}publicstaticvoidmain(String[] args){ILikelike=newILikeImpl(); like.lambda();Likelike2=newLike(); like2.lambda();// 3.匿名内部类newILike() {@Overridepublicvoidlambda(){ System.out.println("I like lambda3"); } }.lambda();// 4.lambda表达式like = () -> { System.out.println("I ...
impl.start();// 2. 实现Runnable接口// 对于有 @FunctionalInterface 的类 or 接口,我们可以使用lambda表达式来简化,当然// 没有这个注解也可以,但是一定要符合函数式编程的规范// 1. 只能有1个待实现的方法// 2. 允许有默认方法// 3. 只能是接口// @FunctionalInterface 可有可无,但是为了规范建议写上,...
*/publicclassTheWayOfUsingRunnable{publicstaticvoidmain(String[]args){//1)lambda表达式形式传递给线程构造器Runnable runnable1=()->{System.out.println("我是使用lambda表达式实现的Runnable对象实现 version1");};Thread thread1=newThread(runnable1);thread1.start();Thread thread1_1=newThread(()->{Syst...
在实现Callable接口的子类中,有几个比较重要的类,如下图所示。 分别是:Executors类中的静态内部类:PrivilegedCallable、PrivilegedCallableUsingCurrentClassLoader、RunnableAdapter和Task类下的TaskCallable。 2.实现Callable接口的重要类分析 接下来,分析的类主要有:PrivilegedCallable、PrivilegedCallableUsingCurrentClassLoader、...
一、Java 线程创建、同步和通信 二、多线程进阶JUC:Lock锁、集合类的安全性分析、Callable接口和常用辅助类 之前写过Java 线程的创建、同步和通信。这篇文章在此基础之上进一步梳理多线程的一些用法和简单原理。 JUC 是 Java 中 java.util.concurrent 工具包的简称。
1. JavaCallableandFutureInterfaces 1.1. Callable InJava concurrency,Callablerepresents a task that returns a result.Executorscan run callable tasks – concurrently. SinceJava 8, it is afunctional interfaceand can therefore be used as the assignment target for alambda expressionormethod reference. ...
Anonymous functions that you write using the lambda keyword The constructors of your custom classes Instance, class, and static methods Instances of classes that implement the .__call__() method Closures that you return from your functions Generator functions that you define using the yield keyword...
(ArrayList.java:859) at java.util.AbstractCollection.toString(AbstractCollection.java:461) at java.lang.String.valueOf(String.java:2994) at java.io.PrintStream.println(PrintStream.java:821) at safe_list.Demo1_ArrayList.lambda$main$0(Demo1_ArrayList.java:17) at java.lang.Thread.run(Thread.java:...
学习java的第三十九天,Callable多线程接口、静态代理、lambda表达式、线程状态、线程停止、线程休眠、线程强制执行的基础认知 一、Callable多线程接口 实现Callable接口,需要返回值类型 重写call方法,需要抛出异常 创建目标对象 创建执行服务:ExecutorService ser = Executors.newFixedThreadPool(线程数量:1);...
1. Using Lambda Expression Callable<String> task = () -> { System.out.println("Executing Task-1"); return "Success"; }; 2. Using Method Reference Suppose we have a class. class Task { public static int count() { int i = 1; for(; i < 5; i++) { System.out.println(i);...