Method and device for providing relative timing in Java virtual machine

Abstract

The embodiment of the invention provides a method and a device for providing relative timing in a Java virtual machine. The method providing the relative timing in the Java virtual machine comprises the following steps: determining whether time of an operation system of the Java virtual machine is changed or not; if so, modifying executing time of a timing task in the Java virtual machine. According to the embodiment of the invention, the time of the operation system of the Java virtual machine is determined to be changed and the executing time of the timing task in the Java virtual machine is modified after the time of the operation system is modified to realize the method providing the relative timing in the Java virtual machine; the technical problems that a relative timing function in the Java virtual machine loses the efficacy once if the time of the operation system in the Java virtual machine is changed, and the timing task is executed in advance, is delayed to be executed or is repeatedly executed can be solved.

Description

technical field [0001] The invention relates to computer technology, in particular to a method and device for providing relative timing in a Java virtual machine. Background technique [0002] Timers can be used to handle timing tasks. Timers can be divided into absolute timers and relative timers. Absolute timers execute timing tasks based on time points, and relative timers execute timing tasks based on time intervals. In practical applications, relative timers are more frequently and widely used. [0003] In the prior art, the function of pthread_cond_timedwait in C language is usually called by a function in the java.util.ScheduledThreadPoolExecutor or java.lang.Timer class library to realize the relative timing function in the Java virtual machine. [0004] However, in the prior art, once the operating system time of the Java virtual machine is changed, the relative timing function in the Java virtual machine will become invalid, thus causing the scheduled task to be ...

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Problems solved by technology

[0004] However, in the prior art, once the operating system time of the Java virtual machine is changed, the relative timing function in the Java virtual machine will become invalid, thus causing the timing task to be executed in advance, delayed or repeated

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