子类继承父类，初始化以及方法调用顺序

// 父类

public class ParentA {
    private static int i=5;
    private int j;
    static {
        System.out.println("static A");
        System.out.println("ParentA static i = "+i);
    }

    { System.out.println("I'm A class");
        System.out.println("ParentA static  = "+j);
    }

    public ParentA() {
        System.out.println("HelloA");
    }

    public void function() {
        System.out.println("A function");
    }
}

public class SubClassB extends ParentA {
    static { System.out.println("static B"); }

    { System.out.println("I'm B class"); }

    public SubClassB() {
        System.out.println("HelloB");
    }

    public void function() {
        System.out.println("B function");
    }

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        new SubClassB().function();
    }

}
输出结果：

static A
ParentA static i = 5
static B
I'm A class
ParentA static j = 0
HelloA
I'm B class
HelloB
B function

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