1、案例演示 public class ThreadDemo04 {public static void main(String[] args) {Map<String, String> map = new HashMap<>();for (int i = 0; i < 30; i++) {new Thread(()->{//向集合中添加内容map.put(UUID.randomUUID().toString().substring(0, 8), "");//从集合中获取内容System....
* 演示HashMap的线程不安全问题及解决方案 */publicclassThreadDemo4{publicstaticvoidmain(String[] args) {//Map<String,Object> map = new HashMap<>();//解决方法1:Collections//Map<String,Object> map = Collections.synchronizedMap(new HashMap<>());//解决方法2:ConcurrentHashMapMap<String,Object> ...
二、HashMap 1、案例演示 public class ThreadDemo04 {public static void main(String[] args) {Map<String, String> map = new HashMap<>();for (int i = 0; i < 30; i++) {new Thread(()->{//向集合中添加内容map.put(UUID.randomUUID().toString().substring(0, 8), "");//从集合中...