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); } };