class SingleTon implements
Serializable {
public static final
SingleTon INSTANCE = new
SingleTon();
private
SingleTon() {
}
String name;
public
String getName() {
return name;
}
public void
setName(String name) {
this.name =
name;
}
private
Object readResolve() { //To Maintain
Single Instance even in de-serialization
return INSTANCE;
}
}
public class OldSingleTone
{
public static void
main(String... args) {
SingleTon single =
SingleTon.INSTANCE;
single.setName("BNP ");
System.out.println(single.getName());
}
}
------------------------------------------------------------------------------------------------------------------------------------------------------------
In Java 1.5
enum SingleTon {
INSTANCE;
String name;
public
String getName() {
return name;
}
public void
setName(String name) {
this.name =
name;
}
}
public class
OldSingleTone {
public static void
main(String... args) {
SingleTon single =
SingleTon.INSTANCE;
single.setName("BNP ");
System.out.println(single.getName());
}
}
------------------------------------------------------------------------------------------
If you want a SingleTon class as
Serializable you need to override readResolve Method but in Enum its too
simple.....
"a
single-element enum type is the best way to implement a singleton."
Note : Enums are inherently
Serializable... (http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Enum.html)
