File I/O - Absolute Java - page 621

Display 10.15 Some Methods in the Class ObjectInputStream (part 2 of 3)

public int readInt() throws IOException

Reads an int value from the input stream and returns that int value. If readInt tries to read
a value from the file and that value was not written using the method writeInt of the class
ObjectOutputStream (or written in some equivalent way), then problems will occur. If an
attempt is made to read beyond the end of the file, an EOFException is thrown.

public int readShort() throws IOException

Reads a short value from the input stream and returns that short value. If readShort tries to
read a value from the file and that value was not written using the method writeShort of the
class ObjectOutputStream (or written in some equivalent way), then problems will occur. If an
attempt is made to read beyond the end of the file, an EOFException is thrown.

public long readLong() throws IOException

Reads a long value from the input stream and returns that long value. If readLong tries to
read a value from the file and that value was not written using the method writeLong of the
class ObjectOutputStream (or written in some equivalent way), then problems will occur. If an
attempt is made to read beyond the end of the file, an EOFException is thrown.

public double readDouble() throws IOException

Reads a double value from the input stream and returns that double value. If readDouble tries
to read a value from the file and that value was not written using the method writeDouble of the
class ObjectOutputStream (or written in some equivalent way), then problems will occur. If an
attempt is made to read beyond the end of the file, an EOFException is thrown.

public float readFloat() throws IOException

Reads a float value from the input stream and returns that float value. If readFloat tries to
read a value from the file and that value was not written using the method writeFloat of the
class ObjectOutputStream (or written in some equivalent way), then problems will occur. If an
attempt is made to read beyond the end of the file, an EOFException is thrown.

public char readChar() throws IOException
Reads a char value from the input stream and returns that char value. If readChar tries to
read a value from the file and that value was not written using the method writeChar of the
class ObjectOutputStream (or written in some equivalent way), then problems will occur. If an
attempt is made to read beyond the end of the file, an EOFException is thrown.

public boolean readBoolean() throws IOException

Reads a boolean value from the input stream and returns that boolean value. If readBoolean
tries to read a value from the file and that value was not written using the method writeBoolean
of the class ObjectOutputStream (or written in some equivalent way), then problems will
occur. If an attempt is made to read beyond the end of the file, an EOFException is thrown.

(continued)