执行“m1=null;m2=空;“？

执行后，我感到困惑。有多少对象符合垃圾回收的条件？m1 = null;m2 = null;

public class MyTest {
    MyTest m;

    void show() {
        System.out.println("Hello this is show method.");
    }

    public static void main(String args[]) {
        MyTest m1 = new MyTest();
        MyTest m2 = new MyTest();
        MyTest m3 = new MyTest();
        m1.m = m2;
        m2.m = m3;
        m3.m = m1;
        m1 = null;
        m2 = null;
        // Question here: How many objects will be eligible for garbage collection?
    }
}