Initialization and class loading

Bruce Eckel's Thinking in Java Contents | Prev | Next

class loading

Initialization with inheritance

//: Beetle.java
// The full process of initialization.
 
class Insect {
  int i = 9;
  int j;
  Insect() {
    prt("i = " + i + ", j = " + j);
    j = 39;
  }
  static int x1 = 
    prt("static Insect.x1 initialized");
  static int prt(String s) {
    System.out.println(s);
    return 47;
  }
}
 
public class Beetle extends Insect {
  int k = prt("Beetle.k initialized");
  Beetle() {
    prt("k = " + k);
    prt("j = " + j);
  }
  static int x2 =
    prt("static Beetle.x2 initialized");
  static int prt(String s) {
    System.out.println(s);
    return 63;
  }
  public static void main(String[] args) {
    prt("Beetle constructor");
    Beetle b = new Beetle();
  }
} ///:~ 

The output for this program is:

static Insect.x initialized
static Beetle.x initialized
Beetle constructor
i = 9, j = 0
Beetle.k initialized
k = 63
j = 39



Comments

  • There are no comments yet. Be the first to comment!

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Organizations are increasingly gravitating toward mobile-first application development as they assess the need to revamp their application portfolios to support touch computing and mobility. Consumerization has brought higher expectations for application usability along with the mobile devices themselves. Enterprises are increasingly shifting their new application acquisitions and development efforts toward mobile platforms. With this backdrop, it is natural to expect application platform vendors to invest in …

  • The mobile revolution and the need for mobile apps have created an unprecedented set of challenges for IT organizations. This eBook discuss these challenges and how organizations can address them by making their mobile app development processes more efficient and more effective.

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date