orderofinitialization.java

来自「think in java 最新版本的源码」· Java 代码 · 共 36 行

//: initialization/OrderOfInitialization.java
// Demonstrates initialization order.
import static net.mindview.util.Print.*;

// When the constructor is called to create a
// Window object, you'll see a message:
class Window {
  Window(int marker) { print("Window(" + marker + ")"); }
}

class House {
  Window w1 = new Window(1); // Before constructor
  House() {
    // Show that we're in the constructor:
    print("House()");
    w3 = new Window(33); // Reinitialize w3
  }
  Window w2 = new Window(2); // After constructor
  void f() { print("f()"); }
  Window w3 = new Window(3); // At end
}

public class OrderOfInitialization {
  public static void main(String[] args) {
    House h = new House();
    h.f(); // Shows that construction is done
  }
} /* Output:
Window(1)
Window(2)
Window(3)
House()
Window(33)
f()
*///:~