静态数据初始化的一个经典例子

把这个搞懂了 静态数据初始化就清楚了


import java.util.*;
class Bowl {
Bowl(int marker) {
    System.out.println("Bowl(" + marker + ")");
         }
void f1(int marker) {
    System.out.println("f1(" + marker + ")");
        }
     }
class Table {
static Bowl bowl1 = new Bowl(1);
Table() {
    System.out.println("Table()");
    bowl2.f1(1);
        }
void f2(int marker) {
    System.out.println("f2(" + marker + ")");
       }
    static Bowl bowl2 = new Bowl(2);
    }
class Cupboard {
   Bowl bowl3 = new Bowl(3);
   static Bowl bowl4 = new Bowl(4);
   Cupboard() {
     System.out.println("Cupboard()");
     bowl4.f1(2);
       }
   void f3(int marker) {
   System.out.println("f3(" + marker + ")");
         }
    static Bowl bowl5 = new Bowl(5);
    }
public class StaticInitialization {
public static void main(String args[]) {
    System.out.println("Creating new Cupboard() in main");
    new Cupboard();
    System.out.println("Creating new Cupboard() in main");
    new Cupboard();
    table.f2(1);
    cupboard.f3(1);
       }
    static Table table = new Table();
    static Cupboard cupboard = new Cupboard();}