temp_class.java

package temp_package;

import java.util.*;
import java.io.*;
// ñìîòðÿùèé çà îáúåêòîì, êîòîðûé áóäåò èçìåíÿòüñÿ
// îáúåêò, êîòîðûé áóäåò óâåäîìëåí îá âîçìîæíûõ èçìåíåíèÿõ

// êëàññ êîòîðûé ñîäåðæèò èíòåðôåéñ Observer(íàáëþäàòåëü)
class Watcher implements Observer{
	String name="";
	Watcher(String name){
		this.name=name;
	}
	public void update(Observable arg0, Object arg1) {
		System.out.println(name+"/Watcher, âûçâàí update:"+arg1);
	}
}
// êëàññ êîòîðûé ÿâëÿåòñÿ ðàñøèðåíèåì êëàññà OBservable (íàáëþäàåìûé)
class Watched extends Observable{
	private String name="";
	Watched(String name){
		this.name=name;
	}
	void ring(String parameter){
		this.setChanged();// çàôèêñèðîâàòü èçìåíåíèÿ â îáúåêòå
		this.notifyObservers(parameter);// âûçâàòü âñåõ Observers, êîòîðûå çàðåãåñòðèðîâàíû äëÿ äàííîãî îáúåêòà
	}
}
class my_class implements Serializable{
	String s;
	int i;
	float f;
	my_class(){
		this.s=new String("temp string");
		this.i=50;
		this.f=100;
	}
	my_class(String s,int i,float f){
		this.s=s;
		this.i=i;
		this.f=f;
	}
	public String toString(){
		String s="";
		s="i: "+i+" f:"+f+"  s:"+s;
		return s;
	}
}
class sample_Serialization{
	my_class temp_data1=new my_class();
	my_class temp_data2=new my_class();
	// óïàêîâêà îáúåêòà êëàññà my_class implements Serializable â ôàéë
	public boolean pack(my_class object_for_pack,String filename){
		try{
			// ïîòîê äëÿ çàïèñè â ôàéë
			FileOutputStream fos=new FileOutputStream(filename);
			// îáåðòêà äëÿ çàïèñè îáúåêòà
			ObjectOutputStream oos=new ObjectOutputStream(fos);
			// çàïèñü îáúåêòà
			oos.writeObject(object_for_pack);
			oos.flush();
			oos.close();
			fos.close();
			return true;
		}
		catch(Exception e){
			System.out.println("Error in save object to "+filename);
			return false;
		}
	}
	// ðàñïàêîâêà îáúåêòà êëàññà my_class implements Serializable èç ôàéëà
	public my_class unpack(String filename){
		try{
			// ïîòîê äëÿ ÷òåíèÿ èç ôàéëà
			FileInputStream fis=new FileInputStream(filename);
			// îáåðòêà äëÿ ÷òåíèÿ èç ôàéëà
			ObjectInputStream ois=new ObjectInputStream(fis);
			// ÷òåíèå îáúåêòà èç ôàéëà
			return (my_class)ois.readObject();
		}
		catch(Exception e){
			System.out.println("Error in read object from "+filename);
			return null;
		}
	}
}
public class temp_class {
	public static void main(String args[]){
		Watcher master1=new Watcher("master1");
		Watcher master2=new Watcher("master2");
		Watched slave1=new Watched("slave1");
		Watched slave2=new Watched("slave2");
		slave1.addObserver(master1);// äîáàâëÿåì íàáëþäàòåëÿ äëÿ slave1 - master1
		slave1.addObserver(master2);// äîáàâëÿåì íàáëþäàòåëÿ äëÿ slave1 - master2
		
		slave2.addObserver(master2);// äîáàâëÿåì íàáëþäàòåëÿ äëÿ slave2 - master2
		slave1.ring("RING SLAVE1");
		slave2.ring("ring slave2");
		//-------------------
	    sample_Serialization temp=new sample_Serialization();
	    my_class temp_my_class_1=new my_class();
	    temp.pack(temp_my_class_1, "c:\\pack");
	    System.out.println("original:"+temp_my_class_1);
	    System.out.println("readable:"+temp.unpack("c:\\pack"));
	}
}