Mã:
import java.util.function.Consumer;
import java.util.function.BiConsumer; 


      Consumer<Integer> bi1 = new Consumer<Integer>() {
         @Override
         public void accept(Integer i) {
            System.out.println("Key: " + i);
         }
      };
      
      
      BiConsumer<Integer, String> bi2 = new BiConsumer<Integer, String>() {
         @Override
         public void accept(Integer key, String value) {
            System.out.println("Key: " + key + " --- Value: " + value);
         }
      };