Multithreading preloading method for class library in Java virtual machine

Abstract

The invention provides a multithreading preloading method for a class library in a Java virtual machine. The method comprises the steps that firstly, the class library is connected to generate a preloading list, and the preloading list comprises classes needing to be preloaded when the virtual machine is operated; then, the classes in the preloading list are averagely distributed to all threads according to the number of the threads, meanwhile, the threads are started, the classes in the list are loaded in an internal memory, and static variables in the classes are initialized; finally, the preloaded classes are stored in a shared memory resource. According to the method, the classes which need to be loaded many times or must reside in the memory when a Java program operates are screened and recorded, the preloaded class library is automatically adjusted along with an application program and the change of user use habits, and the operating efficiency of the Java program is effectively improved. Meanwhile, the classes in the preloading list are synchronously loaded through multithreading, and the loading speed of the class library in the starting stage of the Java virtual machine is effectively improved.

Description

technical field [0001] The invention relates to a class loading technology in a Java virtual machine, in particular to a class preloading method in a mobile phone system Java virtual machine. Background technique [0002] The class loader is mainly responsible for querying and loading class files in the virtual machine. The class loader loads the data structure of the class during the running process by analyzing the binary file, and then calls it, and loads and connects all superclasses and interfaces between superclasses in the class at the same time. When a virtual machine needs to load a class, the class loader will search for the bytecode file corresponding to the class, then load the bytecode file, extract the required data information and store it in memory. [0003] The Java virtual machine running on the mobile phone, such as the Dalvik virtual machine under the Android system, is preloaded when the device is turned on, and all basic classes are loaded into the mem...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems that the amount of basic resources preloaded by the current class loader is large and the booting process is long, the present invention proposes a multi-thread preloading method for a class library in a Java virtual machine

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