如何通过j2me中的电话获取最大可用堆大小？

Question

由于堆大小限制，我的 Midlet 需要针对不同的堆大小以不同的方式执行操作。例如，它应该加载更多或更少的位图字体。

Answer 1

// Get current size of heap in bytes
long heapSize = Runtime.getRuntime().totalMemory();

// Get maximum size of heap in bytes. The heap cannot grow beyond this size.
// Any attempt will result in an OutOfMemoryException.
long heapMaxSize = Runtime.getRuntime().maxMemory();

// Get amount of free memory within the heap in bytes. This size will increase
// after garbage collection and decrease as new objects are created.
long heapFreeSize = Runtime.getRuntime().freeMemory();

另请参阅此运行时 Java 文档