技术类

环境： spring boot:2.6.2 opentracing-spring-jaeger-cloud-starter:3.2.2 jaeger-client:1.6.0 ...

//多线程-非单例 public class Singleton { private static Singleton INSTANCE; public static Singleton getInstance() { if (isNull(INSTANCE)) { try { Thread.sleep(1); INSTANCE = new Singleton(); } catch (InterruptedException e) { e.printStackTrace(); } } return INSTANCE; } public static void main(String[] args) { for (int i = 0; i < 10; i++) { new Thread(() -> System.out.println(Singleton.getInstance().hashCode())).start(); } } }

1.安装 npm cordova npm install -g cordova 全局安装Cordova，可以通过cordova -v 来判断是否成功 2.创建cordova项目 cordova create androidTest io.cordova.hellocordova CordovaApp androidTest 是创建应用程序的目录...