Method and device for installing application program of Java card

The invention discloses an application program installation method and device for a Java card, and the method comprises the steps: opening a cache region at a first installation node, and caching a first class of objects into the cache region; when the second class of objects meet the caching condition, caching the second class of objects into the caching region; when the second class of objects in the cache region meet a saving condition, saving the second class of objects from the cache region to a nonvolatile memory; storing the first class of objects from the cache region to the nonvolatile memory at a second installation node, and closing the cache region; according to the embodiment of the invention, the cache region is set in the RAM cache, and the class object is created in the cache region, so that the RAM cache is utilized to share a part of read-write operations, the advantage of the read-write rate of the RAM cache is fully exerted, and the influence of the relatively low read-write rate of the NV