Hi, I've written a simple singleton pattern along with a attribute allows for:

/**
*
*@@ singelton
**/
public class A
{
private String m_csDefaultValue = null;

public A() {}
public A(String csDefaultValue)
{
if (null != this.m_csDefaultValue)
this.m_csDefaultValue = csDefaultValue;
}

public String getDefaultValue() { return this.m_csDefaultValue }
public void setDefaultValue(String csValue) { this.m_csDefaultValue = csValue; }
}


new A("hello world").getDefaultValue(); // hello world
new A().getDefaultValue(); // hello world
new A().setDefaultValue("kalle karlsson");

A a = new A();
a.getDefaultValue(); // kalle karlsson

I admit this is to tamper with the singelton pattern a bit but I think it is a more modern version of it and allows for configuration based singeltons instead of hardcoded ones. An yes of course it would be quite possible to allow for a specific method to be marked as singelton returns...

If interresting would a network based (jgroups) one of interrest?

Regards,
Mario