JUC-CopyOnWriteArrayList(测试JUC安全类型的集合)
JUC是java的并发包下的内容,里面有一个方法数组:CopyOnWriteArrayList,是线程安全的List
import java.util.Scanner; public class Main { public static void main(String[] args) { CopyOnWriteArrayListlist=new CopyOnWriteArrayList ();//集合都加泛型用来约束 for (int i=0;i<10000 ;i++ ){ new Thread(()->{ list.add(Thread.currentThread.getName()); }).start(); } try { Thread .sleep(1000); } catch(InterruptedException e) { System.out.println("no"); } System.out.println(list.size());//打印数组长度 } }