给你一个一秒运行一次的循环线程,如何在其中实现现一个一分钟运行一次的任务? - V2EX
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andybest

给你一个一秒运行一次的循环线程,如何在其中实现现一个一分钟运行一次的任务?

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  •   andybest Jul 3, 2013 2991 views
    This topic created in 4680 days ago, the information mentioned may be changed or developed.
    你只能修改这个一秒被调用执行一次的方法
    需要在这里面实现每一分钟运行一个句任务比如System.out.println("Hello world!");

    是否能实现?实现的思路是什么呢?谢谢!
    6 replies    1970-01-01 08:00:00 +08:00
    gDD
        1
    gDD  
       Jul 3, 2013   1
    弄个static变量用来计数,每次加1,到60了执行输出语句然后归零。
    lichao
        2
    lichao  
       Jul 3, 2013   1
    if ( system.datatime.secOnd== 0) { do .... }
    andybest
        3
    andybest  
    OP
       Jul 3, 2013
    @gDD 谢谢,假设是无法写外围变量的呢?


    @lichao 谢谢,有没有可能在某秒没有判断到system.datatime.secOnd== 0,又或者在某秒被调用了两次?

    比如
    1次:0秒0ms 2次:0秒999ms
    或者:
    1次:59.999ms 2次:1秒0ms

    1us的误差在任何语言都是可能存在的
    lichao
        4
    lichao  
       Jul 3, 2013   1
    @andybest 不会
    lichao
        5
    lichao  
       Jul 3, 2013   1
    @andybest 那是秒,不死毫秒
    andybest
        6
    andybest  
    OP
       Jul 3, 2013
    @lichao 谢谢!
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