import java.io.*;
class ABC implements Serializable { }
public class SerializeABC {
public static void main(String[] args) {
ABC ab = new ABC();
try {
FileOutputStream fs = newFileOutputStream(“testSer.ser”);
ObjectOutputStream os = new ObjectOutputStream(fs);
os.writeObject(ab);
os.close();
} catch (Exception e) { e.printStackTrace(); }
try {
FileInputStream fis = new FileInputStream(“testSer.ser”);
ObjectInputStream ois = new ObjectInputStream(fis);
ab = (ABC) ois.readObject();
ois.close();
} catch (Exception e) { e.printStackTrace(); }
}
}

The following table depicts the commonly used methods defined by ObjectOutputStream:

Method Name	Description
void close()	Closes the invoking stream with an IOException.
void flush()	Flushes the output buffers.
void write(int b)	Writes a single byte to the invoking stream.
void writeChar(int c)	Writes a char to the invoking stream.
void write(byte buffer[])	Writes an array of byte to the invoking stream.
final void writeObject(Object o)	Writes an object to the invoking stream.
void writeBoolean(boolean b)	Writes a boolean to the invoking stream.
void write(byte buffer[], int offset, int numBytes)	Writes a subrange of numBytes bytes from the array buffer.