张恒的博客

定义三个类，关系如下class A {}class B extends A {}class C extends B {}测试三个方法instanceof、isInstance、isAssignableFrom测试代码如下A a = new C();B b = new C();C c = new C();System.out.println(a inst...

public class ATest { static { System.out.println("this is A static"); } { System.out.println("this is A {}"); } public ATest() { System.out.println("thi...