andThen(Function after):作用是将两个Function组合。首先执行当前函数,再执行andThen函数,并将当前函数的结果作为参数传递给andThen函数。 compose(Function before):同理,将两个Function组合,将先执行compose函数,再执行当前函数,并将compose函数的结果作为参数传递给当前函数。 identity(): 返回一个执行恒等转换的函数...
3.`Predicate`有默认实现的逻辑判断方法## Function接口### 基本使用见 [Java8 Function接口(apply compose andThen)](https://www.cnblogs.com/greatLong/articles/11975684.html)### 链式调用进阶使用首先定义接口`ProcessUnit`继承`Function`接口并提供`apply`方法的默认实现:> ProcessUnit.java public interface ...
java.util.function.Consumer 接口则正好与Supplier接口相反,它不是生产一个数据,而是消费一个数据,其数据类型由泛型决定。 Consumer 接口中包含抽象方法void accept(T t) ,意为消费一个指定泛型的数据。 代码案例Consumer 代码语言:javascript 复制 publicclassDemo01Consumer{/** 定义一个方法 方法的参数传递一个字符...
代码案例Function_andThen Function接口中的默认方法andThen:用来进行组合操作 publicclassDemo02Function_andThen{/** 定义一个方法 参数串一个字符串类型的整数 参数再传递两个Function接口 一个泛型使用Function<String,Integer> 一个泛型使用Function<Integer,String> */publicstaticvoidchange(String s, Function<Strin...
Java documentation forjava.util.function.Predicate.and(java.util.function.Predicate<? super T>). Portions of this page are modifications based on work created and shared by theAndroid Open Source Projectand used according to terms described in theCreative Commons 2.5 Attribution License. ...
Java8的Predicate,让代码更简洁 在我们的代码中,经常会编写是否为真的代码,比如用户名是否存在,客户是否存在等。类似如下代码: public boolean exist(Long userId){ ... return false; } 这样做已经很棒了。但你需要了解一个java8的Predicate。通过Predicate可以让你的代码更加的简洁。学习下Predicate吧。
consumer, supplier etc. The return type of a Lambda function (introduced in JDK 1.8) is a also functional interface.The Functional Interface PREDICATE is defined in the java.util.function package. It improves manageability of code, helps in unit-testing them separately, and contain some methods ...
Methods injava.util.functionwith parameters of typePredicate Modifier and TypeMethod and Description defaultPredicate<T>Predicate.and(Predicate<? superT> other) Returns a composed predicate that represents a short-circuiting logical AND of this predicate and another. ...
java.util.function Interface Predicate<T> Type Parameters: T- the type of the input to the predicate Functional Interface: This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference. ...
Java documentation for java.util.function.Predicate.negate(). Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License. Applies to 產品版本 .NET for Android .NET...