本文提供了一个 Java 中使用 ThreadLocal 和 InheritableThreadLocal 的示例，演示了如何在一个线程中设置值并在同一线程及子线程中获取这些值。
package snippet;
public class Snippet {
public void testThreadLocal() {
final ThreadLocal<String> local = new ThreadLocal<String>();
work(local);
}
public void testInheritableThreadLocal() {
final ThreadLocal<String> local = new InheritableThreadLocal<String>();
work(local);
}
public static void main(String[] args) {
//new Snippet().testThreadLocal();
new Snippet().testInheritableThreadLocal();
}
private void work(final ThreadLocal<String> local) {
local.set("a");
System.out.println(Thread.currentThread() + "," + local.get());
Thread t = new Thread(new Runnable() {
@Override
public void run() {
System.out.println(Thread.currentThread() + "," + local.get());
local.set("b");
System.out.println(Thread.currentThread() + "," + local.get());
}
});
t.start();
try {
t.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(Thread.currentThread() + "," + local.get());
}
}
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