class descriptor; subclasses may implement this method to read custom data from the stream along with the descriptors for dynamic proxy classes, allowing them to use an alternate loading mechanism for the interfaces and the proxy class.
long	Reader.skip(long n) Skips characters.
long	PushbackInputStream.skip(long n) Skips over and discards n bytes of data from this input stream.
long	ObjectInput.skip(long n) Skips n bytes of input.
long	InputStream.skip(long n) Skips over and discards n bytes of data from this input stream.
long	FilterInputStream.skip(long n) Skips over and discards n bytes of data from the input stream.
long	BufferedReader.skip(long n) Skips characters.
int	ObjectInputStream.skipBytes(int len) Skips bytes.
int	DataInputStream.skipBytes(int n) See the general contract of the skipBytes method of DataInput.
int	DataInput.skipBytes(int n) Makes an attempt to skip over n bytes of data from the input stream, discarding the skipped bytes.
void	PushbackInputStream.unread(byte[] b) Pushes back an array of bytes by copying it to the front of the pushback buffer.
void	PushbackInputStream.unread(byte[] b, int off, int len) Pushes back a portion of an array of bytes by copying it to the front of the pushback buffer.
void	PushbackInputStream.unread(int b) Pushes back a byte by copying it to the front of the pushback buffer.
void	ObjectOutputStream.useProtocolVersion(int version) Specify stream protocol version to use when writing the stream.
void	OutputStream.write(byte[] b) Writes b.length bytes from the specified byte array to this output stream.
void	ObjectOutputStream.write(byte[] buf) Writes an array of bytes.
void	ObjectOutput.write(byte[] b) Writes an array of bytes.
void	FilterOutputStream.write(byte[] b) Writes b.length bytes to this output stream.
void	DataOutput.write(byte[] b) Writes to the output stream all the bytes in array b.
void	OutputStream.write(byte[] b, int off, int len) Writes len bytes from the specified byte array starting at offset off to this output stream.
void	ObjectOutputStream.write(byte[] buf, int off, int len) Writes a sub array of bytes.
void	ObjectOutput.write(byte[] b, int off, int len) Writes a sub array of bytes.
void	FilterOutputStream.write(byte[] b, int off, int len) Writes len bytes from the specified byte array starting at offset off to this output stream.
void	DataOutputStream.write(byte[] b, int off, int len) Writes len bytes from the specified byte array starting at offset off to the underlying output stream.
void	DataOutput.write(byte[] b, int off, int len) Writes len bytes from array b, in order, to the output stream.
void	BufferedOutputStream.write(byte[] b, int off, int len) Writes len bytes from the specified byte array starting at offset off to this buffered output stream.
abstract void	OutputStream.write(int b) Writes the specified byte to this output stream.
void	ObjectOutputStream.write(int val) Writes a byte.
void	ObjectOutput.write(int b) Writes a byte.
void	FilterOutputStream.write(int b) Writes the specified byte to this output stream.
void	DataOutputStream.write(int b) Writes the specified byte (the low eight bits of the argument b) to the underlying output stream.
void	DataOutput.write(int b) Writes to the output stream the eight low-order bits of the argument b.
void	BufferedOutputStream.write(int b) Writes the specified byte to this buffered output stream.
abstract void	ObjectOutputStream.PutField.write(ObjectOutput out) Deprecated. This method does not write the values contained by this PutField object in a proper format, and may result in corruption of the serialization stream. The correct way to write PutField data is by calling the ObjectOutputStream.writeFields() method.
void	ObjectOutputStream.writeBoolean(boolean val) Writes a boolean.
void	DataOutputStream.writeBoolean(boolean v) Writes a boolean to the underlying output stream as a 1-byte value.
void	DataOutput.writeBoolean(boolean v) Writes a boolean value to this output stream.
void	ObjectOutputStream.writeByte(int val) Writes an 8 bit byte.
void	DataOutputStream.writeByte(int v) Writes out a byte to the underlying output stream as a 1-byte value.
void	DataOutput.writeByte(int v) Writes to the output stream the eight low- order bits of the argument v.
void	ObjectOutputStream.writeBytes(String str) Writes a String as a sequence of bytes.
void	DataOutputStream.writeBytes(String s) Writes out the string to the underlying output stream as a sequence of bytes.
void	DataOutput.writeBytes(String s) Writes a string to the output stream.
void	ObjectOutputStream.writeChar(int val) Writes a 16 bit char.
void	DataOutputStream.writeChar(int v) Writes a char to the underlying output stream as a 2-byte value, high byte first.
void	DataOutput.writeChar(int v) Writes a char value, which is comprised of two bytes, to the output stream.
void	ObjectOutputStream.writeChars(String str) Writes a String as a sequence of chars.
void	DataOutputStream.writeChars(String s) Writes a string to the underlying output stream as a sequence of characters.
void	DataOutput.writeChars(String s) Writes every character in the string s, to the output stream, in order, two bytes per character.
protected void	ObjectOutputStream.writeClassDescriptor(ObjectStreamClass desc) Write the specified class descriptor to the ObjectOutputStream.
void	ObjectOutputStream.writeDouble(double val) Writes a 64 bit double.
void	DataOutputStream.writeDouble(double v) Converts the double argument to a long using the doubleToLongBits method in class Double, and then writes that long value to the underlying output stream as an 8-byte quantity, high byte first.
void	DataOutput.writeDouble(double v) Writes a double value, which is comprised of eight bytes, to the output stream.
void	Externalizable.writeExternal(ObjectOutput out) The object implements the writeExternal method to save its contents by calling the methods of DataOutput for its primitive values or calling the writeObject method of ObjectOutput for objects, strings, and arrays.
void	ObjectOutputStream.writeFields() Write the buffered fields to the stream.
void	ObjectOutputStream.writeFloat(float val) Writes a 32 bit float.
void	DataOutputStream.writeFloat(float v) Converts the float argument to an int using the floatToIntBits method in class Float, and then writes that int value to the underlying output stream as a 4-byte quantity, high byte first.
void	DataOutput.writeFloat(float v) Writes a float value, which is comprised of four bytes, to the output stream.
void	ObjectOutputStream.writeInt(int val) Writes a 32 bit int.
void	DataOutputStream.writeInt(int v) Writes an int to the underlying output stream as four bytes, high byte first.
void	DataOutput.writeInt(int v) Writes an int value, which is comprised of four bytes, to the output stream.
void	ObjectOutputStream.writeLong(long val) Writes a 64 bit long.
void	DataOutputStream.writeLong(long v) Writes a long to the underlying output stream as eight bytes, high byte first.
void	DataOutput.writeLong(long v) Writes a long value, which is comprised of eight bytes, to the output stream.
void	ObjectOutputStream.writeObject(Object obj) Write the specified object to the ObjectOutputStream.
void	ObjectOutput.writeObject(Object obj) Write an object to the underlying storage or stream.
protected void	ObjectOutputStream.writeObjectOverride(Object obj) Method used by subclasses to override the default writeObject method.
void	ObjectOutputStream.writeShort(int val) Writes a 16 bit short.
void	DataOutputStream.writeShort(int v) Writes a short to the underlying output stream as two bytes, high byte first.
void	DataOutput.writeShort(int v) Writes two bytes to the output stream to represent the value of the argument.
protected void	ObjectOutputStream.writeStreamHeader() The writeStreamHeader method is provided so subclasses can append or prepend their own header to the stream.
void	ByteArrayOutputStream.writeTo(OutputStream out) Writes the complete contents of this byte array output stream to the specified output stream argument, as if by calling the output stream's write method using out.write(buf, 0, count).
void	ObjectOutputStream.writeUnshared(Object obj) Writes an "unshared" object to the ObjectOutputStream.
void	ObjectOutputStream.writeUTF(String str) Primitive data write of this String in modified UTF-8 format.
void	DataOutputStream.writeUTF(String str) Writes a string to the underlying output stream using modified UTF-8 encoding in a machine-independent manner.
void	DataOutput.writeUTF(String s) Writes two bytes of length information to the output stream, followed by the modified UTF-8 representation of every character in the string s.

Constructors in java.io that throw IOException

Constructor and Description
ObjectInputStream() Provide a way for subclasses that are completely reimplementing ObjectInputStream to not have to allocate private data just used by this implementation of ObjectInputStream.
ObjectInputStream(InputStream in) Creates an ObjectInputStream that reads from the specified InputStream.
ObjectOutputStream() Provide a way for subclasses that are completely reimplementing ObjectOutputStream to not have to allocate private data just used by this implementation of ObjectOutputStream.
ObjectOutputStream(OutputStream out) Creates an ObjectOutputStream that writes to the specified OutputStream.

Uses of IOException in java.lang

Methods in java.lang that throw IOException

Modifier and Type	Method and Description
Appendable	Appendable.append(char c) Appends the specified character to this Appendable.
Appendable	Appendable.append(CharSequence csq) Appends the specified character sequence to this Appendable.
Appendable	Appendable.append(CharSequence csq, int start, int end) Appends a subsequence of the specified character sequence to this Appendable.
protected Enumeration<URL>	ClassLoader.findResources(String name) Returns an enumeration of URL objects representing all the resources with the given name.
Enumeration<URL>	ClassLoader.getResources(String name) Finds all the resources with the given name.
static Enumeration<URL>	ClassLoader.getSystemResources(String name) Finds all resources of the specified name from the search path used to load classes.

Uses of IOException in java.net

Subclasses of IOException in java.net

Modifier and Type	Class and Description
class	MalformedURLException Thrown to indicate that a malformed URL has occurred.

Methods in java.net that throw IOException

Modifier and Type	Method and Description
Object	URL.getContent() Gets the contents of this URL.
Object	URL.getContent(Class[] classes) Gets the contents of this URL.
InputStream	URL.openStream() Opens a connection to this URL and returns an InputStream for reading from that connection.

Uses of IOException in java.util.zip

Subclasses of IOException in java.util.zip

Modifier and Type	Class and Description
class	ZipException Signals that a Zip exception of some sort has occurred.

Methods in java.util.zip that throw IOException

Modifier and Type	Method and Description
int	ZipInputStream.available() Returns 0 after EOF has reached for the current entry data, otherwise always return 1.
int	InflaterInputStream.available() Returns 0 after EOF has been reached, otherwise always return 1.
void	ZipInputStream.close() Closes this input stream and releases any system resources associated with the stream.
void	InflaterInputStream.close() Closes this input stream and releases any system resources associated with the stream.
void	ZipInputStream.closeEntry() Closes the current ZIP entry and positions the stream for reading the next entry.
protected void	InflaterInputStream.fill() Fills input buffer with more data to decompress.
ZipEntry	ZipInputStream.getNextEntry() Reads the next ZIP file entry and positions the stream at the beginning of the entry data.
int	ZipInputStream.read()
int	InflaterInputStream.read() Reads a byte of uncompressed data.
int	ZipInputStream.read(byte[] b)
int	ZipInputStream.read(byte[] b, int off, int len) Reads from the current ZIP entry into an array of bytes.
int	InflaterInputStream.read(byte[] b, int off, int len) Reads uncompressed data into an array of bytes.
void	ZipInputStream.reset()
void	InflaterInputStream.reset() Repositions this stream to the position at the time the mark method was last called on this input stream.
long	ZipInputStream.skip(long n) Skips specified number of bytes in the current ZIP entry.
long	InflaterInputStream.skip(long n) Skips specified number of bytes of uncompressed data.