x = 0;           // global scope
y = 1;
z = 2;
{
   x = 3;        // local scope
   {
      y = 4;     // nested local scope
      x + y + z;
   }
}



In Java, local variable cannot hide other local variables,
but local variable can hide static class variables.
Also, Java does not allow variables in the global
scope (only class definitions).


{
   static x = 0;    // local (class) scope
   static y = 1;
   static z = 2;
   {
      x = 3;        // nested local scope
      {
         y = 4;     // nested local scope
         x + y + z;
      }
   }
}