ThreadLocal示例

@SuppressWarnings("unchecked")
public class ThreadLocalComplexDemo {
	
	@SuppressWarnings("rawtypes")
	private final static ThreadLocal threadLocal = new ThreadLocal();
	
	private static Random random = new Random();

	public static void main(String[] args) throws InterruptedException {
		Thread t1 = new Thread(() -> {
			threadLocal.set("Thread-T1");
			try {
				Thread.sleep(random.nextInt(1000));
				System.out.println(Thread.currentThread().getName() + " " + threadLocal.get());
			} catch (Exception e) {
				e.printStackTrace();
			}
		});
		
		Thread t2 = new Thread(() -> {
			threadLocal.set("Thread-T2");
			try {
				Thread.sleep(random.nextInt(1000));
				System.out.println(Thread.currentThread().getName() + " " + threadLocal.get());
			} catch (Exception e) {
				e.printStackTrace();
			}
		});
		
		t1.start();
		t2.start();
		t1.join();
		t2.join();
		
		System.out.println(Thread.currentThread().getName() + " " + threadLocal.get());
	}
}

运行结果：

Thread-0 Thread-T1
Thread-1 Thread-T2
main null