java中初始化顺序--java核心技术

pustian 2010-04-19 11:34:50



package volume1.ch04.CalendatTest;



import java.util.*;



public class CalendarTest{

    public static void main(String[] args){

        //construct date

        GregorianCalendar d = new GregorianCalendar();

        int today = d.get(Calendar.DAY_OF_MONTH);

        int month = d.get(Calendar.MONTH);

        

        //set start day of month

        d.set(Calendar.DAY_OF_MONTH, 1);

        

        int weekday = d.get(Calendar.DAY_OF_WEEK);

        

        System.out.println("Sun Mon Tue Wed Thu Fri Sat");

        

        for(int i =Calendar.SUNDAY; i<weekday; i++){

             System.out.print("    ");

        }

        

        do{

            //print day

            int day = d.get(Calendar.DAY_OF_MONTH);



            if(day<10)System.out.print(" ");

            System.out.print(day);

            //mark current day

            if(day == today )

                System.out.print("* ");

            else

                System.out.print("  ");

            //start a new line after every Sat

            if(weekday == Calendar.SATURDAY)

                System.out.println();

            //advance d to the next day

            d.add(Calendar.DAY_OF_MONTH, 1);

            weekday = d.get(Calendar.DAY_OF_WEEK);

        }while(d.get(Calendar.MONTH) == month);

        

        //print final end of line if neccessary

        if(weekday != Calendar.SUNDAY)

            System.out.println();

        

    }

}

按书上将实现对象 block 初始化后static block
执行结果
static initialize block
object initialize block
object initialize block
object initialize block
name:carl Cracker salary:150000.0 id1
name:Employee#2 salary:60000.0 id2
name:null salary:0.0 id3
感觉书上写错了，还是我理解错了
但是好几个版本都是这样

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