关于构造函数
class Tag {
Tag(int marker) {
System.out.println("Tag(" + marker + ")");
}
}
class Card {
Tag t1 = new Tag(1); // Before constructor
Card() {
// Indicate we're in the constructor:
System.out.println("Card()");
t3 = new Tag(33); // Reinitialize t3
}
Tag t2 = new Tag(2); // After constructor
void f() {
System.out.println("f()");
}
Tag t3 = new Tag(3); // At end
}
public class OrderOfInitialization {
public static void main(String[] args) {
Card t = new Card();
t.f(); // Shows that construction is done
}
} ///:~
结果是:
Tag(1)
Tag(2)
Tag(3)
Card()
Tag(33)
f()
这是编程思想中的例子!
Card t=new Card()
这句会调用Card 这个类吗?如果调用的话,为什么要先执行Tag这个构造函数?他们的执行顺序是怎样的?望高手解答,谢谢!