Enum Serialization

A.java

package etf;

public class A {

	public int t;

	A(int t) {
		this.t = t;
	}

}

E.java

package etf;

public enum E {

	E1(new A(50)), E2(new A(100));

	public A a;

	E(A a) {
		this.a = a;
	}

}

Main.java

package etf;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

public class Main {
	public static void main(String[] args) {
		E e = E.E1;
		e.a.t = 2365;
		E e11 = E.E1;
		System.out.println(e11.a.t); // 2365 'cause there is only one instance of E1
		write();
		read();
	}

	private static void read() {
		ObjectInputStream objectInputStream = null;
		try {
			objectInputStream = new ObjectInputStream(new FileInputStream(
					"storage.txt"));
			E e = (E) objectInputStream.readObject();
			System.out.println(e.a.t); // 51 'cause there is only one instance of E2
		} catch (IOException e) {

		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} finally {
			if (objectInputStream != null) {
				try {
					objectInputStream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}

	private static void write() {
		E e1 = E.E2;
		e1.a.t = 51; 
		ObjectOutputStream objectOutputStream = null;
		try {
			FileOutputStream fileOutputStream = new FileOutputStream(
					"storage.txt");
			objectOutputStream = new ObjectOutputStream(fileOutputStream);
			objectOutputStream.writeObject(e1);
		} catch (IOException e) {

		} finally {
			if (objectOutputStream != null) {
				try {
					objectOutputStream.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}
}