正在运行的线程是否有资格进行垃圾收集？

<code class="java">public class TestThread {
    public static void main(String[] s) {
        Thread t = new Thread() {
            public void run() {
                while (true) {
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                    }
                    System.out.println("thread is running...");
                }
            }
        };
        t.start(); // Line A
        t = null; // Line B
        while (true) {
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
            }
            System.gc();
            System.out.println("Executed System.gc()");
        } // The program will run forever until you use ^C to stop it
    }
}</code>