20. 下面程序的运行结果是什么()
- class HelloA {
- public HelloA() {
- System.out.println("HelloA");
- }
-
- { System.out.println("I'm A class"); }
-
- static { System.out.println("static A"); }
- }
- public class HelloB extends HelloA {
- public HelloB() {
- System.out.println("HelloB");
- }
-
- { System.out.println("I'm B class"); }
-
- static { System.out.println("static B"); }
-
- public static void main(String[] args) {
- new HelloB();
- }
- }
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