你的执行时间太短了，我for了40次，就出问题了， 好好研究，多看看例题，多想想...... Thread-0value is now1 Thread-1value is now1 Thread-2value is now1 Thread-3value is now1 Thread-0value is now2 Thread-1value is now2 Thread-2value is now2 Thread-3value is now2 Thread-0value is now3 Thread-1value is now3 Thread-2value is now3 Thread-3value is now3 Thread-0value is now4 Thread-1value is now4 Thread-2value is now4 Thread-3value is now4 Thread-0value is now5 Thread-1value is now5 Thread-2value is now5 Thread-3value is now5 Thread-0value is now6 Thread-1value is now6 Thread-2value is now6 Thread-3value is now6 Thread-0value is now7 Thread-1value is now7 Thread-2value is now7 Thread-3value is now7 Thread-0value is now8 Thread-1value is now8 Thread-2value is now8 Thread-3value is now8 Thread-0value is now9 Thread-1value is now9 Thread-2value is now9 Thread-3value is now9 Thread-0value is now10 Thread-1value is now10 Thread-2value is now10 Thread-3value is now10 Thread-0value is now11 Thread-1value is now11 Thread-2value is now11 Thread-3value is now11 Thread-0value is now12 Thread-1value is now12 Thread-2value is now12 Thread-3value is now12 Thread-0value is now13 Thread-1value is now13 Thread-2value is now13 Thread-3value is now13 Thread-0value is now14 Thread-1value is now14 Thread-2value is now14 Thread-3value is now14 Thread-0value is now15 Thread-1value is now15 Thread-2value is now15 Thread-3value is now15 Thread-0value is now16 Thread-1value is now16 Thread-2value is now16//看看小子，这里已经出错了，呵呵 Thread-0value is now17 Thread-1value is now17 Thread-2value is now17 Thread-3value is now16 Thread-0value is now18 Thread-1value is now18 Thread-2value is now18 Thread-3value is now17 Thread-0value is now19 Thread-1value is now19 Thread-2value is now19 Thread-3value is now18 Thread-0value is now20 Thread-1value is now20 Thread-2value is now20 Thread-3value is now19 Thread-0value is now21 Thread-1value is now21 Thread-2value is now21 Thread-3value is now20 Thread-0value is now22 Thread-1value is now22 Thread-2value is now22 Thread-3value is now21 Thread-0value is now23 Thread-1value is now23 Thread-2value is now23 Thread-3value is now22 Thread-0value is now24 Thread-1value is now24 Thread-2value is now24 Thread-3value is now23 Thread-0value is now25 Thread-1value is now25 Thread-2value is now25 Thread-3value is now24 Thread-0value is now26 Thread-1value is now26 Thread-2value is now26 Thread-3value is now25 Thread-0value is now27 Thread-1value is now27 Thread-2value is now27 Thread-3value is now26 Thread-0value is now28 Thread-1value is now28 Thread-2value is now28 Thread-3value is now27 Thread-0value is now29 Thread-1value is now29 Thread-2value is now29 Thread-3value is now28 Thread-0value is now30 Thread-1value is now30 Thread-2value is now30 Thread-3value is now29 Thread-0value is now31 Thread-1value is now31 Thread-2value is now31 Thread-3value is now30 Thread-0value is now32 Thread-1value is now32 Thread-2value is now32 Thread-3value is now31 Thread-0value is now33 Thread-1value is now33 Thread-2value is now33 Thread-3value is now32 Thread-0value is now34 Thread-3value is now33 Thread-0value is now35 Thread-1value is now34 Thread-2value is now34 Thread-0value is now36 Thread-1value is now35 Thread-3value is now34 Thread-0value is now37 Thread-1value is now36 Thread-2value is now35 Thread-3value is now35 Thread-0value is now38 Thread-1value is now37 Thread-2value is now36 Thread-3value is now36 Thread-0value is now39 Thread-1value is now38 Thread-2value is now37 Thread-3value is now37 Thread-0value is now40 Thread-1value is now39 Thread-2value is now38 Thread-3value is now38 Thread-1value is now40 Thread-2value is now39 Thread-3value is now39 Thread-2value is now40 Thread-3value is now40
好好研究，多看看例题，多想想......
Thread-0value is now1
Thread-1value is now1
Thread-2value is now1
Thread-3value is now1
Thread-0value is now2
Thread-1value is now2
Thread-2value is now2
Thread-3value is now2
Thread-0value is now3
Thread-1value is now3
Thread-2value is now3
Thread-3value is now3
Thread-0value is now4
Thread-1value is now4
Thread-2value is now4
Thread-3value is now4
Thread-0value is now5
Thread-1value is now5
Thread-2value is now5
Thread-3value is now5
Thread-0value is now6
Thread-1value is now6
Thread-2value is now6
Thread-3value is now6
Thread-0value is now7
Thread-1value is now7
Thread-2value is now7
Thread-3value is now7
Thread-0value is now8
Thread-1value is now8
Thread-2value is now8
Thread-3value is now8
Thread-0value is now9
Thread-1value is now9
Thread-2value is now9
Thread-3value is now9
Thread-0value is now10
Thread-1value is now10
Thread-2value is now10
Thread-3value is now10
Thread-0value is now11
Thread-1value is now11
Thread-2value is now11
Thread-3value is now11
Thread-0value is now12
Thread-1value is now12
Thread-2value is now12
Thread-3value is now12
Thread-0value is now13
Thread-1value is now13
Thread-2value is now13
Thread-3value is now13
Thread-0value is now14
Thread-1value is now14
Thread-2value is now14
Thread-3value is now14
Thread-0value is now15
Thread-1value is now15
Thread-2value is now15
Thread-3value is now15
Thread-0value is now16
Thread-1value is now16
Thread-2value is now16//看看小子，这里已经出错了，呵呵
Thread-0value is now17
Thread-1value is now17
Thread-2value is now17
Thread-3value is now16
Thread-0value is now18
Thread-1value is now18
Thread-2value is now18
Thread-3value is now17
Thread-0value is now19
Thread-1value is now19
Thread-2value is now19
Thread-3value is now18
Thread-0value is now20
Thread-1value is now20
Thread-2value is now20
Thread-3value is now19
Thread-0value is now21
Thread-1value is now21
Thread-2value is now21
Thread-3value is now20
Thread-0value is now22
Thread-1value is now22
Thread-2value is now22
Thread-3value is now21
Thread-0value is now23
Thread-1value is now23
Thread-2value is now23
Thread-3value is now22
Thread-0value is now24
Thread-1value is now24
Thread-2value is now24
Thread-3value is now23
Thread-0value is now25
Thread-1value is now25
Thread-2value is now25
Thread-3value is now24
Thread-0value is now26
Thread-1value is now26
Thread-2value is now26
Thread-3value is now25
Thread-0value is now27
Thread-1value is now27
Thread-2value is now27
Thread-3value is now26
Thread-0value is now28
Thread-1value is now28
Thread-2value is now28
Thread-3value is now27
Thread-0value is now29
Thread-1value is now29
Thread-2value is now29
Thread-3value is now28
Thread-0value is now30
Thread-1value is now30
Thread-2value is now30
Thread-3value is now29
Thread-0value is now31
Thread-1value is now31
Thread-2value is now31
Thread-3value is now30
Thread-0value is now32
Thread-1value is now32
Thread-2value is now32
Thread-3value is now31
Thread-0value is now33
Thread-1value is now33
Thread-2value is now33
Thread-3value is now32
Thread-0value is now34
Thread-3value is now33
Thread-0value is now35
Thread-1value is now34
Thread-2value is now34
Thread-0value is now36
Thread-1value is now35
Thread-3value is now34
Thread-0value is now37
Thread-1value is now36
Thread-2value is now35
Thread-3value is now35
Thread-0value is now38
Thread-1value is now37
Thread-2value is now36
Thread-3value is now36
Thread-0value is now39
Thread-1value is now38
Thread-2value is now37
Thread-3value is now37
Thread-0value is now40
Thread-1value is now39
Thread-2value is now38
Thread-3value is now38
Thread-1value is now40
Thread-2value is now39
Thread-3value is now39
Thread-2value is now40
Thread-3value is now40