用java写一个Lambda表达式的示例。提供三个单函数接口：Eatable、Flyable、Addable，编写测试类，运用Lambda表达式进行测试。

// Eatable.java
@FunctionalInterface
public interface Eatable {
    void eat();
}

// Flyable.java
@FunctionalInterface
public interface Flyable {
    void fly(int height);
}

// Addable.java
@FunctionalInterface
public interface Addable {
    int add(int a, int b);
}

// TestLambda.java
public class TestLambda {
    public static void main(String[] args) {
        // 使用Lambda表达式创建Eatable对象
        Eatable eatable = () -> System.out.println("吃饭了！");
        eatable.eat();

        // 使用Lambda表达式创建Flyable对象
        Flyable flyable = height -> System.out.println("飞行高度为：" + height + "米");
        flyable.fly(1000);

        // 使用Lambda表达式创建Addable对象
        Addable addable = (a, b) -> a + b;
        int result = addable.add(3, 5);
        System.out.println("3 + 5 = " + result);
    }
}