/*
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 */
package javainputoutput;

/**
 *
 * @author martyshov
 */
import java.io.*;
import java.nio.*;
import java.util.*;

public class JavaInputOutput {

 /**
 * @param args the command line arguments
 */
 public static void main(String[] args) throws IOException {

 String fileName = "C:/object.obj";

 class MyTestClass implements Serializable {

 int i;
 String s;
 float f;

 public MyTestClass(int i, String s, float f) {
 this.i = i;
 this.f = f;
 this.s = s;
 }

 @Override
 public String toString() {
 return "MyTestClass{" + "i=" + i + ", s=" + s + ", f=" + f + '}';
 }

 }

 try (ObjectOutputStream os = new ObjectOutputStream(new FileOutputStream(fileName));) {

 os.writeObject(new MyTestClass(1, "Это первый объект", 0.1f));
 os.writeObject(new MyTestClass(2, "Это второй объект", 0.2f));
 os.writeObject(new MyTestClass(3, "Это третий объект", 0.3f));

 } catch (IOException e) {
 System.err.println(e.fillInStackTrace());
 }

 try (ObjectInputStream is = new ObjectInputStream(new FileInputStream(fileName))) {

 System.out.println(is.readObject());
 System.out.println(is.readObject());
 System.out.println(is.readObject());

 } catch (IOException e) {
 System.err.println(e.fillInStackTrace());
 }
 catch(ClassNotFoundException n){
 System.err.println(n.fillInStackTrace());
 }

 }
}