sostituire due cicli for innestati con Java 8 API

Question

ho il seguente frammento e mi chiedo se e come sia possibile sostituirlo con Streams/Java 8 API

for (State state : states) { 
    for (City city : cities) { 
     if (state.containsPoint(city.getLocation())) { 
      System.out.printf("%30s is part of %-30s\n", 
        city.getName(), state.getName()); 
     } 
    } 
} 

Answer 1

sarà qualcosa di simile:

// first loop 
states.forEach(state -> { 
    // second loop for filtered elements 
    cities.stream().filter(city -> state.containsPoint(city.getLocation())).forEach(city -> { 
     System.out.printf("%30s is part of %-30s\n", city.getName(), state.getName()); 
    }); 
});