详细解释Lambda

@FunctionalInterface
public interface Consumer<T> {

    /**
     * Performs this operation on the given argument.
     *
     * @param t the input argument
     */
    void accept(T t);

Consumer<String> con = ((str)->{
    System.out.println(str);
});

con.accept("consumer");

@FunctionalInterface
public interface Supplier<T> {

    /**
     * Gets a result.
     *
     * @return a result
     */
    T get();
}

Supplier<String> sup = (()->{
    return "1";
});

System.out.println(sup.get());

@FunctionalInterface
public interface Function<T, R> {

    /**
     * Applies this function to the given argument.
     *
     * @param t the function argument
     * @return the function result
     */
    R apply(T t);

Function<String, Integer> fun = ((str)->{
    return Integer.valueOf(str);
});

System.out.println(fun.apply("我是function"));