Explain the difference between the Consumer and Supplier interfaces in the context of working with streams or functional interfaces.

In Java, interfaces Consumer and Supplier are functional interfaces used for working with lambda expressions and streams.

• Consumer<T> accepts an object of type T and returns nothing. It is used when you need to perform an action with the given object, such as printing it or changing its state.

  Consumer<String> printer = s -> System.out.println(s);
  printer.accept("Hello"); // prints Hello
  

• Supplier<T> does not accept arguments but returns an object of type T. It is used for generating or supplying values.

  Supplier<Double> randomSupplier = () -> Math.random();
  double value = randomSupplier.get();
  

Thus, Consumer is a "consumer" of data, and Supplier is a "supplier" of data.