Question

i am developing a small application in Java. At certain point i need to save the object of my custom class to a text file for this i override toString() method in my custom class and then use ObjectOutputStream class to save object of my custom class to text file. Now everything works fine i.e the text file contains the text as expected. Following three lines contain major code for that

ObjectOutputStream outputStream = null;
outputStream = new ObjectOutputStream(new FileOutputStream(filename));
outputStream.writeObject(person);//person is the instance of my custom class

Now, how do i add some static data to my file along with the object data

outputStream = new ObjectOutputStream(new FileOutputStream(filename));
outputStream.WhatFunctoinToUse("some static text");//What function i use to add static text??
outputStream.writeObject(person);//person is the instance of my custom class

Answer 1

If you want to append a primitive type value to be flattened with an Object, pass your ObjectOutputStream to PrintStream to enable you append a new line which will effect hold the static value as require.

See below for both Reading and writing.

    //Writting
    ObjectOutputStream outputStream = new ObjectOutputStream(new FileOutputStream("person.out"));
    outputStream.writeObject(person);
    PrintStream pst = new PrintStream(outputStream);
    pst.append("Some static Value");

    outputStream.flush();
    outputStream.close();
    pst.close();

    // Reading
    ObjectInputStream in = new ObjectInputStream(new FileInputStream("person.out"));
    Perrson person=(Person) in.readObject();
    String staticText =in.readLine(); 
    in.close();