How to write binary data to a file?

How do I write a data member of a class to a file, inside a function in the class in Java?

• The normal string.value of (data member) does not work. How else can I proceed?

• Answer:

  Define an object of PrintWriter class with arg as file name for e.g. PrintWriter out=new PrintWriter(new FileOutputStream("abcd.txt")); then using println function and object of PrintWriter write the variable value to file. Full Code: import http://java.io.*; class WriteDemo {  public static void main(String[] arr)  {   int a=15;   try{     PrintWriter out=new PrintWriter(new FileOutputStream("abcd.txt"));   out.println(a);   out.close();   System.out.println("data successfully written");   }catch(Exception e)   {   System.out.println(e);   }  } }