ThreadLocalTest
public class ThreadLocalTest {
public static void main(String[] args) {
ThreadLocal threadLoal_1 = new ThreadLocal();
new Thread(()->{
threadLoal_1.set("hello t1");
System.out.println(Thread.currentThread().getName()+":"+threadLoal_1.get());
},"t1").start();
new Thread(()->{
threadLoal_1.set("hello t2");
System.out.println(Thread.currentThread().getName()+":"+threadLoal_1.get());
},"t1").start();
}
}
控制台输出:
t1:hello t1
t1:hello t2
ThreadLocal#get()
public T get() {
Thread t = Thread.currentThread();
ThreadLocalMap map = getMap(t);
if (map != null) {
ThreadLocalMap.Entry e = map.getEntry(this);
if (e != null) {
@SuppressWarnings("unchecked")
T result = (T)e.value;
return result;
}
}
return setInitialValue();
}
图解
