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Expert:jagan
what is a singleton class? why and where we used and give me one example |
| Answers |
hai friend this is jagadhish
A singleton is a class that can be instantiated only one time in JVM pet class loader.Repeated calls always return the same instance.Ensures that a class has only one instance,and provide a global point of access.it can be an issue if singleton class gets loaded by multiple class loaders.
EXAMPLE FOR THIS SINGLETON JAVA CLASS
public class OnlyOne{
private static OnlyOne one=new OnlyOne();
private OnlyOne{//private constructor.This class cannot be instantiated from outside.
..................
}
public static OnlyOne getInstance(){
return one;
}
}
To use it:
//No matter how many times you get the same instance of the object
OnlyOne myOne=OnlyOne.getInstance();
Thank you friend
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