Java IO (vii)-Object flow

Write or write an object directly

Transient keywords

Serializable interface

Externalizable interface

Example One,

 Public classTest { Public Static voidMain (string[] args) {Try{T T=NewT (); T.K= 18; FileOutputStream Fos=NewFileOutputStream ("D:/bak/testobjectio.dat"); ObjectOutputStream Oos=NewObjectOutputStream (FOS);            Oos.writeobject (t);            Oos.flush ();                        Oos.close (); FileInputStream FIS=NewFileInputStream ("D:/bak/testobjectio.dat"); ObjectInputStream Ois=NewObjectInputStream (FIS); T T2=(T) ois.readobject (); System.out.println (t2.i+ "//" + T2.J + "//" + T2.D + "//" +T2.K); } Catch(Exception e) {e.printstacktrace (); }    }    }classTImplementsSerializable {inti = 10; intj = 9; DoubleD = 2.3; intK = 15;}

Results:

//9//2.3//

Example Two,

Modifying the variable K with transient

class Implements Serializable {    int i = ten;     int j = 9;     double d = 2.3;     transient int k =;}

Results:

//9//2.3//0

Transient modified variable k will not be written in, so the extracted k is empty, the default value of 0

Java IO (vii)-Object flow