求下面java代码的输出。and WHY!!

Question

class T {
public static void main(String[] args) {
System.out.println("T的main方法");
}

public void print() {
    System.out.println("T的print方法");
}

}

public class A extends T {

public static void main(String[] args) {

    System.out.println("A的main方法");

    new Thread(new Runnable() {

        public void run() {
            System.out.println("haoa");
        }
    }).start();

    T.main(null);

    T t = new A();
    t.print();

}

}

Answer 1

The AtomicInteger class has a number of uses, but one is a drop-in replacement for an atomic counter. Before Java 5, we had to write classes with access to the counter variable in synchronized blocks......
答案就在这里：Synchronization under the hood, and why Java 5 improves it
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