写了一个多线程中有关final和static的例子,遇到问题了。
public class MyThread implements Runnable
{
int i = 0;
int a = 20;
static int b = 20;
static int c = 20;
static int d = 20;
final int finalIntNoStatic = a++;
static int staticInt = b++;
final int finalInt = c++;
static final int STATIC_FINAL_INT = d++;
@Override
public void run()
{
while (i < 10)
{
System.out.println("i=" + i + ",finalIntNoStatic=" + finalIntNoStatic + ",a=" + a
+ ",staticInt=" + staticInt + ",b=" + b + ",finalInt=" + finalInt + ",c=" + c
+ ",STATIC_FINAL_INT=" + STATIC_FINAL_INT + ",d=" + d);
i++;
}
}
}
public class MultiThread
{
public static void main(String[] args)
{
for (int i = 0; i < 5; i++)
{
Thread aThread=new Thread(new MyThread());
aThread.start();
}
System.out.println("Run in main thread");
}
}
最后打印结果为:
i=0,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=20,c=25,STATIC_FINAL_INT=20,d=21
Run in main thread
i=0,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=23,c=25,STATIC_FINAL_INT=20,d=21
i=1,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=23,c=25,STATIC_FINAL_INT=20,d=21
i=0,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=21,c=25,STATIC_FINAL_INT=20,d=21
i=2,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=23,c=25,STATIC_FINAL_INT=20,d=21
i=0,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=24,c=25,STATIC_FINAL_INT=20,d=21
i=0,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=22,c=25,STATIC_FINAL_INT=20,d=21
i=1,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=20,c=25,STATIC_FINAL_INT=20,d=21
i=1,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=22,c=25,STATIC_FINAL_INT=20,d=21
i=1,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=24,c=25,STATIC_FINAL_INT=20,d=21
i=3,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=23,c=25,STATIC_FINAL_INT=20,d=21
i=1,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=21,c=25,STATIC_FINAL_INT=20,d=21
i=4,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=23,c=25,STATIC_FINAL_INT=20,d=21
i=2,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=24,c=25,STATIC_FINAL_INT=20,d=21
i=2,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=22,c=25,STATIC_FINAL_INT=20,d=21
i=2,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=20,c=25,STATIC_FINAL_INT=20,d=21
i=3,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=22,c=25,STATIC_FINAL_INT=20,d=21
i=3,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=24,c=25,STATIC_FINAL_INT=20,d=21
i=5,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=23,c=25,STATIC_FINAL_INT=20,d=21
i=2,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=21,c=25,STATIC_FINAL_INT=20,d=21
i=6,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=23,c=25,STATIC_FINAL_INT=20,d=21
i=4,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=24,c=25,STATIC_FINAL_INT=20,d=21
i=4,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=22,c=25,STATIC_FINAL_INT=20,d=21
i=3,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=20,c=25,STATIC_FINAL_INT=20,d=21
i=5,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=22,c=25,STATIC_FINAL_INT=20,d=21
i=5,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=24,c=25,STATIC_FINAL_INT=20,d=21
i=7,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=23,c=25,STATIC_FINAL_INT=20,d=21
i=3,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=21,c=25,STATIC_FINAL_INT=20,d=21
i=8,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=23,c=25,STATIC_FINAL_INT=20,d=21
i=6,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=24,c=25,STATIC_FINAL_INT=20,d=21
i=6,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=22,c=25,STATIC_FINAL_INT=20,d=21
i=4,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=20,c=25,STATIC_FINAL_INT=20,d=21
i=7,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=22,c=25,STATIC_FINAL_INT=20,d=21
i=7,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=24,c=25,STATIC_FINAL_INT=20,d=21
i=9,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=23,c=25,STATIC_FINAL_INT=20,d=21
i=4,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=21,c=25,STATIC_FINAL_INT=20,d=21
i=8,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=24,c=25,STATIC_FINAL_INT=20,d=21
i=8,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=22,c=25,STATIC_FINAL_INT=20,d=21
i=5,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=20,c=25,STATIC_FINAL_INT=20,d=21
i=9,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=22,c=25,STATIC_FINAL_INT=20,d=21
i=9,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=24,c=25,STATIC_FINAL_INT=20,d=21
i=5,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=21,c=25,STATIC_FINAL_INT=20,d=21
i=6,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=20,c=25,STATIC_FINAL_INT=20,d=21
i=6,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=21,c=25,STATIC_FINAL_INT=20,d=21
i=7,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=20,c=25,STATIC_FINAL_INT=20,d=21
i=7,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=21,c=25,STATIC_FINAL_INT=20,d=21
i=8,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=20,c=25,STATIC_FINAL_INT=20,d=21
i=8,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=21,c=25,STATIC_FINAL_INT=20,d=21
i=9,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=20,c=25,STATIC_FINAL_INT=20,d=21
i=9,finalIntNoStatic=20,a=21,staticInt=20,b=21,finalInt=21,c=25,STATIC_FINAL_INT=20,d=21
我的问题是为什么c的值一直是25,,编译和运行过程中finalInt和c的赋值顺序是怎样的