java调用公共类

Question

创建两个公共类！让两个类相互调用！

Answer 1

很直接啊。

public class A{
    private B b = new B();
    public void f1(){
       b.f1();
}
}
public class B{
    private A a = new A();
    public void f1(){};
    public void f2(){
    a.f1();
}
}