标签:img false cep package pre void demo exception 一个
package thread.test; public class ThreadLocalDemo { /** * ThreadLocal变量,每个线程都有一个副本,互不干扰 */ private static final ThreadLocal<String> THREAD_LOCAL = new ThreadLocal<>(); public static void main(String[] args) throws Exception { new ThreadLocalDemo().threadLocalTest(); } public void threadLocalTest() throws Exception { // 主线程设置值 THREAD_LOCAL.set("1"); String v = THREAD_LOCAL.get(); System.out.println("Thread-0线程执行之前," + Thread.currentThread().getName() + "线程取到的值:" + v); new Thread(new Runnable() { @Override public void run() { String v = THREAD_LOCAL.get(); System.out.println(Thread.currentThread().getName() + "线程取到的值:" + v); // 设置 threadLocal(这也说明了每个线程都有一个threadLocal) THREAD_LOCAL.set("2"); v = THREAD_LOCAL.get(); System.out.println("重新设置之后," + Thread.currentThread().getName() + "线程取到的值为:" + v); System.out.println(Thread.currentThread().getName() + "线程执行结束"); } }).start(); // 等待所有线程执行结束 Thread.sleep(3000L); // main线程重新取,取到的是自己线程私有的本地线程私有变量 v = THREAD_LOCAL.get(); System.out.println("Thread-0线程执行之后," + Thread.currentThread().getName() + "线程取到的值:" + v); } }
标签:img false cep package pre void demo exception 一个
原文地址:https://www.cnblogs.com/dashenaichicha/p/12716766.html