Singelton

Here is an example of a singelton class. Note the private constructor.



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import java.io.*;

class Singelton{
    public int myInt;
    private static Singelton me = new Singelton();

    private  Singelton(){
    }

    public static Singelton getInstance(){
        return me;
    }
}

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Here is a wrapper class that demonstrats that all instances of 
the singelton class are really shared instances of one.
(when all is one and one is all, --wow man thats deep)

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import java.io.*;

class Wrapper{


    public static void main(String[] args){
        System.out.println("class: Wrapper, method: main");
        
        Singelton one = Singelton.getInstance();
        Singelton two = Singelton.getInstance();
        Singelton three = Singelton.getInstance();

        if(one == null)
            System.out.println("oops");
        
        one.myInt = 7;  //yea yea I am not going to make accessors for this example.
        System.out.println("changed one and two is: "+two.myInt );
        System.out.println("changed one and three is: "+three.myInt );

    }

}

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here is the tar with these two java files in it.
Singelton