Coverage rate acquisition method and device for Java program test

The invention relates to the technical field of program testing, and particularly discloses a coverage rate collection method and device for Java program testing, and the method comprises the steps: obtaining source code data of a target application; compiling the source code data of the target application to obtain byte code data of the target application; aiming at a target class in the byte code data of the target application, generating a corresponding brother class; the brother class comprises an auxiliary method for collecting the coverage rate; the operation of accessing and assigning the auxiliary method in the brother class is embedded in the target class; and collecting the coverage rate of the target application by using an auxiliary method, wherein the coverage rate refers to the ratio data of the operated code and the to-be-operated code. By means of the scheme, collection of the coverage rate of the target class is guaranteed, meanwhile, fields or methods are not injected into the target class,