输出的结果是?
publicclass A {
static{
System.out.println("A");
}
public A(){
System.out.println("a");
}
publicstaticvoid sys() {
System.out.println("--aaa---");
}
}
publicclass B extends A{
static{
System.out.println("B");
}
public B(){
System.out.println("b");
}
}
publicclass Test {
publicstaticvoid main(String[] args) {
A a = new A();
a = new B();
}
}