问：写出下面程序片段的运行结果？

        class Father {
            {
                System.out.println("FB0 ......");
            }

            static {
                System.out.println("FSB0 ......");
                //d\a无法在此打印，执行在此时d\a还位初始化
            }

            static int a = 1;

            static {
                System.out.println("FSB1 a:" + a);
                //d无法在此打印，执行在此时d还位初始化
            }

            int b = 1;

            static {
                a++;
                System.out.println("FSB2 a:" + a);
                //d无法在此打印，执行在此时d还位初始化
            }

            final static int c = 1;

            static {
                System.out.println("FSB3 c:" + c);
                //d无法在此打印，执行在此时d还位初始化
            }

            public Father() {
                a++;
                b++;
                System.out.println("F CONSTTRUCTOR a:" + a + ", b:" + b + ", c:" + c + ", d:" + d);
            }

            {
                a++;
                b++;
                System.out.println("FB4 a:" + a + ", b:" + b + ", c:" + c);
                //d无法在此打印，执行在此时d还位初始化
            }

            final int d = 1;

            public void func1() {
                a++;
                b++;
                System.out.println("F func1 a:" + a + ", b:" + b + ", c:" + c + ", d:" + d);
            }

            public static void func2() {
                a++;
                System.out.println("F func2 a:" + a + ", c:" + c);
            }
        }
        class Child extends Father {
            {
                System.out.println("CB0 ......");
            }

            static {
                System.out.println("CSB0 ......");
                //d\a无法在此打印，执行在此时d\a还位初始化
            }

            static int a = 1;

            static {
                System.out.println("CSB1 a:" + a);
                //d无法在此打印，执行在此时d还位初始化
            }

            int b = 1;

            static {
                a++;
                System.out.println("CSB2 a:" + a); //
                // d无法在此打印，执行在此时d还位初始化
            }

            final static int c = 1;

            static {
                System.out.println("CSB3 c:" + c);
                //d无法在此打印，执行在此时d还位初始化
            }

            public Child() {
                a++;
                b++;
                System.out.println("C CONSTTRUCTOR a:" + a + ", b:" + b + ", c:" + c + ", d:" + d);
            }

            {
                a++;
                b++;
                System.out.println("CB4 a:" + a + ", b:" + b + ", c:" + c);
                //d无法在此打印，执行在此时d还位初始化
            }

            final int d = 1;

            public void func1() {
                a++;
                b++;
                System.out.println("C func1 a:" + a + ", b:" + b + ", c:" + c + ", d:" + d);
            }

            public static void func2() {
                a++;
                System.out.println("C func2 a:" + a + ", c:" + c);
            }

            public static class BBQ {
                static {
                    System.out.println("BBQ");
                }
            }
        }
        public class Demo {
            public static void main(String[] args) {
              System.out.println("new Child3.BBQ():");
              Child3.BBQ bbq = new Child3.BBQ();

              System.out.println("Father3.func2():");
              Father3.func2();

              System.out.println("Child3.func2():");
              Child3.func2();

              System.out.println("new Child3():");
              Father3 father = new Child3();

              System.out.println("father.func1():");
              father.func1();
            }
        }

答：此题考察类实例化初始化流程，所得结果如下：

new Child3.BBQ():
BBQ

Father3.func2():
FSB0 ......
FSB1 a:1
FSB2 a:2
FSB3 c:1
F func2 a:3, c:1

Child3.func2():
CSB0 ......
CSB1 a:1
CSB2 a:2
CSB3 c:1
C func2 a:3, c:1

new Child3():
FB0 ......
FB4 a:4, b:2, c:1
F CONSTTRUCTOR a:5, b:3, c:1, d:1
CB0 ......
CB4 a:4, b:2, c:1
C CONSTTRUCTOR a:5, b:3, c:1, d:1

father.func1():
C func1 a:6, b:4, c:1, d:1

• 静态初始化块只执行一次；

• 初始化类之后才会执行实例化块；