Java优学网Lambda表达式入门解析：告别匿名内部类，轻松实现函数式编程

Runnable task = new Runnable() {

@Override
public void run() {
    System.out.println("Hello World");
}

};

// 传统方式 public List filterByAge(List users, int age) {

List<User> result = new ArrayList<>();
for (User user : users) {
    if (user.getAge() > age) {
        result.add(user);
    }
}
return result;

}