public class Ex8_6{
    public static void main(String[] args){
        SellTickets t1=new SellTickets();  
SellTickets t2=new SellTickets();
SellTickets t3=new SellTickets();  
       new Thread(t1).start();      
        new Thread(t2).start();
        new Thread(t3).start();
    }
}
class SellTickets implements Runnable
{
    private int tickets=200;   
    public void run()
    {
        while(tickets>0)
         {
          System.out.println( Thread.currentThread().getName() +
                                            " is selling ticket "+tickets--);
       }
    }
}
为什么运行结果不是三个线程各自售票200？？而出现了一些让人摸不着头脑的数字！请各位高手为新手解答下！无尽感激

线程本来是从200开始减下来！但我的第一个线程执行时出现的数字却是105！我觉得这些数字让我摸不着头脑，而且在结果中根本就见不到大于105的数字

[ 本帖最后由 康之恋 于 2009-9-16 18:02 编辑 ]

Thread-1 is selling ticket 118
Thread-1 is selling ticket 117
Thread-0 is selling ticket 94
Thread-0 is selling ticket 93
Thread-0 is selling ticket 92
Thread-0 is selling ticket 91
Thread-0 is selling ticket 90
Thread-0 is selling ticket 89
Thread-0 is selling ticket 88
Thread-0 is selling ticket 87
Thread-2 is selling ticket 86
Thread-2 is selling ticket 85
Thread-2 is selling ticket 84
Thread-2 is selling ticket 83
Thread-2 is selling ticket 82
Thread-2 is selling ticket 81
Thread-2 is selling ticket 80
Thread-2 is selling ticket 79
Thread-1 is selling ticket 116
Thread-1 is selling ticket 115
Thread-1 is selling ticket 114
Thread-1 is selling ticket 113
Thread-1 is selling ticket 112
Thread-1 is selling ticket 111
Thread-1 is selling ticket 110
Thread-1 is selling ticket 109
Thread-0 is selling ticket 86
Thread-0 is selling ticket 85
Thread-0 is selling ticket 84
Thread-0 is selling ticket 83
Thread-0 is selling ticket 82
Thread-0 is selling ticket 81
Thread-0 is selling ticket 80
Thread-0 is selling ticket 79
Thread-2 is selling ticket 78
Thread-2 is selling ticket 77
Thread-2 is selling ticket 76
Thread-2 is selling ticket 75
Thread-2 is selling ticket 74
Thread-2 is selling ticket 73
Thread-2 is selling ticket 72
Thread-2 is selling ticket 71
Thread-1 is selling ticket 108
Thread-1 is selling ticket 107
Thread-1 is selling ticket 106
Thread-1 is selling ticket 105
Thread-1 is selling ticket 104
Thread-1 is selling ticket 103
Thread-1 is selling ticket 102
Thread-1 is selling ticket 101
Thread-0 is selling ticket 78
Thread-0 is selling ticket 77
Thread-0 is selling ticket 76
Thread-0 is selling ticket 75
Thread-0 is selling ticket 74
Thread-0 is selling ticket 73
Thread-0 is selling ticket 72
Thread-0 is selling ticket 71
Thread-2 is selling ticket 70
Thread-2 is selling ticket 69
Thread-2 is selling ticket 68
Thread-2 is selling ticket 67
Thread-2 is selling ticket 66
Thread-2 is selling ticket 65
Thread-2 is selling ticket 64
Thread-2 is selling ticket 63
Thread-1 is selling ticket 100
Thread-1 is selling ticket 99
Thread-1 is selling ticket 98
Thread-1 is selling ticket 97
Thread-1 is selling ticket 96
Thread-1 is selling ticket 95
Thread-1 is selling ticket 94
Thread-1 is selling ticket 93
Thread-0 is selling ticket 70
Thread-0 is selling ticket 69
Thread-0 is selling ticket 68
Thread-0 is selling ticket 67
Thread-0 is selling ticket 66
Thread-0 is selling ticket 65
Thread-0 is selling ticket 64
Thread-0 is selling ticket 63
Thread-2 is selling ticket 62
Thread-2 is selling ticket 61
Thread-2 is selling ticket 60
Thread-2 is selling ticket 59
Thread-2 is selling ticket 58
Thread-2 is selling ticket 57
Thread-2 is selling ticket 56
Thread-2 is selling ticket 55
Thread-1 is selling ticket 92
Thread-1 is selling ticket 91
Thread-1 is selling ticket 90
Thread-1 is selling ticket 89
Thread-1 is selling ticket 88
Thread-1 is selling ticket 87
Thread-0 is selling ticket 62
Thread-0 is selling ticket 61
Thread-0 is selling ticket 60
Thread-0 is selling ticket 59
Thread-0 is selling ticket 58
Thread-0 is selling ticket 57
Thread-0 is selling ticket 56
Thread-0 is selling ticket 55
Thread-2 is selling ticket 54
Thread-2 is selling ticket 53
Thread-2 is selling ticket 52
Thread-2 is selling ticket 51
Thread-2 is selling ticket 50
Thread-2 is selling ticket 49
Thread-2 is selling ticket 48
Thread-2 is selling ticket 47
Thread-1 is selling ticket 86
Thread-1 is selling ticket 85
Thread-1 is selling ticket 84
Thread-1 is selling ticket 83
Thread-1 is selling ticket 82
Thread-1 is selling ticket 81
Thread-1 is selling ticket 80
Thread-1 is selling ticket 79
Thread-0 is selling ticket 54
Thread-0 is selling ticket 53
Thread-0 is selling ticket 52
Thread-0 is selling ticket 51
Thread-0 is selling ticket 50
Thread-0 is selling ticket 49
Thread-0 is selling ticket 48
Thread-0 is selling ticket 47
Thread-2 is selling ticket 46
Thread-2 is selling ticket 45
Thread-2 is selling ticket 44
Thread-2 is selling ticket 43
Thread-2 is selling ticket 42
Thread-2 is selling ticket 41
Thread-2 is selling ticket 40
Thread-2 is selling ticket 39
Thread-1 is selling ticket 78
Thread-1 is selling ticket 77
Thread-1 is selling ticket 76
Thread-1 is selling ticket 75
Thread-1 is selling ticket 74
Thread-1 is selling ticket 73
Thread-1 is selling ticket 72
Thread-1 is selling ticket 71
Thread-0 is selling ticket 46
Thread-0 is selling ticket 45
Thread-0 is selling ticket 44
Thread-0 is selling ticket 43
Thread-0 is selling ticket 42
Thread-0 is selling ticket 41
Thread-0 is selling ticket 40
Thread-0 is selling ticket 39
Thread-2 is selling ticket 38
Thread-2 is selling ticket 37
Thread-2 is selling ticket 36
Thread-2 is selling ticket 35
Thread-2 is selling ticket 34
Thread-2 is selling ticket 33
Thread-2 is selling ticket 32
Thread-2 is selling ticket 31
Thread-1 is selling ticket 70
Thread-1 is selling ticket 69
Thread-1 is selling ticket 68
Thread-1 is selling ticket 67
Thread-1 is selling ticket 66
Thread-1 is selling ticket 65
Thread-1 is selling ticket 64
Thread-1 is selling ticket 63
Thread-0 is selling ticket 38
Thread-0 is selling ticket 37
Thread-0 is selling ticket 36
Thread-0 is selling ticket 35
Thread-0 is selling ticket 34
Thread-0 is selling ticket 33
Thread-0 is selling ticket 32
Thread-0 is selling ticket 31
Thread-2 is selling ticket 30
Thread-2 is selling ticket 29
Thread-2 is selling ticket 28
Thread-2 is selling ticket 27
Thread-2 is selling ticket 26
Thread-2 is selling ticket 25
Thread-2 is selling ticket 24
Thread-2 is selling ticket 23
Thread-1 is selling ticket 62
Thread-1 is selling ticket 61
Thread-1 is selling ticket 60
Thread-1 is selling ticket 59
Thread-1 is selling ticket 58
Thread-1 is selling ticket 57
Thread-1 is selling ticket 56
Thread-1 is selling ticket 55
Thread-0 is selling ticket 30
Thread-0 is selling ticket 29
Thread-0 is selling ticket 28
Thread-0 is selling ticket 27
Thread-0 is selling ticket 26
Thread-0 is selling ticket 25
Thread-0 is selling ticket 24
Thread-0 is selling ticket 23
Thread-2 is selling ticket 22
Thread-2 is selling ticket 21
Thread-2 is selling ticket 20
Thread-2 is selling ticket 19
Thread-2 is selling ticket 18
Thread-2 is selling ticket 17
Thread-2 is selling ticket 16
Thread-2 is selling ticket 15
Thread-1 is selling ticket 54
Thread-1 is selling ticket 53
Thread-1 is selling ticket 52
Thread-1 is selling ticket 51
Thread-1 is selling ticket 50
Thread-1 is selling ticket 49
Thread-1 is selling ticket 48
Thread-1 is selling ticket 47
Thread-0 is selling ticket 22
Thread-0 is selling ticket 21
Thread-0 is selling ticket 20
Thread-0 is selling ticket 19
Thread-0 is selling ticket 18
Thread-0 is selling ticket 17
Thread-0 is selling ticket 16
Thread-0 is selling ticket 15
Thread-2 is selling ticket 14
Thread-2 is selling ticket 13
Thread-2 is selling ticket 12
Thread-2 is selling ticket 11
Thread-2 is selling ticket 10
Thread-2 is selling ticket 9
Thread-2 is selling ticket 8
Thread-2 is selling ticket 7
Thread-1 is selling ticket 46
Thread-1 is selling ticket 45
Thread-1 is selling ticket 44
Thread-1 is selling ticket 43
Thread-1 is selling ticket 42
Thread-1 is selling ticket 41
Thread-1 is selling ticket 40
Thread-1 is selling ticket 39
Thread-0 is selling ticket 14
Thread-0 is selling ticket 13
Thread-0 is selling ticket 12
Thread-0 is selling ticket 11
Thread-0 is selling ticket 10
Thread-0 is selling ticket 9
Thread-0 is selling ticket 8
Thread-0 is selling ticket 7
Thread-2 is selling ticket 6
Thread-2 is selling ticket 5
Thread-2 is selling ticket 4
Thread-2 is selling ticket 3
Thread-2 is selling ticket 2
Thread-2 is selling ticket 1
Thread-1 is selling ticket 38
Thread-1 is selling ticket 37
Thread-1 is selling ticket 36
Thread-1 is selling ticket 35
Thread-1 is selling ticket 34
Thread-1 is selling ticket 33
Thread-1 is selling ticket 32
Thread-1 is selling ticket 31
Thread-1 is selling ticket 30
Thread-0 is selling ticket 6
Thread-0 is selling ticket 5
Thread-0 is selling ticket 4
Thread-0 is selling ticket 3
Thread-0 is selling ticket 2
Thread-0 is selling ticket 1
Thread-1 is selling ticket 29
Thread-1 is selling ticket 28
Thread-1 is selling ticket 27
Thread-1 is selling ticket 26
Thread-1 is selling ticket 25
Thread-1 is selling ticket 24
Thread-1 is selling ticket 23
Thread-1 is selling ticket 22
Thread-1 is selling ticket 21
Thread-1 is selling ticket 20
Thread-1 is selling ticket 19
Thread-1 is selling ticket 18
Thread-1 is selling ticket 17
Thread-1 is selling ticket 16
Thread-1 is selling ticket 15
Thread-1 is selling ticket 14
Thread-1 is selling ticket 13
Thread-1 is selling ticket 12
Thread-1 is selling ticket 11
Thread-1 is selling ticket 10
Thread-1 is selling ticket 9
Thread-1 is selling ticket 8
Thread-1 is selling ticket 7
Thread-1 is selling ticket 6
Thread-1 is selling ticket 5
Thread-1 is selling ticket 4
Thread-1 is selling ticket 3
Thread-1 is selling ticket 2
Thread-1 is selling ticket 1
 
这是我本机上运行的结果？根本原因在那？有哪位大侠能说说

谢谢诸位的解答