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); // write something in the file oout.writeUTF(s); oout.flush(); // create an ObjectInputStream for the file we created before Main ois = new Main(new FileInputStream("test.txt")); // enable object resolving ois.enableResolveObject(true); // get the class for string and print the name System.out.println(ois.resolveObject(ois.readUTF())); ois.close(); } }