The Java Virtual Machine defines various run-time data areas that are used during execution of a program. Some of these data areas are created on Java Virtual Machine start-up and are destroyed only when the Java Virtual Machine exits. Other data areas are per thread. Per-thread data areas are created when a thread is created and destroyed when the thread exits.

Java虛擬機定義了程序執行期間使用的各種運行時數據區域。其中一些數據區域是在Java虛擬機啟動時創建的，只有在Java虛擬機退出時才會被銷毀。其他數據區域為每個線程。每線程數據區在創建線程時創建，在線程退出時銷毀。