相关疑难解决方法(0)

这个问题发布在某个网站上.我没有在那里找到正确的答案,所以我再次在这里发布.

public class TestThread {
    public static void main(String[] s) {
        // anonymous class extends Thread
        Thread t = new Thread() {
            public void run() {
                // infinite loop
                while (true) {
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                    }
                    // as long as this line printed out, you know it is alive.
                    System.out.println("thread is running...");
                }
            }
        };
        t.start(); // Line A
        t = null; // Line B
        // no more references for Thread t
        // another infinite …

在下面的示例中,新的Thread()没有任何引用.它是否有可能被垃圾收集在它下面？也没有扩展Thread类或实现runnable,我们如何创建一个线程？

public class TestFive {
    private int x;
    public void foo() {
            int current = x;
            x = current + 1;
    }
    public void go() {
            for(int i = 0; i < 5; i++) {
                    new Thread() {
                            public void run() {
                                    foo();
                                    System.out.print(x + ", ");
                            } 
                    }.start();
            } 
    }
    public static void main(String args[]){
            TestFive bb = new TestFive();
            bb.go();
    }
}

我想在广播接收器中维护一个哈希表.如果我理解BroadcastReceiver的生命周期,它可能会被杀死,消灭我的成员变量.从BroadcastReceiver中之前的onReceive运行中检索哈希表的理想策略是什么？