与大多数其它函数式接口不同,Consumer有望通过副作用进行操作 @FunctionalInterfacepublicinterfaceConsumer<T> {voidaccept(T t); } TheConsumer'sfunctional method isaccept(Object). It can be used as the assignment target for a lambda e
* * This is a functional interface * whose functional method is {@link #accept(Object)}. * * @param <T> the type of the input to the operation * * @since 1.8 */ @FunctionalInterface public interface Consumer<T> { /** * Performs this operation on the given argument. * * @param...
since any implementation of theinterfacewill have an implementation from {@code java.lang.Object} or elsewhere. Note that instances of functional interfaces can be created with lambda expressions, method references, or constructor references. 该注释说了,一个函数式接口应该只有一个抽象方法,对于default ...
@FunctionalInterface public interface Consumer<T> { void accept(T t); } TheConsumer'sfunctional method isaccept(Object). It can be used as the assignment target for a lambda expression or method reference. Java Consumer example The following example creates a simple consumer. Main.java import j...
@FunctionalInterface publicinterfaceMyFunctionInterface{ publicabstractvoidmethod(); } 1. 2. 3. 4. (1)第一种使用方式(实现接口) 重写接口 在testFun方法参数中定义接口 调用时传入它的实现类 publicclassMyFunctionInterfaceImplimplementsMyFunctionInterface{ ...
*/publicabstractvoidmethod();}publicclassDemo{//定义一个方法,参数使用函数式接口MyFunctionalInterfacepublicstaticvoidshow(MyFunctionalInterface myInter){myInter.method();}publicstaticvoidmain(String[]args){//调用show方法,方法的参数是一个接口,所以可以传递接口的实现类对象show(newMyFunctionalInterfaceImpl(...
在上一篇文章(传送门)中介绍了Comparator复合,这次我们来介绍一下其他的复合Lambda表达式。 Consumer复合 Consumer接口中,有一个默认方法andThen,它的入参还是Consumer接口的实例。做完上一个Consumer的操作以后,再做当前Consumer的操作,就像工厂的流水线一样,比如: ...
首先,它还是一个接口,所以必须满足接口最基本的定义。但它是一个特殊的接口:SAM类型的接口(Single Abstract Method)。可以在调用时,使用一个lambda表达式作为参数。 定义要求: YourBatman 2019/09/03 1K0 JDK8新特性--lambda表达式 java8 lambda:编译后,不会产生一个单独的.class字节码文件。对应的字节码会在运行...
//定义一个方法,参数使用函数式接口MyFunctionalInterface publicstaticvoidshow(MyFunctionalInterfacemyInter){ myInter.method(); } publicstaticvoidmain(String[]args) { //调用show方法,方法的参数是一个接口,所以可以传递接口的实现类对象 show(newMyFunctionalInterfaceImpl()); ...
Interface Consumer<T> Type Parameters: T- the type of the input to the operation All Known Subinterfaces: Stream.Builder<T> Functional Interface: This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference. ...