Question

I know that an initialization block runs after the call to ‘super()’ in a constructor. However, when looking through some code this morning, I found the following:

public class SimpleListLocalsAnalysis extends BackwardFlowAnalysis
    FlowSet emptySet;

    public SimpleLiveLocalsAnalysis(UnitGraph graph) {
        super(graph);

        {
            Chain locals = g.getBody().getLocals();
            FlowUniverse localUniverse = new FlowUniverse(locals.toArray());
            emptySet = new ArrayPackedSet(localUniverse);
        }

        doAnalysis();
    }
...
}

The above code shows some initialisation going on within an initialisation block just after ‘super(graph)’ invocation. What’s the purpose of placing the code in an initialisation block within a constructor, as surely it runs anyway after the call to super. Am I missing something here?

Answer 1

Its not initilization block, its simple block

just like

public void foo(){

  {
      //some code
  }
}

Purpose:

You can have restricted scope