[google-appengine] synchronized data with instances

[José Luis Montesinos González]

I only want to know a question. If I have a class like this:

public class Example
{
    ArrayList<String> vector;

    public Example singleton = new Example();
    
    private Example()
    {
        //Read data from BD and fill the vector. Example vector:  
["foo","voo","faa","vuu","vee"]
    }    

    public synchronized removeElement()
    {
        vector.remove(0);
    }

    public synchronized changeElement()
    {
        vector.set(0,"fii");
    }
}

If there are multiple instances running and one of them executes the method 
removeElement? What happens with the values of the other instance? And if 
one of them executes the method changeElement?

Thanks a lot.

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