ThreadLocal、TimerTask+Timer（2021-12-16）

package demo;

class Message{
	private String info;
	
	public void setInfo(String info) {
		this.info = info;
	}
	public String getInfo() {
		return info;
	}
}

class Channel{		//消息的发送通道
	private Channel() {};
	//ThreadLocal类，通过给每个线程分配自己的数据空间，可以避免并发线程使用同一资源时发生覆盖
	private static final ThreadLocal<Message> THREADLOCAL = new ThreadLocal<Message>();	
	
	public static void setMessage(Message msg) {
		THREADLOCAL.set(msg);
	}
	public static void send() {
		System.out.println("["+Thread.currentThread().getName()+"]"+THREADLOCAL.get().getInfo());
	}
}

public class Demo {

	public static void main(String[] args) {
		new Thread(()->{
			Message msg =new Message();
			msg.setInfo("A的消息");
			Channel.setMessage(msg);
			Channel.send();
		},"线程A").start();
		
		new Thread(()->{
			Message msg =new Message();
			msg.setInfo("B的消息");
			Channel.setMessage(msg);
			Channel.send();
		},"线程B").start();
		
		new Thread(()->{
			Message msg =new Message();
			msg.setInfo("C的消息");
			Channel.setMessage(msg);
			Channel.send();
		},"线程C").start();
		
	}

}