Java tutorial
import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; public class Main extends ObjectInputStream { public Main(InputStream in) throws IOException { super(in); } public static void main(String[] args) throws Exception { String s = "Hello World from java2s.com"; FileOutputStream out = new FileOutputStream("test.txt"); ObjectOutputStream oout = new ObjectOutputStream(out); oout.writeObject(s); oout.flush(); oout.close(); Main ois = new Main(new FileInputStream("test.txt")); System.out.println((String) ois.readObjectOverride()); ois.close(); } }